Pregled Naučnih I Stručnih Rezultata Instituta Ims U 2014. Godini Review of Research and Business Results of the Ims Institute in 2014

REVIEW PREGLED OF RESEARCH NAUČNIH I STRUČNIH AND BUSINESS RESULTS REZULTATA OF THE IMS INSTITUTE INSTITUTA IMS IN 2014 U 2014. GODINI

Institut za ispitivanje materijala a.d.

Beograd, decembar 2014. PREGLED NAUČNIH I STRUČNIH REZULTATA INSTITUTA IMS U 2014. GODINI REVIEW OF RESEARCH AND BUSINESS RESULTS OF THE IMS INSTITUTE IN 2014

Izdavač Institut IMS a.d. Beograd, Bulevar vojvode Mišića 43 [email protected] www.institutims.rs

Za izdavača Dr Vencislav Grabulov

Urednici Dr Vencislav Grabulov Dr Aleksandra Mitrović Goran Petrović

Štampa Razvojno-istraživački centar grafičkog inženjerstva Tehnološko-metalurški fakultet, Beograd, Karnegijeva 4

Tiraž 250 primeraka

ISBN 978-86-82081-24-1

Tokom 2014. godine, Institut za ispitivanje materijala je ostvario ozbiljne naučne i poslovne uspehe. U okviru tekućeg ciklusa naučnih projekata za period 2011-2014. godina, 22 istraživača Instituta IMS uključeni su u realizaciju sedam projekata iz tehnološkog razvoja, jedan integralni projekat i četiri projekta iz programa osnovnih istraživanja. Ono čime se Institut IMS može ponositi je 15 mladih istraživača upisanih na doktorske studije, čije školovanje finansiramo iz sopstvenih sredstava. Rezultati istraživačkog rada su u skladu sa dosadašnjim trendom rasta broja publikacija u međunarodnim časopisima i učešća istraživača na vodećim međunarodnim skupovima. U ovoj godini, Institut IMS je organizator četiri naučno-stručna skupa. Odabrane stručne reference su, kao i svake godine, impresivne. Uz sve probleme sa kojima je suočena domaća privreda, a posebno građevinska industrija, Institut IMS je uspeo da obezbedi učešće u najznačajnijim projektima u zemlji i regionu. U skladu sa višedecenijskom tradicijom i ugledom, kao i širokim spektrom usluga koje pružamo, bili smo angažovani na projektovanju, ispitivanjima i istraživanjima građevinskih objekata, materijala i proizvoda, primeni tehnologija građenja i sistema prednaprezanja. U 2014. godini Institut je učestvovao u najznačajnijim projektima u regionu, kao što su most Zemun-Borča ili koridori X i XI. Doprineli smo otklanjanju posledica katastrofalnih poplava koje su pogodile region, posebno kroz sanaciju brojnih klizišta. Nastavili smo rad na zaštiti graditeljskog nasleđa, obnovi i izgradnji putnih objekata duž autoputeva i magistralnih i regionalnih puteva u Srbiji, na revitalizaciji HE Đerdap 1, u Kostolcu i na drugim hidro i termo-elektranama, kao i na primeni IMS tehnologije građenja i sistema prednaprezanja.

Urednici

Pregled naučnih i stručnih rezultata u 2014. godini 1

SADRŽAJ

REZULTATI NAUČNO-ISTRAŽIVAČKOG RADA ...... 3 T 150 TEHNOLOGIJA MATERIJALA ...... 5 Rad u vrhunskom međunarodnom časopisu (M21) ...... 7 Rad u istaknutom međunarodnom časopisu (M22) ...... 11 Rad u međunarodnom časopisu (M23) ...... 13 Rad u časopisu međunarodnog značaja (M24) ...... 15 Saopštenje sa međunarodnog skupa štampano u celini (M33) ...... 17 Saopštenje sa međunarodnog skupa štampano u izvodu (M34) ...... 23 Rad u vodećem časopisu nacionalnog značaja (M51) ...... 27 Saopštenje sa skupa nacionalnog značaja štampano u celini (M63) ...... 30 T 152 KOMPOZITNI MATERIJALI ...... 35 Saopštenje sa međunarodnog skupa štampano u celini (M33) ...... 36 Saopštenje sa međunarodnog skupa štampano u izvodu (M34) ...... 38 T 220 GRAĐEVINARSTVO, HIDRAULIKA, PRIOBALNA TEHNOLOGIJA, MEHANIKA TLA ...... 39 Rad u vrhunskom međunarodnom časopisu (M21) ...... 40 Rad u istaknutom međunarodnom časopisu (M22) ...... 42 Rad u međunarodnom časopisu (M23) ...... 43 Rad u časopisu međunarodnog značaja (M24) ...... 44 Saopštenje sa međunarodnog skupa štampano u celini (M33) ...... 45 Rad u časopisu nacionalnog značaja (M52) ...... 50 T 230 VISOKA GRADNJA ...... 51 Saopštenje sa međunarodnog skupa štampano u celini (M33) ...... 52 Rad u časopisu nacionalnog značaja (M52) ...... 54 2 Institut za ispitivanje materijala a. d. Beograd

T450 TEHNOLOGIJA METALA, METALURGIJA, PROIZVODI OD METALA ...... 55 Rad u istaknutom međunarodnom časopisu (M22) ...... 56 Rad u međunarodnom časopisu (M23) ...... 57 Rad u časopisu međunarodnog značaja (M24) ...... 60 Predavanje po pozivu sa međunarodnog skupa štampano u celini (M31) ...... 63 Saopštenje sa međunarodnog skupa štampano u celini (M33) ...... 65 Rad u vodećem časopisu nacionalnog značaja (M51) ...... 66 Tehnička i razvojna rešenja (M80) ...... 69 B 003 EKOLOGIJA ...... 71 Saopštenje sa međunarodnog skupa štampano u celini (M33) ...... 72 T 150 PETROLOGIJA, MINERALOGIJA, GEOHEMIJA ...... 73 Rad u časopisu međunarodnog značaja (M24) ...... 74 Saopštenje sa međunarodnog skupa štampano u celini (M33) ...... 76 Rad u vodećem časopisu nacionalnog značaja (M51) ...... 80 Saopštenje sa skupa nacionalnog značaja štampano u celini (M63) ...... 81 DOKTORSKE DISERTACIJE ...... 83 ORGANIZACIJA STRUČNIH SKUPOVA ...... 87 NAUČNI PROJEKTI FINANSIRANI OD STRANE MINISTARSTVA PROSVETE, NAUKE I TEHNOLOŠKOG RAZVOJA ...... 93 ODABRANE STRUČNE REFERENCE ...... 97 CENTAR ZA MATERIJALE ...... 99 CENTAR ZA METALE I ENERGETIKU ...... 107 CENTAR ZA PUTEVE I GEOTEHNIKU ...... 113 CENTAR ZA KONSTRUKCIJE I PREDNAPREZANJE ...... 123 SERTIFIKACIONO TELO ...... 129 KONTROLNO TELO ...... 133 Pregled naučnih i stručnih rezultata u 2014. godini 3

RESULTS REZULTATI OF SCIENTIFIC RESEARCH NAUČNO-ISTRAŽIVAČKOG WORK RADA 4 Institut za ispitivanje materijala a. d. Beograd

Pregled naučnih i stručnih rezultata u 2014. godini 5

T 150 T 150 MATERIAL TEHNOLOGIJA TECHNOLOGY MATERIJALA

6 Institut za ispitivanje materijala a. d. Beograd POGLAVLJE U MONOGRAFIJI MEĐUNARODNOG ZNAČAJA (M14)

M. Arsenović, L. Pezo, L. Mančić, Z. Radojević

PREDICTION AND OPTIMIZATION OF HEAVY CLAY PRODUCTS QUALITY Advanced materials for agriculture, food and environmental safety, Ch. 4, 87- 120, Advanced materials series (edited by Ashutosh Tiwari and Mikael Syväjärvi), Scrivener publishing, Wiley, Beverly, USA, 2014. DOI: 10.1002/9781118773857 The effects of chemical composition, firing temperature (800–1100°C), and several shape formats of laboratory brick samples on the final product quality were investigated. Prediction of the final laboratory products parameters was evaluated by second order polynomial regression models (SOPs) and artificial neural networks (ANNs), and afterwards compared to experimental results. SOPs showed high r2 values (0.897 - 0.913 for compressive strength models, 0.942-0.962 for water absorption, 0.928 for firing shrinkage, 0.988-0.991 for water loss during firing and 0.941 for volume mass of cubes models). ANN model, coupled with sensitivity analysis, was obtained with high prediction accuracy: 0.866–0.939 for compressive strength models, 0.954–0.974 for water absorption, 0.882 for firing shrinkage, 0.982-0.988 for water loss during firing and 0.920 for volume mass of cubes models. The optimal samples chemical composition and firing temperature were chosen depending on a final usage of the raw material in heavy clay brick industry. Keywords: heavy clay products, prediction, optimization.

Pregled naučnih i stručnih rezultata u 2014. godini 7 RAD U VRHUNSKOM MEĐUNARODNOM ČASOPISU (M21)

L. Pezo, M. Arsenović, Z. Radojević

ANN MODEL OF BRICK PROPERTIES USING LPNORM CALCULATION OF MINERALS CONTENT Ceramics International, 2014, Vol. 40, 9637-9645. Mineralogical composition of heavy clays is one of the most important properties when stadying raw materials in brick industry. Within this study, quantitative determination of minerals using LPNORM calculation was performed, using the first algorithm among the so-called norms that allows the introduction of a list of minerals and their configuration. This algorithm is implemented for the first time in practice, in order to calculate the minerals content in brick raw materials. The influence of minerals quantity, along with the firing temperature (800–1100 °C), and several shape formats of laboratory brick samples were investigated, and the acquired data were used to build Artificial Neural Network (ANN) model. ANN model was developed in order to predict the final products parameters, and its results have been afterwards compared to experimental data. ANN model, coupled with sensitivity analysis, was obtained with high prediction accuracy, according to coefficient of determination, r2: 0.880-0.884 in compressive strength calculation, 0.954-0.960 for water absorption, 0.869 for firing shrinkage, 0.979-0.984 for water loss during firing and 0.907 for volume mass of cubes model. Keywords: heavy clay, mineral content, brick quality, Artificial Neural Networks, sensitivity analysis.

M. Vasić, Ž. Grbavčić, Z. Radojević

DETERMINATION OF THE EFFECTIVE DIFFUSIVITY COEFFICIENT AND MATHEMATICAL MODELING OF DRYING DATA: APPLICATION TO DRYING OF CLAY TILES Chemical Engineering and Processing, 2014, Vol. 76, 33-44. Drying plays an important role in the production of clay tiles. In the present article, drying process is analyzed taking experimental data for several masonry 8 Institut za ispitivanje materijala a. d. Beograd clays obtained from different clay tile manufacturers and published data for different clay slabs. Calculation methods and computer programs designed for the calculation of the effective diffusion coefficient are developed. The first calculation method represents the analytical solution of the Crank Equation, while the second one represents the analytical solution of the Efremov Equation with boundary conditions in the form of the flux. Unlike other materials, clay tiles exhibit shrinkage during the drying process. For this reason, a shrinkage correction is included in both calculation methods. Four models (A1, A2, B1 and B2) for predicting the drying behaviour are obtained as the result of the calculation cited programs. It is shown that the calculated effective diffusion coefficient determined by the designed computer programs, using experimentally obtained and selected published data sets have similar values to those of the same coefficient reported in the literature. Based on the mathematically determined prognostic values of the effective diffusion coefficient, it was concluded that there is more than 90% agreement between the experimentally recorded and the calculated drying curves. Keywords: diffusivity; clay tiles; mathematical modeling; convective drying.

M. Vasić, Ž. Grbavčić, Z. Radojević

ANALYSIS OF MOISTURE TRANSFER DURING THE DRYING OF CLAY TILES WITH PARTICULAR REFERENCE TO AN ESTIMATION OF THE TIME-DEPENDENT EFFECTIVE DIFFUSIVITY Drying Technology, 2014, Vol. 32, No. 7, 829-840. Description of the drying process is reduced to the establishment of a series theoretical and empirical drying models. Complex processes of simultaneous moisture and heat transfer, which are often non-stationary and the distinct nature and properties of the drying material, complicate even more the description of drying process.Three theories: the diffusion theory, the capillary flow theory and the "evaporation-condensation theory" have won a general recognition for explanation of the moisture transfer in porous media. The mechanisms of moisture movement during drying in the constant and especially in the falling drying period is rather complex, and up to now there was no generally accepted explanations which could identify the exact transition Pregled naučnih i stručnih rezultata u 2014. godini 9 between possible drying mechanisms such as: liquid movement due to capillary forces, liquid diffusion due to concentration gradients, liquid and vapor flow due to differences in total pressure, vapor diffusion due to difference in vapor concentration, vapor diffusion due to partial-vapor pressure gradients, Knudsen diffusion, thermo diffusion and evaporation -condensation mechanism. The goal of this study was to find a way to better understand different drying mechanisms, to identify exact transition between them and to estimate a time dependent effective diffusivity. Results presented in this study have confirmed the fact that effective diffusivity represents an overall mass transport property of moisture which includes all possible moisture transport mechanisms which are simultaneously controlling the moisture migration process in material during drying. Experimental investigations were carried out, on clay tiles, in a laboratory recirculation dryer in which drying parameters (humidity, temperature, and velocity) could be programmed, controlled and monitored during drying. Keywords: drying mechanisms, effective diffusivity, clay tile, drying, shrinkage.

A. Mitrović, M. Zdujić

PREPARATION OF POZZOLANIC ADDITION BY MECHANOCHEMICAL TREATMENT OF KAOLIN CLAY International Journal of Mineral Processing, 2014, 132, 59–66. Batches containing 5 kg of Serbian medium-quality kaolin clay were mechanically treated in a conventional ball mill for 10, 30, 60, 120, 600 and 1200 min of milling time. High reactive pozzolanic addition was obtained as a result of a number of physicochemical changes induced by milling, namely particle size reduction, specific surface area increase, morphization/ dehydroxylation of kaolinite phase and homogenization of clay constituents. The main characteristics of the pozzolanic material obtained after 1200 min of milling were: median particle size of 6.35 μm, specific surface area of 21.75m2 g−1, total pore volume of 0.0580 cm3 g−1, pozzolanic activity (compressive strength) of 14MPa, and reactive silica content of 33.3 wt.%. Continuous increase of pozzolanic activity, despite the agglomeration of particles that was accompanied with specific surface area decrease when milling time was 10 Institut za ispitivanje materijala a. d. Beograd prolonged, could be explained by kaolinite amorphization as well as the mechanical activation of quartz.. Keywords: Milling, Clays, Kaolinite, Quartz, Pozzolan.

Pregled naučnih i stručnih rezultata u 2014. godini 11 RAD U ISTAKNUTOM MEĐUNARODNOM ČASOPISU (M22)

M. Arsenović, L. Pezo, L. Mančić, Z. Radojević

THERMAL AND MINERALOGICAL CHARACTERIZATION OF LOESS HEAVY CLAYS FOR POTENTIAL USE IN BRICK INDUSTRY Thermochimica Acta, 2014, Vol. 580, 38-45. This paper describes a study of 11 selected samples of loess soil from Serbia, by using differential scanning calorimetry, simultaneously with thermogravimetry and its differential calculation, known as simultaneous thermal analysis (STA). This survey is supplemented by chemical and mineralogical analysis, particle size distribution, and plasticity and drying susceptibility tests. Correlation analysis of major oxides content and certain technological test results were used for better understanding of the raw material composition and product physical properties. The results indicate that the samples were rich in carbonates, with the highest content of alevrite fraction and variable content of clay-sized particles. Mineralogical analysis confirms significant correlations between major oxides content and reveals that the most common non-clay mineral present is quartz, followed by calcite, dolomite and sodium feldspar. Major clay minerals include illite, chlorite, smectite and, in some cases, low quantities of kaolinite. Although STA method is well-known, this is the first time that it was used for discussion about its practical aspect, for characterization of the loess deposits, in terms of exploitation in brick industry.

Keywords: loess deposits, thermal analysis, brick industry

A. Prstić, Z. Aćimović-Pavlović, A. Terzić, Lj. Pavlović

SYNTHESIS AND CHARACTERIZATION OF NEW REFRACTORY COATINGS BASED ON TALC, CORDIERITE, ZIRCON AND MULLITE FILLERS FOR LOST FOAM CASTING PROCESS Archives of Metallurgy and Materials, 2014, Vol. 52, No. 1, 89-95. This study presents results of the investigation of the high-temperature materials - refractory coatings based on different refractory fillers talc, cordierite, zircon and mullite, which are applied in Lost Foam casting process. Design and optimization of the coatings composition with controlled, rheological properties 12 Institut za ispitivanje materijala a. d. Beograd included, and consequently synthesis was achieved by application of different coating components, namely different suspension agents and fillers and by alteration of the coating production procedure. Morphologic and microstructural analysis of fillers was carried out by means of scanning electronic microscope. X-ray diffraction analysis by means of X-ray diffractometer was applied in determination and monitoring the phase composition changes of the refractory fillers. An analysis of the particle size and shape was carried out by means of the PC software application package OZARIA 2.5. To assess the effects of application of individual refractory coatings, a detailed investigation of structural and mechanical properties of the moldings obtained was performed. Highlight was placed on revealing and analyzing surface and volume defects present on moldings. Radiographic molding tests were carried out by means of the X-ray device SAIFORT type-S200. Attained results are essential for the synthesis of refractory coatings based on high-temperature fillers and their applications in Lost Foam casting process for manufacturing of moldings with in-advance-set properties. Keywords: high-temperature materials, refractory coatings, talc, cordierite, zircon, mullite, Lost Foam.

Pregled naučnih i stručnih rezultata u 2014. godini 13 RAD U MEĐUNARODNOM ČASOPISU (M23)

A. Terzić, Lj. Andrić, M. Petrov, Z. Radojević, Lj. Miličić

INVESTIGATION OF HIGH TEMPERATURE BEHAVIOR AND SINTERING MECHANISM OF FLY ASH BASED CONCRETES Romanian Journal of Materials, 2014, Vol. 44, No. 3, 213–224. Four types of refractory concretes with the same matrix composition, one based on corundum aggregate, the other on bauxite aggregate and chamotte filler, and two additional variations with the same compositions and 30 % of fly ash replacement in bonding agent, have been studied at temperatures ranging from room temperature to 1400°C as adopted maximal temperature. Fly ash was mechanically activated by means of planetary ball mill type “Retsch-PM100”. Samples were dried at 110°C during 24 h to create standard specimens. Afterwards, the samples were prefired at 1100°C and subsequently subjected to compressive uniaxial creep test conducted at various temperatures (1200, 1300 and 1400°C). Thermal behavior was also investigated by dilatometry from room temperature up to 1400°C. The evolution of the refractory concretes behavior from quasi-brittle to visco-plastic was investigated and correlated to their microstructure evolution induced by sintering process. The influence of the firing temperature and duration on the concretes behavior is also discussed. Creep test and dilatometic analysis helped in defining of the mechanism of sintering and its parameters, and additionally damageable and viscoplastic nature of the refractory concrete. Keywords: sintering; thermal treatment; composites; thermal properties; environment.

K. Janković, Lj. Miličić, S. Stanković, N. Šušić

INVESTIGATION OF THE MORTAR AND CONCRETE RESISTANCE IN AGGRESSIVE SOLUTIONS Technical Gazette, 2014, Vol. 21, No.1, 173-176. Testing the influence of two aggressive solutions - sulfate and nitrate on mortar and concrete was presented in this paper. Experimental work included testing of 14 Institut za ispitivanje materijala a. d. Beograd mortar prisms with 5 % special admixture. Also, four types of concrete were exposed to aggressive solutions. The chemical resistance was tested according to the Koch-Steinegger method. As a condition for resistance in aggressive solution means that flexural strength of mortar prisms no less than 70 % of referent prisms cured in water it can be concluded that mortar and concrete made with combination of cement and admixture presented in this investigation are not resistant to ammonium nitrate solution, but is resistant to sulfate corrosion. Keywords: chemical aggression, concrete, Koch-Steinegger method, mortar.

K. Janković, A. Ilić, M. Stojanović

THE INFLUENCE OF SILICA FUME AND CURING REGIME ON SOME PROPERTIES OF CONCRETE Romanian Journal of Materials, 2014, Vol. 44, No. 1, 46-53. The investigation of possibilities of concrete structure modification by silica fume to improve concrete properties was presented in this report. Percentage of silica fume in regard to cement varied between 0% and 20%. Concrete was cured as follows: in water, steam – curing regime at +60oC and +90oC. The results of the compressive and tensile strength, freeze / thaw resistance with de- icing salts, and depth of penetration of water under pressure. Кeywords: silica fume, steam – curing regime, concrete durability.

Pregled naučnih i stručnih rezultata u 2014. godini 15 RAD U ČASOPISU MEĐUNARODNOG ZNAČAJA (M24)

M. Arsenović, S. Stanković, Z. Radojević, L. Pezo

THE EFFECTS OF CHEMICAL COMPOSITION AND FIRING TEMPERATURE IN HEAVY CLAY BRICK PRODUCTION – CHEMOMETRIC APPROACH Interceram, 2014, Vol. 01–02 (Special issue Tile and Brick), 26-29. Factors influencing final clay brick properties are numerous, since the raw materials are highly heterogeneous. The chemometric approach is rarely used in analysis in this field, although it could significantly improve understanding of the overall system behavior and the quality of products. Principal component analysis (PCA) was used on a group of 139 samples collected in Serbia to discriminate groups of samples according to similarity of chemical composition and fired laboratory products properties. The focus of this study was to determine the importance of parameters that describe clay brick production and quality, depending on final usage of raw material in the clay brick industry. A fuzzy synthetic evaluation, using a membership trapezoidal function with defined optimal interval values for different types of heavy clay products, is chosen for the study. The optimal sample‘s chemical composition and firing temperature were chosen by the fuzzy synthetic evaluation, regarding the kind of the heavy clay product. Keywords: heavy clay, brick, chemometry, principal component analysis (PCA).

K. Janković, D. Bojović, M. Stojanović, Lj. Lončar

RESISTANCE OF CEM III/B BASED MATERIALS TO ACID ATTACK

Građevinski materijali i konstrukcije, 2014, Vol. 57, No. 2, 29-37. Cement based materials in the agricultural and other industrial structures are exposed to acid attack. That is the reason why the service life of structure depends on the durability of mortar or concrete elements in aggressive 16 Institut za ispitivanje materijala a. d. Beograd environment. Resistance to corrosion caused by sulphate, nitrate, carbamide, lactic acid and acetic acid was presented. Optical and scanning electron microscopy (SEM) was used to examine the effect of aggressive solutions on the microstructure and mechanical properties of mortar. The chemical resistance of mortar prisms and two types of concrete were tested according to the Koch- Steinegger method. As the condition for resistance in aggressive solution is that flexural strength of mortar prisms is no less than 70 % compared to referent prisms cured in water it can be concluded that mortar and concrete made with CEM III/B in this investigation are resistant to all treated acids. Keywords: chemical aggression, CEM III/B, Koch-Steinegger method, durability.

Pregled naučnih i stručnih rezultata u 2014. godini 17 SAOPŠTENJE SA MEĐUNARODNOG SKUPA ŠTAMPANO U CELINI (M33)

M. Arsenović, L. Pezo, Z. Radojević

BRICKS MADE OF LOESS – OPTIMIZATION USING PRINCIPAL COMPONENT ANALYSIS International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD) 911-917. The loess heavy clay sample MI2, containing about 65 % of silt sized particles, was mixed with two heavy clays at neighboring locations (SU1 and SU3). Added materials contained less allevrolite fraction. The effect of process parameters on the bricks production, such as firing temperature (900–1000 °C), and concentration of 2 added clays (both in the range of 0-10 wt.%) were investigated in terms of independent parameters: compressive strength, water absorption, firing shrinkage, weight loss during firing and volume mass. Developed models were capable to predict responses in a wide range of parameters and showed good coefficients of determination, in the range of 0.438 - 0.999. Keywords: prediction, process parameters, loess heavy clay, brick, Response Surface Method.

M. Vasić, Z. Radojević

DRYING SIMULATION OF CLAY TILES MADE FROM THE RAW MATERIALS HAVING LESS CLAY FRACTION Modtech International Conference 2014, Gliwice, Poland, July 13-16, 2014, published in Advanced Material Research, 2014, Vol. 1036, 3-8. In order to describe the internal moisture rate and to take all different mechanisms of moisture movement into account, it is suitable to use effective diffusivity as a measure of moisture rate, irrespectively of the mechanisms really involved. This means that all different mechanisms and driving forces for internal moisture transport are lumped together and introduced into effective moisture diffusivity. Hence, diffusion equations are retained and reused with the effective diffusivity coefficient as a measuring parameter of internal moisture 18 Institut za ispitivanje materijala a. d. Beograd ratio. In our previous studies we have presented the calculation method which assumed constant diffusivity. The next goal was to estimate effective diffusivity at various moisture contents, in a real case of non-linear drying curves, and to predict drying kinetic. In our last study we have developed a model for determination of the variable effective diffusivity and identification of the exact transition points between possible drying mechanisms. In this paper we have tried to develop more accurate tool for determination of time dependent effective moisture diffusivity. An analytical model and computing procedure were developed to evaluate mass transfer properties and describe drying kinetic of clay tiles having less clay fraction. The proposed procedure was validated with experimental drying data. Presented results have demonstrated that the proposed dying model can be applied for the accurate description of experimental drying kinetics and a reliable estimation of effective diffusivity. Keywords: drying mechanisms, effective diffusivity, clay tile, drying, shrinkage.

M. Vasić, Z. Radojević

DRYING SIMULATION OF SHRINKABLE CLAY TILES USING VARIABLE DIFFUSIVITY MODEL Modtech International Conference 2013, Sinaia, Romania, June 27-29, 2013, published in Advanced Material Research, 2014, Vol. 873, 506-510. This paper represents the upgrade of our previous study in which we have presented a model for simulation of the drying kinetic and estimation of the effective moisture diffusivity of clay tiles using a constant diffusivity model. The main objective of this study is to determine the time - dependent effective moisture diffusivity of shrinkable clay tiles. Experimental investigations were carried out, on clay tiles, in a laboratory recirculation dryer in which drying parameters (humidity, temperature, and velocity) could be programmed, controlled and monitored during drying. Results presented in this study have shown that the proposed drying model describes and correlates accurately drying kinetics and gives a reliably estimation of the time - dependent effective moisture diffusivity. Keywords: drying mechanisms, effective diffusivity, clay tile, drying, shrinkage. Pregled naučnih i stručnih rezultata u 2014. godini 19

A. Terzić, Lj. Miličić, Z. Radojević, Lj. Andrić, Lj. Pavlović

STUDY OF THE SINTERING PROCESS KINETICS OF CORUNDUM REFRACTORY SHOTCRETE 46th International October Conference on Mining and Metallurgy, Bor, 2014, 72-75. Corundum based refractory shotcrete with addition of coal ash as microfiller was investigated. The fly ash underwent mechanical activation in vibratory mill before mixing with high aluminate cement, by such fulfilling the request for obtaining a low-cement castable. The shotcrete samples were dried at 110°C during 24 h to create standard specimens for investigation of mechanical and thermal properties, which were studied in temperature interval 20 - 1400°C. Kinetics of sintering was investigated by differential thermal analysis at three heating rates. The evolution of shotcrete properties was investigated and correlated to microstructural changes induced by temperature and microfiller addition. The combination of advantages in investigated refractory shotcrets makes it suitable for use in severe conditions at high temperature in refractory industries. Keywords: sintering, refractories, coal ash, corundum, mechanical activation.

K. Janković, D. Bojović, Lj. Lončar, M. Stojanović

WEATHER RESISTANCE OF PAVING UNITS AND KERBS WITH DIFFERENT TYPES OF CEMENT International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD) 927-934 Properties of air voids in hardened concrete are analyzed by RapidAir 457. Air content and w/c of fresh concrete was not in accordance with the recommendations of EN 206-1 for exposure class XF2. After obtained results of air void specing factor according to EN 480-11, it was expected according to SRPS U.M1.206 that all types of concrete will satisfied class XF2. Results obtaing by testing freeze/thaw resistance with de-icing salt according to EN 1338 confirm that. Key words: freeze/thaw,air void,specing factor. 20 Institut za ispitivanje materijala a. d. Beograd

K. Janković, D. Bojović, Lj. Lončar, M. Stojanović

DETERMINATION DEICING SALT SCALING RESISTANCE OF CONCRETE WITH RECYCLED BRICK AGGREGATE International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD) 935-940. Determination of the concrete resistance to frost action in the presence of de- icing salt is defined by EN standards as well as numerous national standards. Determination of the quantity and spacing factor of pores in the hardened concrete can provide reliable assessment of the durability of concrete in the XF exposure classes. The application of this method is questionable in the case of application aggregate with increased water absorption. In the case of application of recycled aggregates from crushed brick this fact is especially pronounced. The aim of the paper is to compare test method with device RapidAir 457 and the classic tests on concrete with recycled aggregates. Keywords: freeze/thaw, air void, spacing factor, crushed brick.

D. Bojović, K. Janković, M. Stojanović, Lj. Lončar,

CHANGING THE STRUCTURE OF CONCRETE AFTER EXPOSURE TO FROST

International Conference Contemporary Achievement In Civil Engineering, Subotica, 2014, 497-501. Concrete testing can be done at micro, mezzo and macro level. Tests at the macro level are the most common and are the ultimate engineering approach, and include testing and comparison of quantities such as commpresive strength, modulus of elasticiti and the like. In this manner you can determine changes in structures of concrete. To be considered during the examination and the file structure of concrete should be seen as concrete material composed of cement stone and aggregate, that is switch to a lower level of analysis – mezzo level. Concrete exposed to freezing changes its characteristics both in terms of strength and in terms of the structure. The aim of this study is to determine how to modify the structure of the concrete after frost action. Changing the structure of concrete was evaluated qualitative and quantitative analysis of pores using a device RapidAir 457. Pregled naučnih i stručnih rezultata u 2014. godini 21

Keywords: frost resistance, pores, RapidAir 457.

K. Janković, Lj. Miličić, D. Bojović, Lj. Lončar, M. Stojanović

THE POSSIBILITY OF USING MINE TAILINGS AS A PARTIAL AGGREGATE REPLACEMENT

International Symposium and XXVI Congress DIMKS, Vrnjačka Banja, 2014, 131-136. In order to examine the differences in chemical composition and the possibility of using mine tailings in mortar and concrete production, samples were taken from the landfill and directly from the production. Material that was milled and met the criteria of SRPS B.C1.018 was used for the determination of pozzolanic activity. None of the samples showed pozzolanic activity. Because of that, this material cannot be used as a partial replacement for cement. In order to examine the possibility of using it as aggregate, mortar samples with 5% and 10% of 0/4 mm fractions replaced with tailings were made. Results of compressive and flexural strength were compared with the control mix. Keywords: tailings, aggregate, mortar.

D. Bojović, K. Janković, Lj. Lončar, M. Stojanović

COMPARATION OF NONDESTRUCTIVE AND DESTRUCTIVE TESTING OF CONCRETE FREEZE/THAW RESISTANCE WITH DE- ICING SALT

International Symposium and XXVI Congress DIMKS, Vrnjačka Banja, 2014, 177-182. Concrete resistance to frost action with and without the presence of de-icing salt (agent) is defined by many standards. According to SRPS U.M1.055 concrete is tested through exposure to traditional concrete cyclic freezing and thawing in the presence of salts (agent) after which the amount of scaled materials is measured. Non destructive testing is most often done by measuring the quantity, spacing factors and other properties of pores in the hardened concrete. Two types of concrete with different air content were tested. The aim of the paper is to compare test method with device Rapid Air 457 and classic tests performed 22 Institut za ispitivanje materijala a. d. Beograd on concrete. This paper is the product of real demand of a concrete producer who in early age of concrete wanted to know if the concrete was resistant to frost in the presence of salt. Keywords: freeze/thaw resistance, de-icing agent, pores, Rapid Air 457.

Pregled naučnih i stručnih rezultata u 2014. godini 23 SAOPŠTENJE SA MEĐUNARODNOG SKUPA ŠTAMPANO U IZVODU (M34)

M. Arsenović, L. Pezo, L. Mančić, Z. Radojević

ADVANCED OPTIMIZATION OF HEAVY CLAY PRODUCTS QUALITY BY USING ARTIFICIAL NEURAL NETWORK MODEL Serbian Ceramic Society Conference Advanced Ceramic and Application, Belgrade, 2014, 82. The effects of firing temperature (800–1100°C), chemical composition

(expressed in terms of the content of major oxides - SiO2, Al2O3, Fe2O3, CaO,

MgO, Na2O, K2O, MnO and TiO2), as well as several shape formats of laboratory brick samples on the final product quality were investigated. Prediction of the final laboratory products parameters was evaluated by second order polynomial regression models (SOPs) and artificial neural networks (ANNs), and afterwards both models were compared to one another and to experimental results. . Observed parameters of fired products that were determined in this study were: compressive strength (CS), water absorption (WA), firing shrinkage (FS), weight loss during firing (WLF) and volume mass of cubes (VMC). SOPs showed high r2 values (0.897 - 0.913 for compressive strength models, 0.942-0.962 for water absorption, 0.928 for firing shrinkage, 0.988-0.991 for water loss during firing and 0.941 for volume mass of cubes models). ANN model, coupled with sensitivity analysis, was obtained with high prediction accuracy: 0.866–0.939 for compressive strength models, 0.954–0.974 for water absorption, 0.882 for firing shrinkage, 0.982-0.988 for water loss during firing and 0.920 for volume mass of cubes models. The optimal samples chemical composition and firing temperature were chosen depending on a final usage of the raw material in heavy clay brick industry. Keywords: heavy clay products, prediction, optimization. 24 Institut za ispitivanje materijala a. d. Beograd

Ž. Sekulić, M. Kragović, A. Terzić, S. Mihajlović, V. Kašić, M. Petrović

PROPERTIES OF PORTLAND CEMENT WITH ADDITION OF PB- ZEOLITE Zeolite 2014, 9th International Conference of the Occurrence, Properties, and Utilization of Natural Zeolites, Belgrade, 2014, 211-212. It is well known that various materials that exhibit latent hydraulic properties can be used as SCM’s (Supplementary Cementitious Materials) in Portland cement (Opoczky and Beke 1967, Knape et al., 1967). The quantity of these SCM’s is strictly limited. The SCM’s which are often used in cement production are: composition by decreasing the calcium hydrate products and improving the chemical, acidic and sulphate stability. They can be milled before or milled together with the clinker. Zeolite may be considered as natural pozzolanic material in accordance with the (EN 197-1). Like other pozzolanic materials, being mixed with water, it does not harden, but if it is smoothly grinded it reacts in the presence of water at ambient temperature with the soluble hydroxide of calcium to form the silicates and aluminates of calcium, which are responsible for the increased hardness (Janotka and Krajci 2000). The aim of the present work is the investigation of the influence of the combination of the Pb-zeolites on the properties of Portland cement type PC42.5R-BFC. The aim of this investigation was to imitate the procedure of Pb removal from the water by application of zeolite. Namely, a question has been raised concerning possibility of reapplication contaminated filter, i.e. zeolite which has been saturated with lead. Keywords: zeolite, cements, reapplication.

A. Terzić, Z. Radojević, Lj. Miličić, N. Obradović, Lj. Andrić

CORUNDUM AND BAUXITE REFRACTORY SHOTCRETES BASED ON ACTIVATED WASTE COAL ASH: INVESTIGATION OF THERMALLY INDUCED PROPERTIES CHANGE Serbian Ceramic Society Conference Advanced Ceramic and Application III – New frontiers in multifunctional material science and processing, Belgrade, 2014, 70. Pregled naučnih i stručnih rezultata u 2014. godini 25

The necessity for application of activated secondary raw materials in refractory industry is caused by a growing demand for refractory castables with advanced properties and continuous technological evolution of high-temperature materials. In this investigation, refractory shotcretes with the same matrix composition were prepared from 15 wt.% of high aluminate cement and 45 wt.% of bauxite aggregate + 30 wt.% of chamotte filler, i.e. 75% of corundum aggregate. The request for obtaining a low-cement castable is fulfilled by application of 10 wt.% of mechanically activated coal ash as the cement substitution in the shotcretes. The ash was activated by means of various high energy mechano-activators. Results were compared in order to choose the most efficient activation procedure. The properties have been studied at temperatures ranging from room temperature to adopted maximal temperature 1400°C. Mechanisms of hydration and sintering were investigated by means of differential thermal analysis at three different heating rates. The measurements showed different activation energies for ordinary shotcretes and shotcretes with activated ash. The evolution of the refractory shotcretes properties was investigated and correlated to microstructural changes induced by temperature and microfiller addition. The combination of advantages in investigated refractory shotcretes makes them suitable for use in severe conditions at high temperature applications especially in refractory industries. Keywords: waste ash, ceramics, composites, refractories, ceramics, sintering, ecology.

Z. Radojević, I. Delić Nikolić, A. Terzić

CHARACTERIZATION OF MATERIAL AS A SUPPLY SOURCE FOR HERITAGE AQUEDUCT CONSTRUCTION IN FYR MACEDONIA Serbian Ceramic Society Conference Advanced Ceramic and Application III – New frontiers in multifunctional material science and processing, Belgrade, 2014, 69. Aqueduct which is situated in Skoplje, FYR of Macedonia represents an important archeological emplacement. Judging from the aspect of cultural heritage, but also from the aspect of material science, this historical site provides plenty of investigation material. It is not possible to determine the exact date of building of the aqueduct, due to the changes and reparation work performed on some parts of the structural elements. The condition of the 26 Institut za ispitivanje materijala a. d. Beograd aqueduct is adversely, namely, level of deterioration of some parts of the construction is high. This investigation was conducted as the initial stage of the restoration and renovation of the object. In this light, the first step was to mark sampling locations on the object and to sample characteristic brick specimens. Special attention was paid on avoiding of the additional damage of the monument. After sampling procedure, specimens were carefully preserved and prepared for further laboratory testing; by such making the investigation results as accurate as possible. Namely, precise results of the physical, mechanical, chemical and mineralogical properties give a closer insight to the structure of “old” brick material and enable to design “new material” with similar properties which would be applied in restoration process. Applied investigation is mostly engaged with textural characteristics because newly designed material that ought to replace original material built in the monument should aesthetically fit in the building conception and satisfy durability of this renovated heritage monument. Keywords: ceramic, brick, stone, textural properties, cultural heritage.

Pregled naučnih i stručnih rezultata u 2014. godini 27 RAD U VODEĆEM ČASOPISU NACIONALNOG ZNAČAJA (M51)

M. Vasić, Z. Radojević

PRIKAZ STANDARDA SRPS EN 15037-3 – ZAHTEVI I KARAKTERISTIKE BLOKOVA OD GLINE ZA MEĐUSPRATNE KONSTRUKCIJE Izgradnja, 2014, Vol. 68, No. 8-9, 9-12. Pored klasičnih nenosećih blokova, prepoznatljivih na našem tržištu, ovaj standard prepoznaje i polunoseće odnosno noseće blokove za međuspratne i krovne sisteme konstrukcija. U radu su predstavljeni zahtevi i osnovni kriterijumi u pogledu osobina koje moraju da ispune svi tipovi blokova od gline, namenjenih za ugradnju u međuspratnim konstrukcijama, a koji su definisani standardom SRPS EN 15037-3. Najvažnije karakteristike kvaliteta su: geometrijske i površinske karakteristike, mehanička čvrstoća, bruto zapremiska masa u suvom stanju i vlažno širenje. Proizvođači moraju kontinuirano dokazivati kvalitet proizvoda što podrazumeva da u svojoj tehničkoj dokumentaciji imaju dokumentovane podatke o: gemetrijskim karakteristikama, klasi proizvoda, savojnoj i pritisnoj čvrstoći, otpornosti prema požaru, akustičkim, termičkim osobinama, trajnosti i drugim zahtevima. Keywords: SRPS EN 15037-3, blokovi od gline za međuspratne konstrukcije.

Z. Radojević, A. Terzić, M. Vasić

OPTIMIZACIJA I PROJEKTOVANJE TENISKE ŠLJAKE OD ŠKARTA PEČENIH OPEKARSKIH PROIZVODA Izgradnja, 2014, Vol. 68, No. 8-9, 31-38. U ovom radu je istraživano ponašanje teniske šljake od škarta pečenih opekarskih proizvoda i izvršena je optimizacija fizičko-mehaničkih performansi. Svojstva mešavina sa različitim koncentracija otpada su dobijena pomoću standardnih laboratorijskih ispitivanja. U cilju optimizacije performansi šljake ispitivana su sledeća svojstva: početna vlažnost svake mešavine, uticaj različitih spoljnih faktora kao što je sušenje i mržnjenje i određena je 28 Institut za ispitivanje materijala a. d. Beograd ravnotežna vlažnost mešavina. Praćeni su procesni parametari i promene svojstava mešavina značajnih za process proizvodnje novog finalnog proizvoda - umešavanje, sušenje i pakovanje. Na kraju su prikazani najvažniji zaključci ovog istraživanja. Keywords: šljaka, opeka, optimizacija, svojstva..

M. Vasić, Z. Radojević

OPIS TRANSPORTA VLAGE TOKOM IZOTERMSKOG SUŠENJA OPEKARSKIH PROIZVODA Izgradnja, 2014, Vol. 68, No. 8-9, 64-69. U poslednjih tridesetak godina objavljeno je više radova čiji je glavni cilj bio određivanje efektivnog koeficijeta difuzije i opis kinetike sušenja čvrstih i poroznih materijala. Iako su u literaturi pojedinačno detaljno opisani svi potencijalno mogući transportni procesi i mehanizmi koji se javljaju tokom sušenja sve do sada nije postojalo sveobuhvatno objašnjenje koje bi ih sve objedinilo a kamoli prepoznalo kada se koji mehanizam javlja tokom procesa izotermskog sušenja opekarskih proizvoda. Upravo ovaj rad je pruža odgovore na prethodna pitanja.. Keywords: izotermsko sušenje, efektivni koeficijent difuzije, kinetika sušenja, porozni materijali.

M. Vasić, Z. Radojević

ISPITIVANJE ŠIRENJA POD DEJSTVOM VLAGE NA DOMAĆIM OPEKARSKIM PROIZVODIMA Izgradnja, 2014, Vol. 68, No. 8-9, 83-87. U radu je dat prikaz ispitne metode za određivanje širenja pod dejstvom vlage obuhvaćene standardom SRPS EN 772-19. Za potrebe ove analize korišćeni su uzorci opeka, šupljih blokova od gline i šupljih blokova od gline za međuspratne konstrukcije različitih domaćih proizvođača. Izabrane su po dve analize iz svake grupe proizvoda. Iz svake analize je izdvojeno i pripremljeno po šest uzoraka. Na pripremljenim uzorcima je izvršeno ispitivanje širenja pod dejstvom vlage. Rezultati su pokazali da postoje razlike u vrednosti širenja pod Pregled naučnih i stručnih rezultata u 2014. godini 29 dejstvom vlage kako u okviru grupa tako i između grupa. Kod većine ispitanih uzoraka vrednosti širenja pod dejstvom vlage su bile manje od 0,5 mm/m. Ove vrednosti širenja pod dejstvom vlage su u slučaju sprečenog širenja uzroci pucanja proizvoda. Keywords: širenje pod dejstvom vlage, opekarski proizvodi.

30 Institut za ispitivanje materijala a. d. Beograd SAOPŠTENJE SA SKUPA NACIONALNOG ZNAČAJA ŠTAMPANO U CELINI (M63)

M. Arsenović, L. Pezo, Z. Radojević

UTICAJ RASPODELE VELIČINE ČESTICA OPEKARSKIH SIROVINA NA PLASTIČNOST, SUŠENJE I OSOBINE SUVIH OPEKARSKIH PROIZVODA Izgradnja, 2014, Vol. 9-10, 59-63. Cilj ovog istraživanja je definisanje uticaja raspodele veličine čestica opekarskih sirovina na oblikovanje (vlaga oblikovanja, koeficijent plastičnosti), osetljivost na sušenje (gubitak mase u kritičnoj tački prema Bigo krivi) i osobine suvih opekarskih proizvoda (čvrstoća pri pritisku i skupljanje u sušenju). Zaključeno je da, među analiziranim opekarskim sirovinama, statistički značejne uticaje (na nivou p < 0,1 i pri poverenju od 95 %) ima količina frakcije gline, pri čemu je dejstvo najveće na plastičnost, zatim osetljivost u sušenju i skupljanje u sušenju. Skupljanje u sušenju i plastičnost su pokazali najveću zavisnost od sadržaja karbonata. Na osnovu korelacija i analize glavnih komponanta (PCA) utvrđeno je da su karbonati konsituenti sve tri prou;avane frakcije, i da sadržaj glinovite frakcije najviše utiče na čvrstoću pri pritisku suvih šupljih blokčića. Ključne reči: raspodela veličine čestica, opekarski proizvodi, oblikovanje i sušenje.

M. Arsenović, L. Pezo,, Z. Radojević

OPTIMIZACIJA PROCESA PEČENJA I KVALITETA PROIZVODA METODOM ODZIVNE POVRŠINE Izgradnja, 2014, Vol. 9-10, 70-75. Reprezentativnoj glini, koja pripada najplastičnijim (NPL), su dodavane dve umereno plastične sirovine (UP1 i UP2) u različitim odnosima. Ispitivan je uticaj različitih procesnih parametara pri proizvodnji opeke, kao što su temperatura pečenja (900-1100°C) i količina umešavanih opekarskih sirovina (u rasponu od 0-10%), na kvalitet proizvoda. Razvijeni su matematički modeli za Pregled naučnih i stručnih rezultata u 2014. godini 31 predviđanje čvrstoće pri pritisku, upijanja vode, skupljanja pri pečenju, gubitka mase tokom pečenja i zapreminske mase. Modeli su pokazali prilično visoke vrednosti r2 (0,703 - 0,994). Optimalni uslovi su određeni metodom odzivne površine (RSM), korišćenjem algoritma sintetičke fazi evaluacije (FSE), uz pomoć trapezoidne funkcije pripadnosti. Na osnovu laboratorijskih ispitivanja, za optimalne parametre je utvrđen dodatak 0-2% UP1 i 8-10% UP2, pri pečenju na 900oC, što se pokazalo najpogodnije za proizvodnju šupljih blokova. Ključne reči: predviđanje, optimizacija, procesni parametri, opeka, metoda odzivne funkcije.

Z. Radojević, M. Arsenović, A. Terzić

PROUČAVANJE PRIRODE I UZROKA POJAVE NETIPIČNIH DEFEKATA NA POVRŠINI KERAMIČKIH PROIZVODA Izgradnja, 2014, Vol. 9-10, 88-93. Reprezentativnoj glini, koja pripada najplastičnijim (NPL), su dodavane dve umereno plastične sirovine (UP1 i UP2) u različitim odnosima. Ispitivan je uticaj različitih procesnih parametara pri proizvodnji opeke, kao što su temperatura pečenja (900-1100°C) i količina umešavanih opekarskih sirovina (u rasponu od 0-10%), na kvalitet proizvoda. Razvijeni su matematički modeli za predviđanje čvrstoće pri pritisku, upijanja vode, skupljanja pri pečenju, gubitka mase tokom pečenja i zapreminske mase. Modeli su pokazali prilično visoke vrednosti r2 (0,703 - 0,994). Optimalni uslovi su određeni metodom odzivne površine (RSM), korišćenjem algoritma sintetičke fazi evaluacije (FSE), uz pomoć trapezoidne funkcije pripadnosti. Na osnovu laboratorijskih ispitivanja, za optimalne parametre je utvrđen dodatak 0-2% UP1 i 8-10% UP2, pri pečenju na 900oC, što se pokazalo najpogodnije za proizvodnju šupljih blokova. Ključne reči: predviđanje, optimizacija, procesni parametri, opeka, metoda odzivne funkcije. 32 Institut za ispitivanje materijala a. d. Beograd

M. Vasić, Z. Radojević

PRIKAZ PROMENA NASTALIH U NAJNOVIJIM IZDANJIMA STANDARDA EN 539-2, EN 1024 I EN 1304 International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD) 1341-1349. U radu su u kratkim crtama iznete najnovije promene u važećoj regulativi EU koja pokriva oblast ispitivanja crepova od gline namenjenih za preklopno polaganje kao i crepova i fazonskih komada od betona namenjenih za pokrivanje krovova i oblaganje zidova. Direktiva CPD 89/106/EEC i Uredbe P6-TA (2009)0320 i 305/2011 regulišu oblast usaglašenosti plasmana građevinskih konstrukcionih materijala na teritoriji zemalja članica evropske zajednice. U proteklom periodu, doneti su harmonizovani evropski standardi za većinu građevinskih proizvoda, obezbeđen je visok stepen ujednačenosti kvaliteta proizvoda i predviđeni su različiti nivoi odnosno klase perfomansi građevinskih proizvoda. Upravo i najnovije izmene standarda se odnose na tačke standarda koje su u direktnoj vezi sa direktivom EU za građevinske proizvode, naročito po pitanju reakcije na dejstvo požara i ispuštanja opasnih materija. Keywords: Direktiva CPD 89/106/EEC, EN 539-2,EN 1024,EN 490 i EN 491.

Lj. Andrić, A. Terzić, M. Petrov, Lj. Pavlović, Lj. Miličić

POBOLJŠANJE FIZIČKO-HEMIJSKIH SVOJSTAVA LETEĆEG PEPELA POMOĆU MEHANIČKE AKTIVACIJE International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD) 889-896. U ovom radu su prikazani eksperimentalni rezultati pokušaja unapređenja reaktivnosti letećeg pepela variranjem fizičko-hemijskih svojstava i mehaničkih karakteristika. Za potrebe istraživanja, uzorci letećeg pepela su podvrgnuti proceduri mehaničke aktivacije pomoću vibracionog, planetarnog i standardnog mlina sa kuglama. Leteći pepeo je detaljno analiziran, a naročito u aktiviranom stanju. Određeni su: specifična površina; granulometrijski sastav inicijalnog i aktiviranog uzorka; gustina i druga svojstva. Kako bi se potpuno sagledao Pregled naučnih i stručnih rezultata u 2014. godini 33 process i fenomeni koji se dešavaju pri aktivaciji pepela, neophodno je razumeti teorijske principe aktivacije. Ključne reči: Leteći pepeo; mehanička aktivacija; ponovna upotreba; građevinski materijali.

A. Terzić, Lj. Andrić, M. Petrov, Lj. Miličić, Z. Radojević, Lj. Pavlović

ODRŽIVA REŠENJA ZA REAPLIKACIJU LETEĆEG PEPELA POSTIGNUTA KROZ PROCES MEHANIČKE AKTIVACIJE 9. Simpozijum Reciklažne tehnologije i održivi razvoj, Zaječar, 2014, 167-173. Cilj istraživanja je bio da se pronađe održivo rešenje za reaplikaciju letećeg pepela poreklom iz uglja povećanjem reaktivnosti uz pomoć mehano aktivacije. Da bi se proces aktivacije potpuno sagledao neophodno je razumeti teorijske principe na kojima se zasniva rad aktivatora. U eksperimentu je korišćen vibracioni mlin. Karakteristike aktiviranog pepela i mogućnost merenja inercije zrna pomoću automatskog brojača zrna su analizirani. Na osnovu predložene hipoteze rada ABZ, energija i svojstva zrna su uslovljeni delovanjem mehaničke sile i izražavaju se u obliku promene inercije zrna. Pepeo koji je upotrebljen u eksperimentu je detaljno analiziran popoću XRD i SEM metoda. Konačni rezultat je bilo uspostavljanje gornje granice aktivacionog perioda. Ključne reči: pepeo iz uglja; konverzija energije; vibracioni mlin; aktivacija.

J. Smiljanić, D.A. Marković

SMANJENJE EMISIJE SLOBODNOG FORMALDEHIDA IZ VEZIVA KOJA SE KORISTE U PROIZVODNJI PLOČA NA BAZI DRVETA 51. Savetovanje Srpskog hemijskog društva, Niš, 5-7. jun 2014, 52–57. Ovim radom se stavio akcenat na pregled veziva koja se koriste u proizvodnji ploča na bazi usitnjenog drveta, kao i na veziva koja bi mogla ući u upotrebu zbog svog ekološkog značaja. Formaldehid se u velikoj meri koristi za proizvodnju sintetičkih veziva, reakcijom fenola, uree i melamina. UF - urea – formaldehidno vezivo je najviše korišćeno vezivo, posebno u proizvodnji ploča na bazi drveta. Za proizvodnju kompozitnih materijala na bazi drveta se koriste veziva na bazi formaldehida, 34 Institut za ispitivanje materijala a. d. Beograd

čija kasnija emisija dovodi do ozbiljnih zdravstvenih problema. Formaldehid predstavlja najveću brigu, proteklih godina, jer je njegova emisija i kontrola emisije u vazduhu zatvorenog prostora važan faktor u rešavanju ekoloških i zdravstvenih problema, u smislu da je formaldehid opasan po zdravlje i glavni uzročnik iritacije respiratornih organa, dermatoloških problema, kao i uzročnik pojave kancera. Ključne reči: emisija formaldehida, sadržaj formaldehida, vezivo, fenol, formaldehid, urea, melamin, ploče na bazi drveta.

Pregled naučnih i stručnih rezultata u 2014. godini 35

T 152 T 152 COMPOSITE KOMPOZITNI MATERIALS MATERIJALI

36 Institut za ispitivanje materijala a. d. Beograd SAOPŠTENJE SA MEĐUNARODNOG SKUPA ŠTAMPANO U CELINI (M33)

Lj. Miličić, A. Mitrović, M. Zdujić, D. Nikolić

STRENGTHS OF THE MORTARS CONTAINING AMORPHOUS KAOLIN AS CEMENT REPLACEMENT MATERIAL 5th International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD), 971-976. The amorphous kaolin, obtained by mechanochemical treatment of kaolinite clay, was used as cement replacement material in the mortars. Technology for obtaining amorphous kaolin was developed in IMS institute with the goal to produce new pozzolanic material which satisfies technical, ecological and economical requirements for supplementary cementitous materials. Main advantages of amorphous kaolin are high pozzolanic activity of 14 MPa, high specific surface area of 21.75 m2/g, and mean particle size of 6.35 g/cm3. In order to verify its behaviour in mortars flow, density in the fresh and hardened state, flexural and compressive strengths obtained after 28 day of air-curing or autoclaving were determined. Compressive strengths, especially those obtained on autoclaved samples, indicates possibility of 50% cement reduction in mortars. To optimize possible cement replacement ratio hidrated lime or water glass must be added to the mix to surpass deficit in calcium hydrohide (lime) available to react with pozzolan. Keywords: Amorphous kaolin; mortars; strength.

A. Mitrović, Lj. Miličić, M. Zdujić AMORPHOUS KAOLIN AS CEMENT REPLACEMENT MATERIAL International Conference Contemporary Achievements in Civil Engineering 2014, Subotica, 24 and 25th of April 2014, 483-488. Searching for lower cost building materials with lower environmental impact, researchers from Institute IMS made a new pozzolanic material „amorphous kaolin“ (AK). AK, has high pozzolanic activity of 14 MPa and high specific surface area of 21.75 m2/g. In order to verify its application as cement Pregled naučnih i stručnih rezultata u 2014. godini 37 replacement material in mortars, effects of many factors, such as AK replacement of cement, W/b ratio, addition of hydrated lime or water glass, and curing regime were investigated. Keywords: Pozzolans, amorphous kaolin, mortars, strength.

38 Institut za ispitivanje materijala a. d. Beograd SAOPŠTENJE SA MEĐUNARODNOG SKUPA ŠTAMPANO U IZVODU (M34)

Lj. Miličić, A. Mitrović, M. Zdujić, D. Nikolić

STRENGTHS OF THE MORTARS CONTAINING AMORPHOUS KAOLIN AS CEMENT REPLACEMENT MATERIAL International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD) 971-976. The amorphous kaolin, obtained by mechanochemical treatment of kaolinite clay, was used as cement replacement material in the mortars. Technology for obtaining amorphous kaolin was developed in IMS institute with the goal to produce new pozzolanic material which satisfies technical, ecological and economical requirements for supplementary cementitous materials. Main advantages of amorphous kaolin are high pozzolanic activity of 14 MPa, high specific surface area of 21.75 m2/g, and mean particle size of 6.35 g/cm3. In order to verify its behaviour in mortars flow, density in the fresh and hardened state, flexural and compressive strengths obtained after 28 day of air-curing or autoclaving were determined. Compressive strengths, especially those obtained on autoclaved samples, indicates possibility of 50% cement reduction in mortars. To optimize possible cement replacement ratio hidrated lime or water glass must be added to the mix to surpass deficit in calcium hydrohide (lime) available to react with pozzolan. Keywords: Amorphous kaolin; mortars; strength.

Pregled naučnih i stručnih rezultata u 2014. godini 39

T 220 T 220 CIVIL ENGINEERING, GRAĐEVINARSTVO, HYDRAULIC ENGINEERING, HIDRAULIKA, OFFSHORE TECHNOLOGY, PRIOBALNA SOIL MECHANICS TEHNOLOGIJA, MEHANIKA TLA 40 Institut za ispitivanje materijala a. d. Beograd RAD U VRHUNSKOM MEĐUNARODNOM ČASOPISU (M21)

D. Berisavljević, Z. Berisavljević, V. Čebašek, N. Šušić

CHARACTERISATION OF COLLAPSING LOESS BY SEISMIC DILATOMETER Engineering Geology, 2014, Vol.181, 180-189. Structural collapse and sudden volume changes represent a major geotechnical issue, particularly in loess soils. There are different criteria for assessing collapse potential based on laboratory test results, which require the collectionof undisturbed samples from test pits. This can be a complicated and costly procedure, often financially unjustified for smaller projects. This paper presents the results of seismic dilatometer tests (SDMT) performed at a single location in a loess soil in Belgrade, in addition to the results of single oedometer collapse tests performed on high quality samples from test pits. After comparing laboratory test results it was possible to determine that in samples collected from boreholes, dry unitweight is approximately 20% higher than in block samples taken fromtest pits,while moisture content is between 1 and 4% higher. Unitweight estimated from DMT is on average 15% higher than the unit weight obtained from block samples.

The constrained modulus (MDMT) determined by DMT are highly compatiblewith oedometer modulus (Eoed) obtained from samples at natural moisture content. This paper presents two possible ways of identifying collapsing loess based on intermediate DMT parameters and the ratio of

G0/MDMT.

The tests results indicate that if the ratio between the material index (ID) and the horizontal stress index (KD) is greater than 5, the danger of collapse is imminent. Simultaneous observation of the changes of ID and KD with depth on a semi-log graph in the same scale is recommended. In thisway the relative distance between themmay be clearly noticed; the larger the distance becomes, the greater the risk of collapse. In the collapsing loess ratio G0/MDMT is found to be higher than 21 for KD less than 0.6,while in non-collapsing loess G0/MDMT Pregled naučnih i stručnih rezultata u 2014. godini 41 is less than 21 for higher values of KD. In terms of DMT, loess is considered as underconsolidated soil, which is one of the most common “definitions” of loess. Keywords: loess, collapse, constrained modulus, intermediate parameters, seismic dilatometer.

42 Institut za ispitivanje materijala a. d. Beograd RAD U ISTAKNUTOM MEĐUNARODNOM ČASOPISU (M22)

J. Ćirilović, N. Vajdić, G. Mladenović, C. Queiroz

DEVELOPING COST ESTIMATION MODELS FOR ROAD REHABILITATION AND RECONSTRUCTION - CASE STUDY: PROJECTS IN EUROPE AND CENTRAL ASIA ASCE Journal of Construction Engineering and Management, 2014, Vol. 140, Issue 3, 04013065. This paper presents the development of prediction models for the unit costs of road works that could be applied to strategic planning of road works at the network level. A specialized data set was used, which was generated under a World Bank study that included 200 road work contracts from 14 countries in Europe and Central Asia (ECA) and signed between 2000 and 2010. Two techniques were used for model development: multiple regression analysis and artificial neural networks. Classification trees were used as an intermediate step to evaluate the correctness of the selected parameters. A total of 19 variables, divided into three groups (oil-price related, country-related, and project-related variables), were tested for their influence on unit cost of asphalt concrete (AC) and road rehabilitation and reconstruction (RRR) costs. The analysis results showed that the level of corruption and the economic environment in a country have a significant effect on both costs of AC and RRR. The resulting models could be particularly useful for the planning and optimization of work on road networks in ECA countries. However, the approach and methodology used for model developments may be applied generally Keywords: construction costs; maintenance costs; reconstruction; rehabilitation; neural networks; correlation; regression analysis; regression models; highways and roads; statistics; cost and schedule.

Pregled naučnih i stručnih rezultata u 2014. godini 43 RAD U MEĐUNARODNOM ČASOPISU (M23)

Z. Berisavljević, D. Berisavljević, V. Čebašek

SHEAR STRENGTH PROPERTIES OF DIMITROVGRAD FLYSCH, SOUTHEASTERN SERBIA Bulletin of Engineering Geology and the Environment, 2014. DOI: 10.1007/s10064-014-0678-5 Flysch deposits are common in Serbia. Approximately 15 % of the 250 km of highways currently under construction will be constructed in flysch. In the most southern part of the E80 project, close to the border crossing with Bulgaria, construction of 3-km long cuts, often over 30 mhigh, is foreseen by the design. The geology of this part of Serbia is mainly characterized by flysch deposits represented by a sequence of sandstone and siltstone, interchanging in different proportions. After excavation of a majority of the cuts, several slopes suffered from global and structural instabilities. This required re-design of one part of the cuts. For this purpose, a geological strength index (GSI) was estimated and the structural features of rock discontinuities were observed on the faces of the surface excavations. This information and data obtained from laboratory testing enabled the determination of five characteristic rock mass types. For every type, shear strength properties were determined based on three criteria: the Hoek– Brown failure criterion; the Mohr–Coulomb criterion; and an hyperbolic nonlinear envelope. During the process of converting the Hoek–Brown parameters to the parameters of hyperbolic envelope, the Levenberg–Marquardt algorithm (LMA) was utilized to solve for the nonlinear regression problem. Verification of the parameters was performed on several examples. The median angle pressure increases exponentially with the GSI value and ranges between the value characteristic for clays and well-graded gravel. The maximum angle difference is obtained for a GSI value of 30. The average normal effective stress acting on the failed slopes, expressed in the form of the stress level ratio (SLR), is below 0.5. This indicates that the curved part of the shear strength envelope is utilized during the shearing. As such, the linear segment overestimates the shear strength. Keywords: road cut, GSI, shear strength, nonlinear envelope.

44 Institut za ispitivanje materijala a. d. Beograd RAD U ČASOPISU MEĐUNARODNOG ZNAČAJA (M24)

K. Đoković, D.Rakić, M. Ljubojev

ESTIMATION COMPACTION PARAMETERS OF SOIL BASED ON ATTERBERG LIMITS Journal of Mining and Metallurgy Engineering, Bor, 2014, Vol. 4/2013, 1-8. This paper presents relationship between the Atterberg limits and soil compaction parameters obtained correlation- regression analysis. The relations between the liquid limit wl, the plastic limit wp, maximum dry density dmax and optimum moisture content wopt are obtained based on the results of laboratory tests measured on a large number of samples of clay core earthfill dams Rovni, Selova, Prvonek and Barje. The regression and correlation analysis were obtained empirical equations and diagrams. Based on the equations can estimate the value of the optimum moisture content and maximum dry density of knowledge of Atterberg limits of plasticity. Keywords: compaction parameters, maximum dry density, optimum moisture content, Atterberg limits, liquid limit, plastic limits, regression analysis.

Pregled naučnih i stručnih rezultata u 2014. godini 45 SAOPŠTENJE SA MEĐUNARODNOG SKUPA ŠTAMPANO U CELINI (M33)

M. Prica, K. Đoković, N. Šušić, D. Berisavljević

APPLICATION THE SCREW PLATE LOAD TEST (SPLT) TO DETERMINING GEOTECHNICAL PARAMETERS OF SOILS International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD) 1873–1879. The screw plate load test is one of the in-situ tests for the estimation of geotechnical parameters of soils. The screw plate is basically a single cycle of a spiral auger, which is inserted into the soil medium and successfully carried out in the test boreholes over 2 m deep. Equipment for performing this test were designed and made in the IMS Institute in accordance with the requirements defined by the Russian standard GOST 20276-99.This paper presents an overview of our experience in conducting screw plate load tests. To our knowledge, no such tests have been carried out in our region before. Keywords: screw plate, in situ tests, modulus of deformation.

K. Đoković, J.Ćirilović, N. Šušić, G. Hadži-Niković

APPLICATION OF REGRESSION ANALYSIS FOR PREDICTION OF COMPACTION PARAMETERS OF CLAY SOILS 4th Simposium of Macedonian Association for Geotechnics, Struga, Macedonia, 2014, 169-176. The paper presents an application of regression analysis for the estimation of the compaction parameters (maximum dry density MDD and optimum moisture content OMC) from index properties of the soils: liquid limit LL, plastic limit LP and plasticity index PI, obtained through Atterberg’s test. The data collected from laboratory tests measured on representative samples of clay from core of earthfill dams Rovni, Selova, Prvonek and Barje, were used for the estimation of soil compaction parameters. The resulting models can be used to estimate compaction parameters: (i) in the preliminary stages of the project development, 46 Institut za ispitivanje materijala a. d. Beograd or (ii) in course of the preliminary assessment of suitability of a material from borrow pits for use in earthfill structures.

Key words: maximum dry density, optimum moisture content, liquid limit, plastic limits, regression analysis.

M. Prica, K. Đoković, N. Šušić, D. Berisavljević

SOME EXPERIENCE IN PERFORMING IN SITU TEST SCREW PLATE LOAD TEST (SPLT) 4th Simposium of Macedonian Association for Geotechnics, Struga, Macedonia, 2014, 217-222. This paper presents an overview of our experience in conducting screw plate load tests. The screw plate load test is a field test for determining deformation properties of soils. Unlike the “classical” tests using a circular plate which can be performed on terrain surfaces only, the screw plate load test can be successfully carried out in the test boreholes over 2 m deep. Keywords: screw plate, in situ tests, modulus of deformation.

G. Hadži-Niković, L. Čaki, K. Đoković

THE FITTING PARAMETER K FOR PREDICTING UNSATURATED SHEAR STRENGTH FOR LOESS SEDIMENTS IN BELGRADE AREA 4th Simposium of Macedonian Association for Geotechnics, Struga, Macedonia, 2014, 259-266. There are several semi-empirical shear strength equations in the literature to predict the shear strength of unsaturated soils which use the soil-water characteristic curve - SWCC- and effective shear strength parameters c’ and ’, but some of them need the fitting parameter K . There is relationship between the fitting parameter K and index plasticity Ip, in the literature, obtained on the basis of the available experimental results on statically compacted specimens. However, it is usefull and recommended to check validity of that relatioship and determine the fitting parameter K in all special case. In this study the fitting parameter K was determined for unsaturated loess soils of Belgrade sediments at Pregrevica location, obtained from results of experimentaly testing. The Pregled naučnih i stručnih rezultata u 2014. godini 47 presented results are consistent with the earlier proposed K vs Ip relationship and confirm the importance of experimental testing for correct using proposed relationship. Keywords: the fitting parameter, unsaturated shear strength, matric suction, loess sediments, SWRC.

D. Rakić, N. Šušić, I. Basarić, K. Đoković, D. Berisavljević

LOAD TEST OF LARGE DIAMETER PILES FOR THE BRIDGE ACROSS DANUBE RIVER IN BELGRADE XV Danube – European Conference on Geotechnical Engineering DECGE 2014, Vienna, Austria, 2014, Paper No. 111, 867-872. The bridge over the Danube will be part of the so-called north main tangent - NMT as one of the most important elements of the future road and street network base in Belgrade. It will be the second bridge over the Danube in Belgrade. In this paper the results of the pile load tests for the central bridge structure foundation will be analysed, using the EC 7 standard. The length of the test pile was 46 m and its diameter was 2.0 m. Load test was carried out with the contra load of 2100 tons in the form of pre-stressed reinforced concrete beam, which is founded on piles, each about 60 m. For the realization of a vertical pressing force to the pile head, five hydraulic presses were used, that were securing the force from 3000 to 6000 kN. Keywords: pile, static pile load test, EC 7 standards, geotechnical conditions.

N. Šušić, M. Živanović

COMPARATIVE ANALYSIS OF REINFORCED CONCRETE (RC) RETAINING WALL UNDER SEISMIC AND NON-SEISMIC CONDITIONS 4th International Conference Earthquake Engineering and Engineering Seismology, Bor, 2014, 383-388. Retaining walls are civil engineering structures erected for the purpose of securing a terrain de-leveling, thus enabling unobstructed traffic flow, existence of free/buffer spaces between buildings, warehouses, etc. Retaining walls are 48 Institut za ispitivanje materijala a. d. Beograd usually dimensioned to satisfy stability requirements in case of active earth pressure action. In such cases, irrational and cost ineffective structures are designed only too often. This paper demonstrates that, when a retaining wall is dimensioned to satisfy also the stability requirements in case of earthquake, the result is an even more irrational and cost ineffective support structure. Keywords: retaining wall, analysis, seismic and non-seismic conditions.

J.Ćirilović, G. Mladenović, C. Queiroz

PROJECT LEVEL PAVEMENT MANAGEMENT OPTIMIZATION PROCEDURE COMBINING OPTIMAL CONTROL THEORY AND HDM-4 MODELS Transportation Research Arena, Paris, France, 2014. The paper presents an optimal control theory-based procedure for finding the optimal timing and intensity of pavement maintenance treatments, which was adjusted based on the models for pavement deterioration and road user costs from the HDM-4 and RUCKS models. The model for improvement in pavement condition after a maintenance treatment was calibrated according to Paterson’s bilinear model. The closed-form solution is then compared to the solution obtained by using genetic algorithms (GAs). In both methodologies special attention was given to the quality of the “optimal” solution in terms of evaluating: (i) the time between the maintenance treatments; (ii) minimal/maximal thicknesses of overlays calculated in the optimal maintenance plan; and (iii) parameters defining pavement condition before and after the maintenance treatment. The comparison between the two methodologies allowed analyzing limitations in each one of them and led to improvements in the “optimal” solution. Keywords: optimal pavement maintenance plan, optimal control theory, genetic algorithms, HDM-4; RUCKS. Pregled naučnih i stručnih rezultata u 2014. godini 49

J.Ćirilović, G. Mladenović, C. Queiroz

APPLICATION OF GENETIC ALGORITHMS FOR PAVEMENT MAINTENANCE OPTIMIZATION International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD). Finding the optimal pavement maintenance strategies is one of the key problems in the field of Road Infrastructure Management. This paper shows an example of the methodology for solving the above-mentioned optimization problem using genetic algorithms (GA). Four models were calibrated: (i) the model estimating the effects of maintenance treatments; (ii) pavement deterioration model; (iii) model estimating the maintenance cost; and (iv) road users cost estimation model, and the advantages and disadvantages of the use of the method of GA are highlighted. Keywords: optimal pavement maintenance plan, genetic algorithms, HDM-4.

G Mladenović, J. Ćirilović

PERMANENT DEFORMATION OF RUBBER MODIFIED ASPHALT MIXTURES International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD). Increasing traffic loading, as well as increasing summer extreme temperatures reinforce the focus on the demands for quality and durability of asphalt pavements. At the same time, the focus is directed to sustainable development, use of waste materials and saving of natural resources. The study included testing of five asphalt mixtures with neat and modified bitumen, with two different contents of ground rubber and rubber modifier. Mixture with neat bitumen B 50/70 showed the lowest resistance to permanent deformation, while the mixtures with addition of rubber showed superior performance, even compared with the mixtures with polymer modified bitumen. Keywords: asphalt mixtures, rubber, permanent deformation.

50 Institut za ispitivanje materijala a. d. Beograd RAD U ČASOPISU NACIONALNOG ZNAČAJA (M52)

N. Šušić, G. Hadži-Niković G., K. Đoković

BEARING CAPACITY OF PILES ESTIMATE DIFFERENCES Journal of Faculty of Civil Engineering, special edition International Conference Contemporary Achievements in Civil Engineering E.III, 2014, 259- 264. Methods that have been used in determining the bearing capacity of piles are not entirely reliable given the variability of the parameters involved. Most of the methods used are based on theoretical models of the lowest reliability degree. Pile loading tests give a more realistic idea of the pile behaviour under load. In addition, ultimate bearing capacity obtained by pile loading test may be used to calculate the allowable loading intensity at a reasonable factor of safety.

Keywords: piles, bearing capacity of pile, theoretical model, pile loading test.

Pregled naučnih i stručnih rezultata u 2014. godini 51

T 230 T 230 BUILDING CONSTRUCTION VISOKA GRADNJA 52 Institut za ispitivanje materijala a. d. Beograd SAOPŠTENJE SA MEĐUNARODNOG SKUPA ŠTAMPANO U CELINI (M33)

D. Stanojlović

ANALYSIS OF THE SUCCESS OF MASS CONSTRUCTION PROJECTS IN VIEW OF COST DISTRIBUTION 14th Conference of the Association of Structural Engineers of Serbia, Novi Sad, 2014, 245–252. This paper analyses the relation of cost distribution and success of construction projects by testing the rule of thumb: successful projects have ¼ of costs placed in the first third, ½ of the costs in the second, and remaining ¼ of the costs placed in the last third of the project. Hypothesis has been tested at 88,64% construction projects within Stepa Stepanović Complex, Belgrade. The results of research have shown a strong negative correlation among the percent of cost in the second third of the project and the delay in its execution. Likewise, there is a strong negative correlation between the percent of cost in the first and last third of the project. Keywords: “the rule of thumb”, cash flow, cost distribution, Stepa Stepanović.

G. Petrović, B. Ivanković

THE APPLICATION OF THE IMS BUILDING TECHNOLOGY IN THE XXI CENTURY International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD) 533-540. IMS Building Technology is an advanced system for industrialized building, based on prefabricated reinforced concrete elements, assembled using post- tensioning. It has been in use since 1957 in former Yugoslavia and worldwide, enabling the construction of contemporary-designed residential buildings. Through the joint effort of all the parties involved in future projects, it is possible to implement the IMS Building Technology and improve the overall quality and affordability of housing. Pregled naučnih i stručnih rezultata u 2014. godini 53

Keywords: Industrialization of building, IMS Building Technology, prestressing, prefabrication.

G. Petrović, M. Aleksendrić

THE IMPACT OF SMART HOME TECHNOLOGIES ON ARCHITECTURAL DESIGN 1st International Academic Conference On Architecture, Belgrade, 3-4 April 2014, (CD) 822-829. The house is a machine for living. Technological development changes our homes, as they need to accommodate various advanced systems for management of lighting, heating, ventilation and air conditioning, surveillance and security, shading, multimedia entertainment, all aiming to provide both comfort and energy savings. An architect today should at least be acquainted with the multidisciplinary approach to designing a smart space. Domotics is not the option to automatically perform certain functions in space, it is the ability to control the space itself, with all the amenities that this approach offers. The role of an architect in this case is double: To inform the client of the possibilities that the system offers and to give the system designer sufficient information about the client’s needs. Therefore, the role of an architect is central and crucial: Although both the user’s demands and the smart technology are changing rapidly, he still has to be the intermediary between the world of users and the world of technology. And still, new technologies serve to improve the overall quality of the designed space, not vice versa. Keywords: Home Automation, Domotics, Habitation, Interior Design, Energy Efficiency.

54 Institut za ispitivanje materijala a. d. Beograd RAD U ČASOPISU NACIONALNOG ZNAČAJA (M52)

G. Petrović, N. Milovanović

RECENT RESEARCH WORK RESULTING IN IMS BUILDING TECHNOLOGY IMPROVEMENTS Sixt edition of the research conference on civil engineering, economy of constructions, architecture, urban planning and territorial development, Bucharest, 2013, published in Constructii, 2014, Vol.14, No. 2, 21-24. IMS Building Technology is based on prefabricated concrete elements of the structure, assembled on-site and joined using prestressing. This construction method, developed in 1950s and implemented worldwide, is still in use. This paper describes recent improvements and the research work that initiated and enabled them, as well as on-site experiences from the process of implementation. Keywords: industrialization of building, IMS Building Technology, prestressing, prefabrication.

Pregled naučnih i stručnih rezultata u 2014. godini 55

T 450 T450 METAL TECHNOLOGY, TEHNOLOGIJA METALA, METALLURGY, METALURGIJA, METAL PRODUCTS PROIZVODI OD METALA

56 Institut za ispitivanje materijala a. d. Beograd RAD U ISTAKNUTOM MEĐUNARODNOM ČASOPISU (M22)

A. S. Tawengi, A. Sedmak ,V. Grabulov

COLD WELD CRACKING SUSCEPTIBILITY OF HIGH STRENGTH LOW ALLOYED (HSLA) STEEL NIONIKRAL 70 Metallurgy, 2014, Vol. 53, No 4, 624-626. In view of the importance of high strength low alloy (HSLA) steels, particularly for critical applications such as offshore plat forms, pipeline and pressure vessels, this paper reports on an investigation of how to weld this type of steel without cold cracking. Using manual metal arc welding process and Tekken test (Y - Grove test) has been carried out both to observe the cold cracking phenome non, and to investigate the influencing factors, such as preheating temperature and energy input, as well as electrode strength and diameter. How ever the results of the experiments show that there is a risk of cold cracking. Keywords: HSLA steel; weld metal; cold cracks; hardness; Heat Affected Zone (HAZ).

M. Burzić, M. Manjgo, J. Bernetič, Z. Burzić, M. Arsić

EFFECT OF VARIABLE LOAD ON CRACK INITIATION MICROALLOYED STEEL S 690 - QL Metallurgy, 2015, Vol. 54, No. 1, 55-58. The accumulation of damage in the form of initiation and growth of microcracks is the first stage of destruction that ends when the merger microcracks form macro cracks. Cracks formed in the cycle number N =104 - 105 are the result of low cycle fatigue. From the need to evaluate low cycle fatigue life was carried out to investigate the low cycle fatigue microalloyed high-strength steel S690QL in the heat-treated. Keywords: microalloyed steel S690QL, low cycle fatigue, cracks, strain amplitude.

Pregled naučnih i stručnih rezultata u 2014. godini 57 RAD U MEĐUNARODNOM ČASOPISU (M23)

D. Veljić, A. Sedmak, M.Rakin, N.Bajić, B.Međo, D. Bajić, V. Grabulov

EXPERIMENTAL AND NUMERICAL THERMO - MECHANICAL ANALYSIS OF FRICTION STIR WELDING OF HIGH - STRENGTH ALLUMINIUM ALLOY Thermal Science, 2014, Vol. 18, Issue Supplement, S29 - S38. DOI REFERENCE: 10.2298/TSCI130512171V This paper presents experimental and numerical analysis of the change of temperature and force in the vertical direction during the friction stir welding of high-strength aluminium alloy 2024 T3. This procedure confirmed the correctness of the numerical model, which is subsequently used for analysis of the temperature field in the welding zone, where it is different to determine the temperature experimentally. 3D finite element model is developed using the software package Abaqus; arbitrary Lagrangian-Eulerian formulation is applied. Johnson-Cook material law and Coulomb's Law of friction are used for modelling the material behaviour. Temperature fields are symmetrical with respect to the welding line. The temperature values below the tool shoulder, i. e. in the welding zone, which are reached during the plunge stage, are approximately constant during the entire welding process and lie within the interval 430-502 °C. The temperature of the material in the vicinity of the tool is about 500 °C, while the values on the top surface of the welding plates (outside the welding zone, but close to the tool shoulder) are about 400 °C. The temperature difference between the top and bottom surface of the plates is small, 10-15 °C. Keywords: friction stir welding, aluminium alloys, finite element analysis, temperature fields, thermo-vision measurement. 58 Institut za ispitivanje materijala a. d. Beograd

I. Radisavljević, A. Živković, N. Radović, V. Grabulov

INFLUENCE OF PIN GEOMETRY ON MECHANICAL AND STRUCTURAL PROPERTIES OF BUTT FRICTION STIR WELDED 2024-T351 ALUMINUM ALLOY Hemijska industrija, 2014, Vol. 68. DOI:10.2298/HEMIND131206020R The aim of this work was to investigate the combined effect of small difference in pin geometry, together with rotation and welding speed on the weldability, mechanical and structural properties of FSW 2024-T351 Al plates. The only difference in tool pin design was the shape of thread: regular and rounded. Specimens were welded using rotation rate of 750 rev/min and welding speeds of 73 and 93 mm/min. In all four cases, specimens were defect free, with good or acceptable weld surface. Modification in pin design showed strong influence on macro structure and hardness distribution. Weak places are identified as low hardness zone, close to the nugget zone and are in good agreement with fracture location in tensile testing. Weld efficiency, as a measure of weld quality, are better in case of 310 tool, while UTS values can differ up to 13% for the equal welding parameters. Therefore, it can be assumed that small modification in tool design, particularly in pin geometry, can have great influence on weld formation and mechanical properties. Keywords: Friction Stir Welding, pin geometry, weld quality, Al alloy 2024, heat input.

M. B. Đurđević, S. Manasijević, Z. Odanović, N. Dolić

QUANTIFICATION OF THE COPPER PHASE(S) IN AL-5SI-(1-4)CU ALLOYS USING A COOLING CURVE ANALYSIS Materiali in tehnologije, 2014, Vol. 48, No. 2, 299-304. The aim of this paper is to demonstrate that it is possible to characterize the development and quantify the area percentage of Cu-enriched phases in Al-5Si- (1-4)Cu alloys by applying a cooling-curve analysis. It is shown that several distinct Cu-enriched phases are manifested as peaks on the first derivative of the cooling curve. The total area percentage of the Cu-enriched phases is defined as the ratio of the area between the first derivative of the cooling curve and the Pregled naučnih i stručnih rezultata u 2014. godini 59 hypothetical solidification path of the Al-Si-Cu eutectic to the total area between the first derivative of the cooling curve and the base line. These calculations, based on the cooling curve analyses, are compared with the image- analysis and chemical-analysis results in order to verify the proposed method. There is a good correlation between the measured and calculated values for the area of the Cu-rich phase in Al-5Si-(1–4)Cu alloys.

Keywords: aluminum alloys, thermal analysis, cooling-curve analysis, image analysis.

M. B. Đurđević, Z. Odanović

ANALYSIS OF THE SOLIDIFICATION PATH OF AL-SI9-CU(1-4) ALLOYS USING THERMAL ANALYSIS TECHNIQUE La Metallurgia Italiana, 2014, Vol. 106, No. 9, 23-29. The present work displays the potential of cooling curve analysis to characterize the solidification path of Al-Si9-Cu(1-4) alloys. In additions the possibility of quantifying the Cu enriche phases in these alloys by using thermal analysis (TA) technique has been investigated. The proposed methodology is based on the following procedure: a total amount of the Cu enriched phases is defined as the ratio of the area between the first derivative of the cooling curve and the hypothetical solidification path of the Al-Si-Cu eutectic to the total area between the first derivative of the cooling curve and the base line. These calculations based on the cooling curve analyses are compared with Image Analysis (IA) and chemical analysis results in order to verify the proposed method. There is a good correlation between measured and calculated values for the area of Cu rich phase of the Al-Si9-Cu(1-4) alloys. Keywords: Al alloys - Cu rich phase - Thermal analysis - Thermal freezing range.

60 Institut za ispitivanje materijala a. d. Beograd RAD U ČASOPISU MEĐUNARODNOG ZNAČAJA (M24)

M. Arsić, S. Bošnjak, V. Grabulov, A. Veljović, Z. Savić

ANALYSIS OF CURRENT STATE AND INTEGRITY EVALUATION FOR THE SUPPLY TANK OF GENERATION UNIT 6 OF THERMAL POWER PLANT NIKOLA TESLA ”A” Advanced Materials Research, 2014, Vol. 1029, 14-19. DOI:10.4028/www.scientific.net/AMR.1029.14 Stable supply tank, with volume V = 250 m3 and operating pressure p = 1,5 MPa, of generation unit 6 at thermal power plant 'Nikola Tesla A' in Obrenovac is designed for water-steam working fluid. It was made of steel Č 1204 as a single-part welded structure with a single wall. Cylindrical tank shell consists of 8 segments, while torispherical deep bottoms consist of 3 segments. The tank is in the horizontal position and it lays on 4 supports. There are five manometers installed at the tank for pressure control, as well as 5 spring-loaded safety valves. In this paper results of non-destructive tests performed on the tank are presented. Mechanical damages on parent material, up to 1.5 mm deep, were detected at the outer surface of the cylindrical section of the right bottom (as seen from the boiler) and on the inner surface of the shell, as well as sporadic pitting corrosion, up to 0.5 mm deep, and 2 mm misalignment of sheet metals in areas where shell segments are joined. Crack type linear indications were detected on the surface of welded joints by magnetic particle testing. By ultrasonic and radiographic testing it was determined that the homogeneity of welded joints is satisfactory. Hardness testing was performed on all segments of the tank, and obtained values were in the range between 118 and 130 HB. On the basis of test results the repair technology for shell and bottom segments was made, while on the basis of the analytical calculation of tank strength the integrity evaluation was carried out for the upcoming period of service, depending on the category of the vessel. Keywords: supply tank, tests, damage repair, strength calculation, integrity evaluation. Pregled naučnih i stručnih rezultata u 2014. godini 61

M. Arsić, B. Vistać, S. Bošnjak., V. Grabulov, Z. Savić

METHODOLOGY FOR REPARATION OF DAMAGED SLEEVES AND WELDED SHIED SECTIONS OF GUIDE VANES AT HYDROPOWER PLANT DJERDAP 1 Advanced Materials Research, 2014, Vol. 1029, 8-13. DOI:10.4028/www.scientific.net/AMR.1029.14 Vertical Kaplan turbines, manufactured in Russia and with nominal power of 200 MW, have been installed in 6 hydroelectric generating units at ’Djerdap 1’. During the refurbishment of hydropower plant experimental non-destructive tests were performed in order to determine the state of turbine components. During the course of testing damage was detected at sleeves and welded shields of guide vanes, which occurred as a consequence of turbine shaft vibrations. 1782 mm long guide vane sleeves were made of cast steel 25L (GOST standard), 260 mm long sleeve was made of forged steel St 25 (GOST standard), while welded shields of guide vanes were made of austenitic steel 08X18H10T (GOST standard). Results of experimental tests and methodology for reparation of damaged surfaces of sleeves and welded shields of guide vanes are presented in this paper. It was necessary, due to the structural solution used for the design of guide vanes and their function during service, to define a large number of details, carefully reconsider them and carry out all activities with extreme care in order to enable the safe operation and continuous use of vanes through the use of reparation methodology for welding/surface welding of sleeves and welded shields. Overlooking, underestimation or incorrect perception of important details could cause significant problems during turbine operation. Keywords: hydro turbine, crank, sleeve, damage, reparation methodology.

D. Momčilović, A. Subić, I. Atanasovska, R. Mitrović

COMBINED LOAD SIMULATION VS. COMPONENT LOADS SIMULATION IN MACHINE DESIGN – A CASE STUDY FME Transactions, Vol. 42, No. 1, 2014, 48-55. 62 Institut za ispitivanje materijala a. d. Beograd

At a present level af technology, almost all machine parts are subjected to combined loads in real working condition. The aim of research described in this paper is to highlight the importance of combined load simulation for the calculation of machine parts load capacity. This research is inspired by one failure case study of hydro turbine shaft. The shaft with flange and high ratio of shaft/flange diameter is the subject of excessive calculation in order to find the cause of failure. The classic analytical calculation of this shaft uses the Peterson's elastic stress concentration factor and calculates stress concentration factors and maximum stresses for different stress components of combined load and then calculate analytical values of total stress by the hypothesis of maximum normal stress. On the other hand, presented Finite Element Analysis simulates shaft stress state under real conditions of complex load by simultaneously applying all load components (bending, torsion and tension). Bboth of the calculations are performed for few different radii in shaft-flange sections. The results are presented by comparative diagrams for obtained values of total stresses and stress concentration factors. The analysis of these diagrams leads to conclusion that the use of Peterson’s stress concentration factors and standard analytical techniques for total stress calculation has to be replaced with modern calculation techniques that provide a more accurate, easier-to-handle solution. Keywords: stress concentration factor, Finite Element Analysis, shaft.

Pregled naučnih i stručnih rezultata u 2014. godini 63 PREDAVANJE PO POZIVU SA MEĐUNARODNOG SKUPA ŠTAMPANO U CELINI (M31)

V. Grabulov

THE METHODOLOGY OF EVALUATING OF LOADING RATE EFFECT ON FRACTURE RESISTANCE OF HIGH STRENGHT STEELS AND THEIR WELDMENTS VIth International Metallurgical Congress Ohrid 2014, May 29 – June 01, 2014, Ohrid, FYR Macedonia, CD, 1-6. The application of high strength steels is limited by their formability. The most often used method of forming of these steels is welding. Thus, the application of high strength steels for welded structures depends, besides other factors, on properties of their welded joints. One of the most important requirements for service safety of welded structures, produced of high strength steel, is to achieve corresponding level of toughness in all three welds constituents: base metal (ΒΜ), weld metal (WM) and heat affected zone (ΗΑΖ). The evaluation of welds toughness is very complex, because of microstructures heterogeneity of WM and ΗΑΖ, as well as the heterogeneity of their mechanical properties. Charpy test, although very old method is generally accepted for the evaluation of the impact toughness due to its simplicity. Recently developed instrumentation of Charpy test significantly extended its capacity, enabling not only the separation of energy portions required for crack initiation and crack propagation, but also the evaluation of loading during the fracture process. Specifications for heavy loaded welded structures normally include impact energy values for ΒΜ and WM, as well as transition temperature when service at low temperature is expected. However, there is still the problem how to evaluate toughness of ΗΑΖ, since it is difficult to position notch root precisely in ΗΑΖ region of lowest toughness. In order to establish more severe testing loading, explosion crack starter test had been introduced. Applied to welded joint specimens, this test enables to determine the most critical region in welds, in which fracture would occur. On this way by the global test critical local property could be defined. Further improvement in crack resistance testing is offered by introduction of fracture mechanics tests, which involved pre-cracked 64 Institut za ispitivanje materijala a. d. Beograd specimens. The application to welded joints allows for convenient determination of crack resistance of BM and WM, but it is followed again by uncertainty in defining of critical crack tip position in HAZ, since in prescribed preparing method fatigue crack would follow the path of notch root rather than direction of critical HAZ region. The application of all three above described methods for the evaluation of brittle behavior of welded joints, performed of high strength pressure vessels and ship buildings steels and their weldments welded by manual arc welding process, are presented in the paper. Keywords: Brittle behavior, transition temperatures, crack initiation, crack propagation, explosive bulge test.

Pregled naučnih i stručnih rezultata u 2014. godini 65 SAOPŠTENJE SA MEĐUNARODNOG SKUPA ŠTAMPANO U CELINI (M33)

M. Arsić, M. Mladenović, Z: Kovačević, Z. Savić, Z. Šarkoćević

ANALYSIS REGARDING THE CAUSES OF DAMAGE OCCURRENCE AT RUNNER BLADES AND RUNNER SHIELD OF HYDROELECTRIC GENERATING SET A6 AT HPP DJERDAP 1 VIth International Metallurgical Congress Ohrid 2014, May 29 – June 01, 2014, Ohrid, Republic of Macedonia, CD, 1-5. Vertical Kaplan turbines, manufactured in Russia and with nominal power of 200 MW, have been installed in 6 hydroelectric generating units at ’Djerdap 1’. Most of the parts were made of materials in accordance with GOST and ASTM standards. During the refurbishment of hydroelectric generating unit A6 the analysis of current state and integrity evaluation were performed for 2 runner blades and runner shield at which damage that has to be repaired was detected, because hydroelectric generating sets are being projected for the service life of 40 years due to structural solutions and limited possibilities of performing periodic inspections. Runner blades were, according to the Manufacturer’s documentation, made of steel 08H14NDL, while runner shield was made of steel St3/0H13, in accordance with GOST standard. Stresses in components and structures of turbine and hydro mechanical equipment occur during the process of fabrication and assembly of equipment (residual stresses), during the process of performing functional tasks in exploitation (stationary and dynamic loading) and during the disturbed process of exploitation (non stationary dynamic loading). With unpredictable influence of corrosion, erosion and cavitation also taken into account, it is clear that it’s not a simple task to determine causes of damage occurrence at some components and structures. This paper contains results of non-destructive tests, as well as of metallographic examination, based on which it was determined that the cause of damage occurrence at 2 runner blades and runner shield is the intrusion of a foreign body of unknown origin during turbine operation. Keywords: hydroelectric generating set, damage, runner blades, runner shield. 66 Institut za ispitivanje materijala a. d. Beograd RAD U VODEĆEM ČASOPISU NACIONALNOG ZNAČAJA (M51)

M. Rakin, B. Medjo, M. Arsić, Ž. Šarkoćević, A. Sedmak

EFFECT OF EXPLOITATION CONDITIONS AND FLAW GEOMETRY ON THE LOAD CARRYING CAPACITY OF CASING PIPES FOR OIL DRILLING RIGS Key Engineering Materials, 2014, Vol. 601, 65-70. DOI:10.4028/www.scientific.net/KEM.601.65 The subject of this work is examination of API J55 steel casing pipes manufactured by high frequency (HF) contact welding. Since the pipes were withdrawn after about 70 000 hours of service in an oil drilling rig, the influence of the exploitation conditions on the material properties is determined. Experimental analysis includes tensile, impact toughness and fatigue testing of the specimens cut from the exploited pipe and the new pipe manufactured from the same-grade material. Additionally, pipe with flaws (stress concentrators) is tested by subjecting to internal pressure. The analysed stress concentrators represent defects which are often found in the exploitation: localized corrosion damages (corrosion pits). They were simulated by machining on the external surface of the pipe wall. The behavior of the pipes with these defects is determined by strain measurement and finite element analysis in software package Abaqus. The dimensions of the defects are varied, in order to determine the dependence of load carrying capacity on their depth and length. Several expressions from the literature are applied for estimation of the maximum pressure in damaged pipelines, and the solutions are compared with the predictions of finite element models. Additionally, triaxiality values at the bottom of the defects are compared with those obtained on tensile specimens, having in mind the key role of this parameter in ductile fracture initiation. Keywords: Casing pipes, Properties degradation, Integrity assessment, Stress concentrator, Finite element method. Pregled naučnih i stručnih rezultata u 2014. godini 67

M. Arsić, B. Međo, V.Grabulov, Z. Savić, N. Milovanović

POSSIBILITIES OF PERFORMING ANALYSIS AND ENHANCING THE RELIABILITY OF WELDED STRUCTURES OF TURBINE AND HYDROMECHANICAL EQUIPMENT OF THE HYDRO POWER PLANT DJERDAP ON THE BASIS OF FAULT TREE ANALYSIS Energija (Energija, ekonomija, ekologija), 2014, Vol. 16, No. 1-2, 377-384. Hydro power plant ’’Djerdap 1’’ comprises 6 hydroelectric generating sets with vertical Kaplan turbines. Nominal output power of each is 200 MW. Hydro power plant ’’Djerdap 2’’ comprises 10 hydroelectric generating sets with horizontal Kaplan turbines. Nominal output power of each is 28 MW. All of the mentioned equipment has been fabricated in Russia. During the refurbishment of hydroelectric generating sets A4 and A6 at the hydro power plant ’’Djerdap 1’’, non-destructive and destructive tests were performed in order to analyze the state and evaluate the reliability of welded structures, as well as in order to determine causes of degradation of base material and welded joints of structures of turbine and hydromechanical equipment. Welded structures of turbine shafts at the hydro power plant ’’Djerdap 2’’ were also tested. The qualitative and quantitative analysis of failures of welded structures that occur due to conditions of fabrication and/or exploitation was performed through the use of the fault tree method, which is based on results of destructive and non-destructive tests. Analysis of individual influences showed that failure of welded structures of turbine and hydromechanical equipment is mainly influenced by the selection of base material and welding technology, wrong method of calculation and shaping of structures, as well as deviation from projected conditions of exploitation (loads, vibrations, corrosion, erosion, cavitation...). Fault tree analysis results could be used for failure prevention and reliability enhancement, because the method relies on diagnostic descriptions of logistic relations between undesired events. Key words: hydroelectric generating set, welded structure, fault tree, reliability, database.

68 Institut za ispitivanje materijala a. d. Beograd

M. Arsić, B.Vistać, S. Bošnjak, M. Mladenović, Z. Savić

ANALYSIS OF CURRENT STATE AND INTEGRITY EVALUATION FOR THE AIR TANK OF THE REGULATION SYSTEM OF TURBINE A6 AT HYDROPOWER PLANT DJERDAP 1 Energija (Energija, ekonomija, ekologija), 2014, Vol. 16, No. 1-2, 385-391. Vertical Kaplan turbines with nominal power of 200 MW, made in Russia, have been installed at 6 hydroelectric generating sets of ’’Djerdap 1’’. Most of the components were made of steel in accordance with GOST and ASTM standards. During the rehabilitation of the hydroelectric generating set A6 non- destructive testing methods were performed on parent material and welded joints of the main oil/air tank and air tank with the auxiliary oil/air tank, which acts as pressure accumulator in the regulation system, in order to carry out the analysis of the current state and integrity evaluation for the regulation system of the turbine. Shells of all 3 tanks were made of steel Č 1205, while bottoms were made of russian steel St 20K. Tests were also performed on pipeline elements (pipes and elbows). The results of non-destructive tests performed on air tank are presented in this paper. Mechanical damages were detected by visual inspection at parent material of the shell and at the upper bottom, as well as discontinuous and incompletely welded joints on the inside and outside of the tank. Surface linear crack type indications were detected through magnetic particle testing at intersections of welded joints on the inside of the tank. Internal crack type defects were detected through ultrasonic testing of welded joints On the basis of test results the technology of reparatory welding / surface welding of parent material and welded joints was created, while on the basis of the analytical calculation of tank strength the evaluation of its integrity for the following 40 years of operation was obtained. Keywords: air tank, tests, damage repair, strength calculation, integrity.

Pregled naučnih i stručnih rezultata u 2014. godini 69 TEHNIČKA I RAZVOJNA REŠENJA (M80)

D. Veljić, N. Radović, M. Rakin, I. Radisavljević, A. Živković, V. Grabulov

TEHNOLOGIJA ZAVARIVANJA PLOČA DEBLJINE 3.0 mm ALUMINIJUMSKE LEGURE 2024 POSTUPKOM ZAVARIVANJA TRENJEM ALATOM Projekat Ministarstva nauke TR 34018, Razvoj tehnologije proizvodnje i zavarivanja Al-Mg legura visoke čvrstoće za primenu u konstrukcijama drumskih i železničkih transportnih sredstava, Korisnik: GOŠA FOM, Prihvaćeno od: GOŠA-FOM, 2014.

70 Institut za ispitivanje materijala a. d. Beograd

Pregled naučnih i stručnih rezultata u 2014. godini 71

B 003 B 003 ECOLOGY EKOLOGIJA 72 Institut za ispitivanje materijala a. d. Beograd SAOPŠTENJE SA MEĐUNARODNOG SKUPA ŠTAMPANO U CELINI (M33)

T. Spasojević-Šantić, G. Dražić, D. Perović

PHYTOREMEDIATION OF AGRICULTURAL LAND CONTAMINATED WITH PESTICIDES Ecological improvement of devastated sites for sustainable development ECOIDS 2014, Belgrade, 2014. Pesticides are substances intended for preventing, destroying, suppressing or reducing pests. They are in use for more than 60 years and they are divided according to purpose, chemical composition and toxicity category. The use of pesticides in agriculture has positive and negative sides, both from an economic as well as a social and environmental point of view. It is known that pesticides through biogeochemical cycles mature to all environmental media, and even the food chain, which explicitly has an impact on human health. Phytoremediation is one of the natural methods used for solving the problem of the presence of pesticides in agricultural soils, using plant species that perform stabilization and degradation of pesticides. During the planning ecoremediation project of degraded agricultural land, selection of phytoremediation techniques depends on many factors, among other things, the types of contaminants and plant species that will be used. After examining the results of some studies, reports, and regulations, this paper shows the importance of phytoremediation of degraded agricultural land in the light of affordable and green technology without negative effects and products on the environment and human health as well as appropriate techniques of modern man who seeks to sustainable development. It is necessary to take into consideration the use of biopesticides as alternatives to current trend of uncontrolled use of conventional pesticides. Keywords: pesticides, phytoremediation, sustainable development.

Pregled naučnih i stručnih rezultata u 2014. godini 73

P 420 T 150 PETROLOGY, PETROLOGIJA, MINERALOGY, MINERALOGIJA, GEOCHEMISTRY GEOHEMIJA 74 Institut za ispitivanje materijala a. d. Beograd RAD U ČASOPISU MEĐUNARODNOG ZNAČAJA (M24)

S. Dević,M.Cocić

MINERALOGICAL INVESTIGATIONS IN METALLURGY AS A CINTRIBUTION TO THE AFIRMATION OF INDUSTRIAL MINERALOGY IN SERBIA Materials protection, 2014, Vol. 55, No.4. Industrial mineralogy is a part of mineralogy dealing with natural and synthetic minerals, raw materials, secondary raw materials, polymineral materials that originated from the production processes, etc. As applicable, it has been used in the refractories industry, ceramics industry, ferrous and non-ferrous metallurgy, cement industry and other industries. The work aimed at presenting its contribution to the affirmation of industrial mineralogy in Serbia through the results of mineralogical investigations obtained in ferrous metallurgy and copper metallurgy. A larger number of mineralogical investigations, carried out on the materials being characteristic for metallurgical processes and issues of ferrous metallurgy and copper metallurgy, have been stated in this work. Refractory bricks, various types of slag, final flotation waste, copper concentrate, etc. have been investigated. At the same time, the reasons and objectives of performed mineralogical investigations have been given. The results of mineralogical investigations have been shown in detail on two examples. The first are associated with the problems and material in ferrous metallurgy and the second with the material and problems in copper metallurgy. Firstly, the results of mineralogical investigations of casting powders have been shown. They have been investigated for verification of the quality and erosion of the alumographite entry nozzles, that occurred due to their effect. The investigations aimed at increasing the durability (resistance) of the alumographite entry nozzles being utilized in the process of continuous casting of steel. By increasing the durability of entry nozzles the production costs are reduced. The method of X-ray diffraction analysis (XRPD) has been used for investigating the mineralogical composition of casting powders. The results of studying the process of copper concentrate roasting in the fluo-solid reactor have been shown in the second example, with the aim of investigating the Pregled naučnih i stručnih rezultata u 2014. godini 75 transformation degree of the primary ore minerals under various technological parameters.The input material (charge) and roasting products in the reactor (calcine) were investigated by various methods.The investigation results have shown that reactions of mineral transformations are not completed, i.e. they are developing only partially (12-22%), which is the consequence of insufficiently long heating, unsuitable temperature or unfulfilled other parameters, such as for example, a non-uniform grain size. All stated mineralogical investigations and the results shown in this work gave a significant contribution to the affirmation of industrial mineralogy in Serbia. Keywords: Mineralogical investigations, Metallurgy, Industrial mineralogy.

76 Institut za ispitivanje materijala a. d. Beograd SAOPŠTENJE SA MEĐUNARODNOG SKUPA ŠTAMPANO U CELINI (M33)

L. Kurešević, I. Delić-Nikolić, O. Vušović

THE POSSIBILITY OF USE OF TALAMBAS VOLCANITES AS A BUILDING STONE International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD). In the process of expanding the raw materials base of Republic Serbia, it is necessary to explore the new localities along with the ones already explored. Volcanic rocks of Talambas in central Serbia are for the first time covered by exploration works on the level of regional prospecting. Aiming to determine the possibility of use of this rock as a building stone for architectural and technical purposes, we have collected the rock-mass samples and examined them in the laboratory. Results of these examinations have shown that this stone can be used as the technical building stone, but not as an architectural stone, despite the relatively favourable results of physico-mechanical properties testing. Keywords: building stone, Talambas (central Serbia), trachy-basalt.

O. Vušović, L. Kurešević, I. Delić-Nikolić

CONTRIBUTION TO RECONSTRUCTION OF IMMOVABLE CULTURAL HERITAGE "SUVAČA" (KIKINDA, SERBIA) International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD). During the works on restoration of dry mill, the only preserved dry mill powered by horse-labour in Serbia, we have examined three submitted samples. Dry mill consists of three connected parts – drive section, milling area and the miller's apartment. The samples were taken from the rammed-earth wall, the plaster wall and attic spindle. This paper presents the test results and conclusions. Keywords: restoration, dry mill, examinations. Pregled naučnih i stručnih rezultata u 2014. godini 77

O. Vušović, L. Kurešević, I. Delić-Nikolić

STONE MATERIALS USED FOR BUILDING OF THE AQUEDUCT IN VIZBEGOVO, SKOPJE, MACEDONIA 26th International symposium on researching and application of contemporary achievements in civil engineering in the field of materials and structures, Vrnjаčkа Bаnjа, 2014. In Vizbegovo near Skopje is situated an aqueduct made of stone and brick, 16.5 m high and 386 m long. The examination of the stone materials in situ has shown that among the most often used rock types are travertine, sandstone, schist and marble. Other rock types are less often used. For the purpose of the reconstruction of the aqueduct, the IMS Institute expert team has taken the samples of the most often used rock types. These samples have been tested in the stone and aggregate laboratory of the IMS Institute in Belgrade. The samples have been used for the petrographic examination and physical properties testing. Durability of the used rock types has also been examined. This paper presents the examination results and conclusions based on them. Keywords: aqueduct, Vizbegovo, stone.

S. Dević, S. Erić, M. Cocić,

ELECTRON MICROSCOPY IN THE FUNCTION OF DETERMINING THE MINERALOGICAL CHARACTER OF CLAY International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD). For comprehensive characterization of clay the determining of mineralogical character of clay is unavoidable. Other clay properties depend on the chemical and mineralogical composition of clay, and altogether determine clay quality and its applicability. Electron microscopic analysis is one of the methods of mineralogical characterization. The results of the electron microscopic testing of several types of clay are presented in the study. The results showed the presence of plates and sheets form in clays and layered structure. These forms and structure are the characteristics of the mineral Kaolinite. The spectrums of the points of those forms confirm that they belong to the mineral Kaolinite. The mineralogical character of the tested clays is Kaolinitic. 78 Institut za ispitivanje materijala a. d. Beograd

Keywords: clay, electron microscopy, mineralogical, minerals.

S. Dević, S. Erić

ELECTRON MICROSCOPIC ANALYSIS OF THE LOESS AND METALLIC FRAGMENTS OF BRICK CLAY International Conference Civil Engineering – Science and Practice, Žabljak, Montenegro, 17-21 February 2014, (CD) 1821-1828. This study presents the electron microscopic analysis of the loess and metallic fragments being present in some brick clays. The loess fragments from three deposits of brick clays and metallic fragments from one deposit have been analyzed. The analysis results showed the structure of the loess and metallic fragments, fragment forms, chemical composition of the selected forms, similarities and differences of the fragment forms. The loess fragments from different clay deposits differ according to structure and forms. They partially differ in the chemical and mineral composition. Keywords: loess fragments, strukture, forms.

M. Cocić, M. Logar, B. Matović, S. Dević, T. Volkov-Husović, S. Cocić

FINAL FLOTATION WASTE KINETICS OF SINTERING XXII International Conference Ecological Truth Eco-Ist 14, Bor, 2014, 204- 208. In the copper extraction, especially during the process of flotation enrichment and the pyrometallurgical processing, the waste materials are being generated that represent huge polluters of environment. Deposits of final flotation waste (FFW) and discarded slag from the smelting furnaces transform large areas into degraded soil and they represent permanent source of water and air polltion.To discuss the application of FFW in the manufacturing new materials from the glass-ceramic group, were examined thermal properties whose knowledge is necessary usage in the production of glass-ceramic. The paper presents the examination of konetocs of sintering FFW by measuring the change of sample contraction over time in cinsequence heating on thermo microscope. Pregled naučnih i stručnih rezultata u 2014. godini 79

Keywords: Final flotation waste, kinetics of sintering, glass- ceramic, application.

S. Dević, M. Cocić, S. Erić

ELECTRONIC MICROANALYSIS AS A SUPPLEMENT TO ZEOLITE CHARACTERIZATION WITH THE VIEW OF MORE HETEROGENEOUS AND MORE SUCCESSFUL APPLICABILITY 46th International October Conference on Mining and Metallurgy IOC 2014, Bor, 2014, 354-357. The aim of this work was to supplement the mineralogical characterization of zeolite from localities near Vranje (deposits of zeolite tuffs) by the application of electronic microanalysis and obtained results. It has been determined by previously performed mineralogical investigations by using X-ray diffraction analysis, Optical microscopy and Differential thermal analysis that the mineral Clinoptilolite forms the base of zeolite tuffs and that its content in them reaches 90%. Zeolites from the same locality have been investigated by electronic microanalysis and the obtained results served for supplementing the characterization of zeolite, for more diverse and more successful applicability of the same. Keywords: zeolite, electronicmicroanalysis, Clinoptilolite, mineralogical characterization .

80 Institut za ispitivanje materijala a. d. Beograd RAD U VODEĆEM ČASOPISU NACIONALNOG ZNAČAJA (M51)

L. Kurešević, S. Dević

GEMSTONE SILICA VEINS IN KREMENJAČA VOLCANIC ROCKS (SERBIA) Geologica Macedonica, 2014, Vol. 28, No. 1, 33-38. The Ješevac volcanic complex located in central Serbia is made up of various Tertiary volcanic rocks. Kremenjača hill is situated on the SW rim of the Ješevac volcanic complex. Silica veins found in this site are made up of chalcedony varieties and crystalline quartz. Jasper veins are examined more thoroughly in this paper. Microscopic analysis has shown it is made up of cryptocrystalline silica with fluidal structure. X-ray powder diffraction analysis of the samples has shown crystalline silica – quartz, ruling out the presence of amorphous silica – opal. The results of spectrochemical analysis have indicated the presence of colouring agents originating mostly from ultramafic and mafic rocks. Keywords: gemstone, silica veins, jasper, dacite.

Pregled naučnih i stručnih rezultata u 2014. godini 81 SAOPŠTENJE SA SKUPA NACIONALNOG ZNAČAJA ŠTAMPANO U CELINI (M63)

O. Vušović, I. Delić-Nikolić, L. Kurešević

OCENA STANJA KAMENA NA FASADI ZGRADE GENERALŠTABA U BEOGRADU Međunarodna konferencija Savremena dostignuća u građevinarstvu, Subotica, 2014. Zgrada Generalštaba je građena u periodu od 1956. do 1965. godine. Korišćeni su varijeteti kamena "Veselje unito" i "Koral", po sastavu organogeni krečnjaci, mezozojske starosti. Zgrada je ozbiljno oštećena tokom bombardovanja 1999. godine. U radu je prikazana ocena stanja kamena koji je ugrađen u fasadu ovog objekta. Ključne reči: generalštab, krečnjak, ocena stanja.

O. Vušović, I. Delić-Nikolić, L. Kurešević

PRILOG ISTRAŽIVANJU I ISPITIVANJU ISTORIJSKIH MALTERA – MALTER UGRAĐEN U AKVADUKT U VIZBEGOVU, SKOPLJE, MAKEDONIJA 26. Mеđunаrоdni simpоziјum о istrаživаnјimа i primеni sаvrеmеnih dоstignućа u grаđеvinаrstvu u оblаsti mаtеriјаlа i kоnstrukciја, Vrnjаčkа Bаnjа, 2014. Akvadukt u Skoplju izgrađen je od kamena i opeke, koji su povezani malterom. Za potrebe sanacije ovog objekta, stručni tim Instituta IMS izvršio je uzimanje uzoraka maltera sa akvadukta u cilju ispitivanja njihovog sastava, fizičkih i mehaničkih karakteristika. Ispitivanje je uključilo mikroskopsko, spektroskopsko (XRF), mineraloško (XRD) ispitivanje, određivanje zapreminske mase, upijanja vode i pritisne čvstoće. U radu će biti prikazani rezultati ispitivanja i izvedeni zaključci. Ključne reči: malter, akvadukt, ispitivanje.

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Pregled naučnih i stručnih rezultata u 2014. godini 83

DOCTORAL DISSERTATIONS DOKTORSKE DISERTACIJE 84 Institut za ispitivanje materijala a. d. Beograd

L. Kurešević

POTENCIJALNOST TERCIJARNIH MAGMATSKIH KOMPLEKSA VARDARSKE ZONE SRBIJE SA ASPEKTA ARHITEKTONSKOG GRAĐEVINSKOG KAMENA Univerzitet u Beogradu, Rudarsko-geološki fakultet, Beograd, 2014. U sastavu Vardarske zone, jedne od tektonski najsloženijih oblasti Balkanskog poluostrva, u čijem domenu se odvijalo otvaranje i zatvaranje okeanskih prostora i subdukcija koja je dovela do intenzivne magmatske aktivnosti pretežno tokom tercijara, danas se nalazi veći broj magmatskih kompleksa. U ovoj disertaciji su obrađene geološke karakteristike trinaest izabranih magmatskih kompleksa Vardarske zone tercijarne starosti, i laboratorijski određena mineraloško-petrografska svojstva stena u njihovom sastavu i fizičko- mehanička svojstva kamena značajna za utvrđivanje mogućnosti njihove primene za dobijanje blokova arhitektonskog građevinskog kamena iz kojih se dobijaju ploče za oblaganje građevinskih objekata. Svi magmatski kompleksi se nalaze u Eksternoj vardarskoj podzoni. U grupu magmatskih kompleksa sa ocenom "velika perspektivnost" spadaju sledeći plutonski magmatski kompleksi: boranjski, bukuljski, kosmajski, kremićki i željinski. U prelaznu grupu između velike i srednje perspektivnosti spadaju plutoni Brajkovca i Drenja i subvulkanska masa Slavkovice. U grupu magmatskih kompleksa sa ocenom "srednja ili ograničena perspektivnost" spadaju vulkaniti Ravnog brda (Borač) i Gradske Gore (Rudnik). U prelaznu grupu između srednje i male perspektivnosti spada cerski pluton. U grupu magmatskih kompleksa sa ocenom "mala perspektivnost ili neperspektivna" spadaju vulkaniti Talambasa (Borač), Brvenika-Šumnika i Velike Bisine (Ibarski vulkaniti), Ćeramida (Rudnik) i Kamenice (Stolovi). Na osnovu svih prikazanih činjenica, može se doneti zaključak da plutonski magmatski kompleksi Vardarske zone imaju uglavnom veliku perspektivnost sa aspekta arhitektonskog građevinskog kamena, dok vulkanitski imaju vrlo malu ili nikakvu. Njihova svojstva koja su nepovoljna sa aspekta arhitektonskog građevinskog kamena čine ih idealnim za eksploataciju kao tehnički građevinski kamen. Ključne reči: Arhitektonski građevinski kamen, magmatske stene, Vardarska zona, Srbija. Pregled naučnih i stručnih rezultata u 2014. godini 85

M. Vasić

MODELOVANJE I OPTIMIZACIJA PROCESA SUŠENJA OPEKARSKIH PROIZVODA Univerzitet u Beogradu, Tehnološko - Metalurški fakultet, Beograd, 2014. Izučavanje procesa sušenja, zbog svoje kompleksnosti i danas privlači pažnju istraživača širom sveta. Objašnjenje procesa sušenja svodi se na: uspostavljanje niza teorijskih i empirijskih modela koji pokazuju slaganja, u većem ili manjem stepenu sa eksperimentalnim podacima. Složeni procesi istovremenog prenosa mase i energije, koji su često nestacionarnarnog karaktera, kao i različita priroda i osobine materijala (higroskopnost, kapilarnost, distribucija i veličina pora, pojava skupljanja uz mogućnost nastanaka prslina prilikom sušenja oblikovanih keramičkih materijala,..) još više komplikuju opisivanje procesa sušenja. Upravo to su razlozi zbog kojih jedinstveno teorijsko objašnjenje sušenja, koja bi univerzalno opisalo ovaj proces za različite tipove glinenih materijala još uvek nije razvijeno. Modelovanje procesa konvektivnog sušenja, sastoji se u rešavanju skupa parcijalnih diferencijalnih jednačina sastavljenih od jednačina kinetike procesa i jednačina bilansa mase i energije. S obzirom da se proces sušenja karakteriše nizom jednačina, koje izražavaju osnovne zakone fizike sušenja, a koje su izrazito ne linearne, uz napomenu da se vlažnost materijala menja na unapred nepoznat način (stohastički) i da ga karakteriše znatno vremensko kašnjenje, jasno se uočava da je izučavanje procesa sušenja, a pogotovu matematičko modelovanje kinetike sušenja, izuzetno složeno. Otuda postoji i potreba da se multidisciplinarnim pristupom i primenom savremenih postavki: fizike, hemije, nauke o materijalima, fenomena prenosa mase, teorije sušenja i računarskih tehnologija, prošire postojeća saznanja o procesu sušenja opekarskih proizvoda. Mehanizmi prenosa vlage za vreme sušenja u periodu konstantne, a naročito periodu opadajuće brzine sušenja, su vrlo kompleksni i do sada u literaturi nije postojalo opšte prihvaćeno objašnjenje koje bi moglo da identifikuje tačan prelaz i redosled delovanja svih potencijalno mogućih mehanizama sušenja. Predmet istraživanja ove doktorske disertacije usmeren je na definisanje sveobuhvatnog objašnjenja procesa prenosa vlage tokom izotermskog procesa sušenja, opekarskih proizvoda uz definisanje tačnog redosleda i rasporeda međusobne interakcije svih potencijalno mogućih mehanizama sušenja. U radu je pored literaturnog osvrta na savremna istraživanja procesa sušenja, dat i prikaz novorazvijenih načina modelovanja procesa sušenja i određivanja efektivnog koeficijenta difuzije. Ocena modela je izvršena na osnovu poređenja vrednosti promene sadržaja vlage u materijalu predviđene modelom i promena 86 Institut za ispitivanje materijala a. d. Beograd sadržaja vlage određenih eksperimentalnim putem ili preuzetih u izvornom obliku iz literature. Ostvaren doprinos ove doktorske teze, u definisanju sveobuhvatnijeg objašnjenja procesa prenosa vlage tokom izotermskog procesa sušenja, određivanju efektivnog koeficijenta difuzije, kao i modelovanju i optimizaciji procesa sušenja opekarskih proizvoda, se ogleda u definisanju i izradi:  tačnog redosleda i rasporeda uzajamnog delovanja svih potencijalno mogućih mehanizama sušenja.  matematičkih modela i softera za određivanje efektivnog koeficijenta difuzije.  predloga za: sprečavanje pojave nastanka pukotina prilikom sušenja, skraćenje vremena sušenja i optimizaciju istog.

Ključne reči: mehanizmi sušenja,evektivni koeficijent difuzije, opekarski proizvodi, sušenje, skupljanje.

Pregled naučnih i stručnih rezultata u 2014. godini 87

ORGANIZATION ORGANIZACIJA OF CONFERENCES STRUČNIH SKUPOVA 88 Institut za ispitivanje materijala a. d. Beograd

26. KONGRES I MEĐUNARODNI SIMPOZIJUM O ISTRAŽIVANJIMA I PRIMENI SAVREMENIH DOSTIGNUĆA U GRAĐEVINARSTVU U OBLASTI MATERIJALA I KONSTRUKCIJA Vrnjačka Banja, Hotel Solaris Resort, 29-31.10.2014.

Organizatori Institut za ispitivanje materijala Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije Udruženje savremene industrije glinenih proizvoda Srbije Inženjerska komora Srbije

Simpozijum DIMK Srbije je imao međunarodni karakter što je izuzetno važno za nauku na polju ispitivanja i istraživanja materijala i konstrukcija. Prisustvo učesnika na simpozijumu je bilo izuzetno zadovoljavajuće. Posebno je bilo značajno prisustvo učesnika istraživača i inženjera iz okruženja: Slovenije, Makedonije, Bosne i Hercegovine. Po prvi put se u odnosu na prethodni trogodišnji period uočava značajan napredak u praćenju svetske naučne literature iz odgovarajućih naučnih grana koja je pretočena u domaća eksperimentalna istraživanja. Zaključeno je da učešće na međunarodnim i nacionalnih projektima, ako i novi uslovi za izbore u viša zvanja na Univerzitetima u zemlji i okruženju daju značajan napredak u procesu istraživanja. Prisutan je veliki broj mladih istraživača – studenata doktorskih studija čiji su rezultati rada vidni na osnovu izloženih radova na skupu. Posebno važan zaključak koji se može izvesti je da Republika Srbija na polju naučnih oblasti koje su na ovom simpozijumu obrađene ne kasni sa naučnim dostignućima već ide u korak sa zeljama u svom okruženju što je i najveći značaj ovog Kongresa.

Pregled naučnih i stručnih rezultata u 2014. godini 89

VII KONGRES SAVREMENE INDUSTRIJE GLINENIH PROIZVODA SRBIJE SA MEĐUNARODNIM UČEŠĆEM

Vrnjačka Banja, Hotel Solaris Resort, 15-17.10.2014.

Organizatori Institut za ispitivanje materijala Udruženje savremene industrije glinenih proizvoda (SIGP), Beograd

Kongresom su obuhvaćene teme vezane za geološka istraživanja sirovinske baze, eksploataciju, preradu sirovine, tehnološke procese oblikovanja, sušenja i pečenja i automatizacija procesa. Posebna oblast kojoj je Kongres posvetio pažnju je primena građevinskom materijla na bazi gline. U okviru rada Kongresa reallizovano je i predstavljanje stranih i domaćih firmi – posebno proizvođača opreme za ciglarsku industriju kao i proizvođača grube i fine keramike.

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REŠENJE BRZE I EFIKASNE OBNOVE MOSTOVA I PUTEVA KOJI SU OŠTEĆENI POPLAVAMA I KLIZIŠTIMA

Institut IMS, Beograd, 10.7.2014.

Organizator Institut za ispitivanje materijala

U Institutu IMS je održan stručni skup, koji je okupio predstavnike Ministarstva građevinarstva, saobraćaja i infrastrukture, stručnjake Instituta IMS iz oblasti projektovanja, izgradnje, kontrole i sanacije infrastrukturnih objekata, kao i predstavnike lokalne samouprave, sa ciljem da se pomogne opštinama koje su pretrpele štetu na mostovima i lokalnoj putnoj mreži od poplava. Učesnici su se upoznali sa tehničkim mogućnostima Instituta IMS i partnerskih kompanija i predlogom modela saradnje sa ugroženim opštinama na otklanjanju posledica poplava. Kao društveno odgovorna organizacija, Institut IMS je predložio model saradnje, uzimajući u obzir finansijske teškoće nakon štete koja je pretrpljena.

Pregled naučnih i stručnih rezultata u 2014. godini 91

KORIŠĆENJE PEPELA IZ TERMOELEKTRANA NA UGALJ U GRAĐEVINSKE SVRHE

Institut IMS, Beograd, 21.8.2014.

Organizator ARCAN AG Zurich Institut za ispitivanje materijala Grahem d.o.o. Obrenovac

Institut za ispitivanje materijala je organizovao prezentaciju naprednih tehnologija švajcarske firme ARCAN AG. Šljaka iz ložišta i prašina nastala pri sagorevanju velikog obima u termoelektranama predstavlja opasan otpad kojizagađuje životnu sredinu, utiče na zdravlje ljudi i predstavlja problem za skladištenje. Stručnjaci iz ARCAN-a su predstavili inovativna rešenja i proizvode u vidu reaktivnih komponenti i vezivnih sredstava koja omogućavaju da mineralni otpad iz termoelektrana na ugalj transformišemo u visokokvalitetne građevinske proizvode sa izuzetnim osobinama.

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Pregled naučnih i stručnih rezultata u 2014. godini 93

RESEARCH PROJECTS NAUČNI PROJEKTI FINANCED BY THE FINANSIRANI OD STRANE MINISTRY OF EDUCATION, MINISTARSTVA SCIENCE AND PROSVETE, NAUKE TECHNOLOGICAL I TEHNOLOŠKOG DEVELOPMENT RAZVOJA 94 Institut za ispitivanje materijala a. d. Beograd

NAUČNI PROJEKTI FINANSIRANI OD STRANE MINISTARSTVA PROSVETE, NAUKE I TEHNOLOŠKOG RAZVOJA

TEHNOLOŠKI RAZVOJ

Ev. Naziv projekta broj

35002 Razvoj novih metodologija Dr Miodrag Arsić, revitalizacje turbinske i rukovodilac projekta hidromehaničke opreme Dr Vencislav Grabulov hidroelektrana u zavisnosti od uzroka degradacije materijala Dr Zoran Odanović Nebojša Milovanović

36014 Geotehnički aspekti istraživanja Dr Nenad Šušić, i razvoja savremenih tehnologija rukovodilac projekta građenja i sanacija deponija Mr Ksenija Đoković komunalnog otpada Dušan Berisavljević Jelena Ćirilović

36017 Istraživanje mogućnosti primene Dr Aleksandra Mitrović otpadnih i recikliranih materijala Dr Ksenija Janković u betonskim kompozitima, sa ocenom uticaja na životnu Mr Dragan Bojović sredinu, u cilju promocije Ljiljana Lončar održivog građevinarstva u Srbiji Marko Stojanović

35011 Integritet opreme pod pritiskom Mr Dejan Momčilović pri istovremenom delovanju Mr Vujadin Aleksić zamarajućeg opterećenja i temperature Pregled naučnih i stručnih rezultata u 2014. godini 95

35006 Održivost i unapređenje Dr Miodrag Arsić mašinskih sistema u energetici i

transportu primenom forenzičkog inženjerstva, eko i robust dizajna

35029 Razvoj metodologija za Mr Dejan Momčilović povećanje radne sposobnosti,

pouzdanosti i energetske efikasnosti mašinskih sistema u energetici

35040 Razvoj savremenih metoda Željko Flajs dijagnostike i ispitivanja

mašinskih struktura

INTEGRALNI PROJEKTI

Ev. Naziv projekta broj

45008 Razvoj i primena Dr Zagorka Radojević multifunkcionalnih materijala na Dr Anja Terzić bazi domaćih sirovina modernizacijom tradicionalnih Dr Milica Arsenović tehnologija Dr Miloš Vasić Ljiljana Miličić Ivana Delić

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OSNOVNA ISTRAŽIVANJA

Ev. Naziv projekta broj

186010 Minerali Srbije: sastav, struktura, Dr Snežana Dević geneza, primena i doprinos održanju životne sredine

172005 Uticaj nano i mikrostrukturnih Dr Zoran Odanović konstituenata na sintezu i karakteristike savremenih kompozitnih materijala sa metalnom osnovom

174004 Mikromehanički kriterijumi Dr Vencislav Grabulov oštećenja i loma

172057 Usmerena sinteza, struktura i Dr Anja Terzić svojstva multifunkcionalnih materijala

Pregled naučnih i stručnih rezultata u 2014. godini 97

SELECTED ODABRANE BUSINESS REFERENCES STRUČNE REFERENCE 98 Institut za ispitivanje materijala a. d. Beograd

U ovom odeljku dat je pregled ključnih usluga koje je Institut IMS izvršio u 2014. godini. U skladu sa multidisciplinarnom organizacijom Instituta, usluge obuhvataju izradu investiciono-tehničke dokumentacije, ispitivanja na terenu i u laboratorijama, stručni nadzor nad izvođenjem radova, studije, ekspertize i drugo u praktično svim oblastima građevinarstva i energetike. Pregled referenci dat je po organizacionim celinama.

Pregled naučnih i stručnih rezultata u 2014. godini 99

THE CENTRE CENTAR FOR MATERIALS ZA MATERIJALE 100 Institut za ispitivanje materijala a. d. Beograd

CENTAR ZA MATERIJALE

Laboratorija za kamen i agregat R.b. Referenca 1. Laboratorijska ispitivanja u cilju realizacije geoloških istraživanja ležišta . 2. Brojne analize kamena i kamenih agregata.

3. Ispitivanje maltera sa kulturno-istorijskih spomenika (malter sa Akvadukta u Skoplju, malter sa spomenika srpskom ratniku u Polumiru (Kraljevo), malter zidnih slika sa amfiteatra u Viminacijumu, malter sa Golubačke tvrđave) . 4. Ispitivanje kamena sa kulturno-istorijskih spomenika (kamen sa Akvadukta u Skoplju, kamen sa nadgrobnih spomenika u porti Petrove crkve kod Novog Pazara, kamen sa spomenika Jevrejima palim u Balkanskom i Prvom svetskom ratu 1912-1914, kamen sa Kamenog mosta u Ivanjici).

Pregled naučnih i stručnih rezultata u 2014. godini 101

102 Institut za ispitivanje materijala a. d. Beograd

Laboratorija za građevinsku keramiku R.b. Referenca 1. Elaborat o oceni kvaliteta opekarske sirovine sa ležišta Mala Grabovnica ciglane IGM Mladost, Leskovac. 2. Elaborat o oceni kvaliteta opekarske sirovine sa ležišta Batulovce ciglane IGM Mladost RAD, Vlasotince. 3. Elaborat o oceni kvaliteta opekarske sirovine sa ležišta Resinac, polje C ciglane IGM Mladost TMP, Mala Plana. 4. Elaborat o oceni kvaliteta opekarske sirovine sa ležišta Kaštavar ciglane IGM Mladost, Leskovac. 5. Studija o rezultatima dijagnosticiranja temperaturnog režima rada tunelske peći sa preporukama za optimizaciju procesa pečenja u pogonu 1 DILJ d.o.o, Vinkovci, Hrvatska. 6. Studija o rezultatima dijagnosticiranja temperaturnog režima rada tunelske peći sa preporukama za optimizaciju procesa pečenja u pogonu 2 DILJ d.o.o, Vinkovci, Hrvatska. 7. Studija o rezultatima dijagnosticiranja temperaturnog režima rada tunelske peći sa preporukama za optimizaciju procesa pečenja u pogonu Vojvoda Prijezda, Stalać. 8. Studija o utvrđivanju prirode i uzroka nehomogenosti površine crepa iz crepane IGM Mladost, Leskovac. 9. Elaborat o optimalnom formiranju deponije ciglane FIT FS, Bečej. 10. Optimizacija sirovinskih smeša i ocena mogućnosti proizvodnje fasadne opeke u ciglani IGM Mladost RAD, Vlasotince.

Pregled naučnih i stručnih rezultata u 2014. godini 103

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Laboratorija za beton R.b. Referenca 1. Kontrola kvaliteta betona na RTB Bor, za Energoprojekt- Visokogradnja, Bor. 2. Elaborat o eksperimantalnom utvrđivanju kvaliteta konstruktivnih elemenata za zgrade A i B Generalštaba VS u Beogradu. 3. Projekat betona za objekat: Centralno postrojenje za prečišćavanje otpadnih voda Vrbas i Kula, za Lad Group, Beograd. 4. Proizvodna sposobnost fabrike betona za Karin komerc MD, Novi Sad. 5. Proizvodna sposobnost fabrike betona za CD HIS, Niš. 6. Završne ocene kvaliteta betona za objekte izvedene u Srbiji za firmu Širbegović grupa – GMT Konstrukcije, Gračanica, BiH. 7. Kontrola kvaliteta betona na projektu: Most Zemun-Borča, za China Road and Bridge Corporation – Serbia. 8. Kontrola kvaliteta ugrađenih materijala tokom izvođenja radova na autoputu E-80, deonica Čiflik-Staničenje, za Construcciones Rubau – Ogranak Niš. 9. Pod-konsultant za nadzor građevinskih radova na autoputu E 75 (Grabovnica – Lovosoje), za Louis Berger. 10. Kontrola kvaliteta betona na gradilištu: Paralelni put Bela - Palanka Pirot, za Ferbild. 11. Tekuća kontrola kvaliteta betona na gradilištu: Autoput E-763, deo 3: Obrenovac-Ub, za China Shandong International Economic & Technical, Ogranak Beograd. 12. Kontrola kvaliteta materijala na građevinskom objektu: izgradnja autoputa E-75, deonica LOT 3-tunel Predejane i LOT 4-tunel Manajle za Euro Alliance Tunnels JSC- Ogranak Beograd. 13. Kontrola kvaliteta na deonica autoputa E-75 Grdelica –Caričina Dolina za firmu AZVI. Pregled naučnih i stručnih rezultata u 2014. godini 105

14. Kontrola kvaliteta na deonica autoputa E-75 Caričina Dolina-tunel Manajle za firmu Ogranak Prijedorputevi B Beograd.

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Laboratorija za akustiku i vibracije R.b. Referenca Investitor 1. Merenja nivoa komunalne buke na teritoriji Grad Beograd, grada Beograda na 35 definisanih mernih Gradska uprava, mesta u septembru i oktobru 2014. god. Sekretarijat za zaštitu Rezultati su pokazali da je dominantan izvor životne sredine buke u Beogradu saobraćaj. 2. Merenja nivoa komunalne buke na teritoriji Grad Beograd, grada Beograda na 15 ciljanih mernih mesta Gradska uprava, izabranih zbog učestalih pritužbu građana na Sekretarijat za zaštitu buku životne sredine Građani se najčešće žale na buku sistema za ventilaciju i klimatizaciju, na buku muzike iz ugostiteljskih objekata (restorana, kafića, klubova, splavova), ali i na buku od obavljanja delatnosti zanatskih pogona i drugih uslužnih delatnosti.

Pregled naučnih i stručnih rezultata u 2014. godini 107

THE CENTRE CENTAR FOR METALS ZA METALE AND ENERGETICS I ENERGETIKU 108 Institut za ispitivanje materijala a. d. Beograd

CENTAR ZA METALE I ENERGETIKU R.b. Referenca Investitor 1. Ispitivanje i ocena stanja turbinske i PD HE Đerdap d.o.o. hidromehaničke opreme agregata A5 HE Đerdap 1, IBR (VT, VTδ, MT, PT UT, RT, HT, Kladovo Replika) IR (mehaničko-tehnološke osobine, hemijski sastav, metalografija) Prijem opreme i kontrola tehničke dokumentacije hidroagregata i generatora u fabrikama u Srbiji i inostranstvu Izrada tehnologije zavarivanja, izbor elektrode i ispitivanje metala šava, ispitivanje za WPS procena preostalog veka konsalting usluge 2. Ispitivanje i ocena stanja turbinske i PD HE Đerdap d.o.o. hidromehaničke opreme agregata A1 i A2 HE Pirot, Pirot IBR (VT, VTδ, MT, PT UT, RT, HT, Replika), procena perostalog veka. Ispitivanje i ocena stanja dovodnog cevovoda

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3. Ispitivanje metala metodama sa i bez PD TE Nikola Tesla razaranja parovoda A1 – A6 d.o.o., Ispitivanje stanja turboagregata A2, A4, A5 i TE NT A, Obrenovac A6, kapitalni remont turboagregata A1 i A3 IBR (VT, VTδ, MT, PT, UT, RT, HT, Replika) IR (mehaničko tehnološke osobine, hemijski sastav, metalografija) Prijem opreme i kontrola tehničke dokumentacije 4. Ispitivanje metala metodama sa i bez PD TE Nikola Tesla razaranja opreme i parovoda d.o.o., IBR (VT, VTδ, MT, PT, UT, RT, HT, TE Kolubara A, Veliki Replika) Crljeni IR (mehaničko tehnološke osobine, hemijski sastav, metalografija) Prijem opreme i kontrola tehničke dokumentacije 5. Kontrolisanje i ispitivanje mašinske opreme PD TE KO Kostolac i radova na gradilištu u toku revitalizacije d.o.o., Bloka 1 i izgradnji postrojenja za TE Kostolac B, odsumporavanje dimnih gasova blokova 1 i Kopovi, Drmno 2 u TE Kostolac B 6. Ispitivanje metala bez razaranja na terenu i PD TE KO Kostolac ispitivanje metala sa razaranjem za potrebe d.o.o., TE Kostolac B TE Kostolac B, Parovodi B1 i B2 (RA, RB, RC), napojna Kopovi, Drmno voda (RL), međupovezni parovodi (MP1- MP2 i P2-P3) IBR (VT, VTδ, MT, PT, UT, RT, HT, Replika) IR (mehaničko tehnološke osobine, hemijski sastav, metalografija)

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7. Kontrolisanje metodama IBR PD HE Đerdap d.o.o., (VT,MT,PT,UT) i IR (mehaničko- HE Đerdap 1, Kladovo tehnološke osobine) pri izradi i sanaciji delova hidroagregata u fabrici LMZ, Silovie Mašini, Rusija 8. Utvrđivanje stanja račvi 6B i 7A trećeg EP CG, cevovoda na HE Perućica HE Perućica, IBR (VT, MT, PT, UT, RT), IR (mehaničko- Nikšić, Crna Gora tehnološke osobine) procena preostalog veka

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THE CENTRE CENTAR FOR ROADS ZA PUTEVE AND GEOTECHNICS I GEOTEHNIKU 114 Institut za ispitivanje materijala a. d. Beograd

CENTAR ZA PUTEVE I GEOTEHNIKU Laboratorija za geotehniku R.b. Referenca Ispitivanje šipova 1. Izveštaj o ispitivanju integriteta CFA šipova metodom SIT na lokaciji dr Oetker u Šimanovcima 2. Izveštaj o rezultatima ispitivanja nosivosti šipova na lokaciji dr Oetker u Šimanovcima 3. Izveštaj o ispitivanju nosivosti CFA šipova metodom dinamičkog probnog opterečenja (DLT) na lokaciji objekta dr Oetker u Šimanovcima 4. Izveštaj o ispitivanju integriteta šipova metodom SIT za objekat "Zaštita iskopa objekta 28A" na lokaciji kliničkog centra u Nišu 5. Izveštaj o ispitivanju kvaliteta izvedenih šipova metodom SIT za mostove Morava 1 I Morava 2 na autoputu E-75, deonica Vladičin han-Predejane (poddeonica Caričina dolina-tunel Manojle)-most Morava 2, stubno mesto S3L 6. Izveštaj o ispitivanju kvaliteta izvedenih šipova metodom SIT za mostove Morava 1 i Morava 2 na autoputu E-75, deonica Vladičin han-Predejane (poddeonica Caričina dolina-tunel Manojle), stubno mesto S6L,S2L,S9D,S3L,S5L,S9L,S6L i S3D 7. Izveštaj o ispitivanju kvaliteta izvedenih šipova metodom SIT za mostove Morava 1 i Morava 2 na autoputu E-75, deonica Vladičin han-Predejane (poddeonica Caričina dolina-tunel Manojle), stubno mesto S4L,S4D,S5D,S3D i S6D 8. Izveštaj o ispitivanju integriteta šipova metodom SIT za stubno mesto br.1 mosta na km:80+875, autoput E-80, deonica Čiflik-Pirot 9. Izveštaj o ispitivanju integriteta šipova metodom SIT za stubno mesto br.1 mosta na km:80+364, autoput E-80, deonica Čiflik-Pirot Pregled naučnih i stručnih rezultata u 2014. godini 115

10. Izveštaj o ispitivanju integriteta šipova metodom SIT za most, autoput E-80, deonica Čiflik-Pirot (istok) 11. Izveštaj o ispitivanju integriteta šipova SIT metodom (u svemu prema ASTM D5882) za objekat u bloku 41 na Novom Beogradu 12. Izveštaj o ispitivanju nosivosti šipova DLT metodom (u svemu prema ASTM D4945) za objekat u bloku 41 na Novom Beogradu 13. Izveštaj o ispitivanju integriteta šipova metodom SIT za objekat 290, u okviru postrijenja za prečišćavanje otpadnih voda u Šabcu 14. Izveštaj o ispitivanju integriteta šipova metodom SIT za ugostiteljski objekat TRICOLLORE, na katastarskoj parceli k.p. 16419, K.O. Zemun 15. Izveštaj o ispitivanju integriteta šipova metodom SIT za nadvožnjak Prnjavor (oznaka 0110) i nadvožnjak Mamutovac (oznaka 0180) na trasi autoputa Banja Luka-Doboj 16. Izveštaj o ispitivanju integriteta šipova metodom SIT za most Ukrina na trasi autoputa Banja Luka - Doboj (oznaka mosta 0220) 17. Sonic integrity testing of piles on the Banja Luka – Doboj highway for overpass Prnjavor (code0110) and Mamutovac (code 0180) 18. Sonic integrity testing of piles on the Banja Luka – Doboj highway for Ukrina bridge (bridge code 0180) 19. Izveštaj o ispitivanju kvaliteta izvedenih šipova metodom SIT na lokalitetu mosta 13 na km:1+843, autoputa E-763,Beograd-Južni jadran, deonica Ub-Lajkovac od km:40+645,28 do km:53+139,91 20. Izveštaj o ispitivanju nosivosti izvedenih šipova metodom dinamičkog ispitivanja DLT na lokalitetu mosta 13 na km:1+843, autoputa E- 763,Beograd-Južni jadran, deonica Ub-Lajkovac od km:40+645,28 do km:53+139,91 21. Izveštaj o ispitivanju kvaliteta izvedenih šipova metodom SIT (u svemu prema ASTM D5882) za fundiranje širokih kolona za postrojenje za preradu široke frakcije lakih ugljovodonika na putu Bački Gračac-Odžaci, Odžaci, temelj C21 i C31 116 Institut za ispitivanje materijala a. d. Beograd

Geotehnički elaborati 1. Izveštaj o debljinama humusa na lokaciji budućeg objekta dr Oetker u Šimanovcima 2. Geotechnical report for the bridge no.1 3. Geotechnical report for the bridge no.3 4. Geotechnical report for the bridge no.4 5. Geotechnical report for the bridge no.5 6. Geotechnical report for the bridge no.8 7. Elaborat o geotehničkim uslovima fundiranja rezervoarskog prostora 2x500m³ za biodizel na skladištu naftnih derivata u Nišu 8. Elaborat o geotehničkim uslovima fundiranja rezervoarskog prostora 2x500m³ za biodizel na skladištu naftnih derivata u Smederevu 9. Geotehnički elaborat za potrebe izgradnje objekta dnevnog/regalnog skladišta I interne saobraćajnice u skolpu rafinerije NIS a.d. Novi Sad 10. Izveštaj o izvedenim geotehničkim istraživanjima terena za potrebe izgrsdnje nove valjare u okviru kompleksa za proizvodnju pneumatika za motorna vozila u Pirotu 11. Geotehnički elaborat o rezultatima ispitivanja nosivosti montažnog platoa Polja D u Zeokama 12. Izveštaj o geotehničkim istražnim radovima za potrebe fundiranja radne skele na lokaciji budućeg mosta u Pirotu 13. Studija ocene stanja konstrukcije oštećene zgrade B Generalštaba VS u Beograd –sveska B3-Elaborat o geotehničkom ispitivanju tla, 14. Studija ocene stanja konstrukcije oštećene zgrade A Generalštaba VS u Beograd-sveska A3-Elaborat o geotehničkom ispitivanju tla, 15. Studija ocene stanja konstrukcije oštećene zgrade B Generalštaba VS u Beograd –sveska B2-Elaborat o grodetskom snimanju objekta,

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16. Geološko-geotehnička dokumentacija za potrebe izrade plana generalne regulacije za naseljeno mesto Lučani-osnovna dokumentacija 17. Projekat istraživanja za izradu geološko-geotehničke dokumentacije plana generalne regulacije za naseljeno mesto Lučani 18. Geološko-geotehnička dokumentacija za potrebe izrade plana generalne regulacije za naseljeno mesto Guča-separat 19. Geološko-geotehnička dokumentacija za potrebe izrade plana generalne regulacije za naseljeno mesto Guča-osnovna dokumentacija 20. Geološko-geotehnička dokumentacija za potrebe izrade plana generalne regulacije za naseljeno mesto Lučani-separat 21. Projekat istraživanja za izradu geološko-geotehničke dokumentacije plana generalne regulacije za naseljeno mesto Guča 22. Izveštaj o obilasku i pregledu terena i objekata na lokacijama masnih zajednica: Dljin, Guča, Viča, Kaona, Živica 23. Izveštaj o obilasku i pregledu klizišta na opštinskim putevima: OP 005 Rotajnik-Tijane, OP 004 Guča-Gornja Kravarica-Donja Kravarica, OP 001 Guča-Goračići-Guberevci i OP 006 Carevići-Rasovac-Ploče 24. Elaborat o geotehničkim uslovima sanacije klizišta Sarića Osoje u Nemanjinoj ulici-Užice 25. Izveštaj o merenju nivoa podzemne vode u pijezometrima na lokaciji Ušće šoping centar na Novom Beogradu 26. Izveštaj o izvođenju opita standardne penetracije za objekat Most preko reke Nišave, na km:54+453,391,stub S5L,šip br.17 27. Zapisnik o izvođenju opita standardne penetracije (SPT opit) u bazi šipa za most preko reke Stublenice i Jaruge na koridoru 11,deonica: Obrenovac-Ub,km:39+557.18, na osi S3,broj šipa S3-2 i S3-3 28. Elaborat o geotehničkim uslovima izgradnje platforme za avione,zgrade terminala,parking prostora I pristupne saobraćajnice u sklopu aerodroma Ponikve

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29. Elaborat o geotehničkim uslovima izgradnje stambenog naselja (tri objekta) spratnosti Pr+5 Krčagovo u Užicu 30. Elaborat o geotehničkim uslovima izgradnje crkve Krčagovo u Užicu 31. Elaborat o geotehničkim uslovima izgradnje crkve Međaj u Užicu Projekti sanacije klizišta 1. Separat projekta hitne sanacije klizišta-oštećenja trupa puta na državnom putu IB-30 (R-116), deonica: Ivanjica-Ušće, km:38+100 2. Projekat potporne konstrukcije na državnom putu IIA-152 (R-126), deonica: rudnik-Topola, mesto Rudnik na km:25+150 3. Glavni projekat sanacije klizišta na državnom putu IIa-137 (R-127) Krupanj-Mačkov kamen-Gračanica, na km: 6+900 4. Glavni projekat sanacije klizišta na državnom putu IIa-137 (R-127) Krupanj-Mačkov kamen-Gračanica, na km: 4+400 5. Glavni projekat sanacije klizišta na državnom putu IIa-137 (R-127) Krupanj-Mačkov kamen-Gračanica, na km: 2+600 6. Glavni projekat sanacije klizišta na državnom putu IIa-137 (R-127) Krupanj-Mačkov kamen-Gračanica, na km: 2+900 7. Glavni projekat sanacije klizišta na državnom putu IIa-137 (R-127) Krupanj-Mačkov kamen-Gračanica, na km: 3+600 8. Glavni projekat sanacije klizišta na državnom putu IIB-364 (R203), Brajkovac-Belanovica-Rudnik, deonica ID 0129,Varnice, km:50+700 9. Izmena-usaglašavanje postojećeg Glavnog projekta sanacije klizišta Vučje 1 na državnom putu IIB-436, Stojkovce-Vučje-Vladičin han, deonica Vučje-Vlajna, km:42+200-km:42+270, sa novonastalim stanjem na terenu posle elementarnih nepogoda 10. Projekat sanacije klizišta na državnom putu IB-27 (M-4) Slovac- Ćelije-Lazarevac-Aranđelovac-Kruševica-Đurđevo, deonica ID 0138,Kruševica, od km:667+350 do km:667+385 Pregled naučnih i stručnih rezultata u 2014. godini 121

11. Glavni projekat sanacije klizišta Pejičina krivina na deonici državnog puta IB-23 Požega-Čačak, deonica ID 0105 (Kratovska stena-skretanje za Markovicu), između čvornih tačaka 0168 i 0169, od km:595+500 do km:595+600 12. Glavni projekat sanacije klizišta na državnom putu IIB-364 (R-203) Brajkovac-Belanovica-Rudnik, deonica ID 0124, Varnice, km:45+600 13. Glavni projekat sanacije klizišta na državnom putu IIB-364 (R-203) Brajkovac-Belanovica-Rudnik, deonica ID 0123, Varnice, km:44+700 Tehničke kontrole 1. Izveštaj o tehničkoj kontroli tehničke dokumentacije Izvođačkog projekta izmene izvođenja useka na autoputu E-80, Niš (Prosek)- Dimitrovgrad (granica Bugarske), deonica 1 (Lot 1): Prosek- Bancarevo od km:18+125,17 do km:27+550, usek C4S-km: 23+950 do km: 24+575 2. Izveštaj o tehničkoj kontroli tehničke dokumentacije: Elaborat o geotehničkim istraživanjima terena za trafostanicu 380/220/110 kv Kraljevo 2 u Kraljevu Trafostanica 380/220/110 kv Kraljevo 2, seizmička mikroregionalizacija

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THE CENTRE FOR CENTAR ZA STRUCTURES KONSTRUKCIJE AND PRESTRESSING I PREDNAPREZANJE 124 Institut za ispitivanje materijala a. d. Beograd

CENTAR ZA KONSTRUKCIJE I PREDNAPREZANJE Odeljenje za prednaprezanje R.b. Referenca Investitor Primena sistema prednaprezanja SPB i SPB SUPER

1. Mostovi i nadvožnjaci na auto-putu Vektor Integra d.o.o. Banja Luka - Doboj Sarajevo Primena sistema prednaprezanja SPB i SPB SUPER i utezački radovi 2. Most preko potoka Lazanjac na autoputu E- GP Nikolić d.o.o. 763, Beograd – Požega, sektor II: Ljig – Kraljevo Požega, deonica 3: Takovo – Preljina. 3. Dva nadvožnjaka i most preko reke Temske Ferbild d.o.o. Beograd na autoputu E-80, deonica Čiflik – Staničenje. 4. Mostovi na autoputu E-75, deonica Caričina Ogranak Integral Dolina – Vladičin Han, lot 5. Inženjering Beograd d.o.o. Beograd 5. Most preko kanala Dunav – Tisa – Dunav sa West-Gradnja d.o.o. montažnim prilaznim konstrukcijama. Šabac 6, Krovna konstrukcija hale u Vranju - NOVEKO d.o.o. prednapregnuti dvopojasni nosači,. Vranje Stručni nadzor

2. Specijalistički stručni nadzor rada pogona za MARTINI GRADNJA adheziono prednaprezanje elemenata u d.o.o. Beograd. Inđiji. Pregled naučnih i stručnih rezultata u 2014. godini 125

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Odeljenje za sanacije, projektovanje i nadzor R.b. Referenca Investitor 1. Izrada studije ocene stanja konstrukcije Ministarstvo odbrane oštećene zgrade A i B GŠ VS u Beogradu 2. Glavni projekat rekonstrukcije objekata JP Čistoća i zelenilo centra za selekciju otpada u Subotici Subotica 3. Glavni projekat sanacije čeličnog mosta JP Direkcija za preko reke Ibar u Kraljevu na putu M-5 izgradnju grada Kraljeva

4. Glavni projekat konstrukcije objekata Gradnja, Osijek stambeno-poslovnog kompleksa u Osijeku

5. Glavni projekat za dve bitve za privez Luka Beograd pontona

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Laboratorija za ispitivanje konstrukcija R.b. Referenca Investitor 1. Ispitivanje konstrukcije mostova probnim JP Putevi Srbije opterećenjem na objektu : Stari most preko Dunava kod Beške, na državnom putu I - A reda br.1, deonica: Novi Sad – Beograd, LOT 5. 2. Ispitivanje oslonačkih reakcija na cevovodu JP Drinsko-Limske HE „Bistrica“. hidroelektrane 3. Ispitivanje probnim opterećenjem GP Nikolić konstrukcije mosta preko reke Ibar u i grad Kraljevo Kraljevu.

4. Ispitivanje stenskih ankera probnim Euro Alliance Tunnels opterećenjem – Koridor X, autoput E-75, JSC deonica : Niš – granica sa Republikom Makedonijom, Tuneli „Predejane“ i „Manajle“.

5. Ispitivanje krovnih nosača probnim YURA opterećenjem u proizvodnim objektima CORPORATION „YURA CORPORATION“.

6. Ispitivanje krovnih nosača probnim SHINWON opterećenjem u proizvodnim objektima „SHINWON“.

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CERTIFICATION BODY SERTIFIKACIONO TELO 130 Institut za ispitivanje materijala a. d. Beograd

SERTIFIKACIONO TELO Institut IMS ad je na osnovu Rešenja Ministarstva građevinarstva, saobraćaja i infrastrukture broj 35-00-00251/2013-04 od 28.05.2014. godine, imenovan kao telo za sprovođenje ocenjivanja usaglašenosti cementa opšte namene i cementa za specijalnu namenu u skladu sa zahtevima Pravilnika o kvalitetu cementa (Sl. glasnik RS, br. 34/13 i 44/14). Institut IMS ad je upisan u registar imenovanih tela za ocenjivanje usaglašenosti pod jedinstvenim registarskim brojem И 030. Institut IMS je krajem 2013. godine potpisao ugovor sa češkim institutom TZUS (www.tzus.cz) o saradnji i zajedničkom nastupu na tržištu RS, kojim se proizvođačima građevinskih proizvoda iz RS omogućava sertifikacija proizvoda u skladu sa važećom regulativom u EU (Uredbom (EU) br. 305/2011 Evropskog parlamenta i Saveta (CPR) i harmonizovanim tehničkim specifikacijama) i izvoz na tržište EU. U cilju pripreme osoblja Instituta IMS za sprovođenje sertifikacije proizvoda prema harmonizovanim evropskim standardima u toku 2013/2014. godine održane su sledeće obuke: Opšti zahtevi Uredbe (EU) br. 305/2011 Evropskog parlamenta i Saveta (CPR) koja propisuje harmonizovane uslove trgovine građevinskim proizvodima (Beograd, decembar 2013.); Postupak sprovođenja sertifikacije fabrike i fabričke kontrole proizvodnje betona u skladu sa standardom EN 206 (Beograd, jun 2014.); Postupak sprovođenja sertifikacije fabrike i fabričke kontrole proizvodnje dodataka betona u skladu sa standardom EN 934-1, EN 934-2, EN 934-6 (Beograd, jun 2014.); Postupak sprovođenja sertifikacije termoizolacionih materijala (Beograd, jun 2014.); Postupak sprovođenja sertifikacije eksternih termoizolacionih kompozitnih sistema (ETICS) (Beograd, jun 2014.). Nosilac obuke je češki institut TZUS, Prag.

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R.b. Referenca Investitor Sertifikacija proizvoda prema harmonizovanim evropskim standardima 1. ROCKWOOL ADRIATIC d.o.o., Potpićan, Hrvatska 2. URSA SLOVENIJA d.o.o., Novo Mesto, Slovenija 3. TRIMO INŽENJERING d.o.o., Beograd, Srbija 4. SIKA d.o.o., Beograd, Srbija

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CONTROL BODY KONTROLNO TELO 134 Institut za ispitivanje materijala a. d. Beograd

KONTROLNO TELO INSTITUTA IMS U okrobru 2014. godine je uspešno realizovano ocenjivanje Kontrolnog tela Instituta IMS od strane Akreditacionog tela Srbije. Kontrolno telo će dobiti sertifikat o akreditaciji za kontrolisanje: 1. Posuda pod pritiskom; Opreme pod pritiskom grejane plamenom ili na drugi način; Cevovoda; Sigurnosnih i pomoćnih uređaja, prema Pravilniku o tehničkim zahtevima za projektovanje, izradu i ocenjivanje usaglašenosti opreme pod pritiskom (Sl. glasnik RS br. 87/11). 2. Gvožđa i čelika (pljosnati proizvodi, limovi, trake, profili, cevi, šipke, žica, odlivci, otkovci, liveno gvožđe); 3. Metalnih konstrukcija (čeličnih i aluminijumskih); 4. Delova postrojenja i objekata (procesnih, hidroenergetskih, hidromašinske opreme, hidromehaničke opreme, termoenergetskih, turboenergetskih) pri izgradnji, rekonstrukciji, revitalizaciji i remontu). 5. Tehnologija zavarivanja metalnih materijala (elektrolučno zavarivanje, gasno zavarivanje, navarivanje). Institut IMS ima dugogodišnje iskustvo u oblastima kontrolisanja za koje se akreditovao i spreman je za realizaciju novih poslova iz navedenih oblasti.