Experimental Investigation on Solid Concrete Blocks with Partial Replacement of Coarse

JOURNAL OF INFORMATION, KNOWLEDGE AND RESEARCH IN CIVIL ENGINEERING EXPERIMENTAL INVESTIGATION ON SOLID CONCRETE BLOCKS WITH PARTIAL REPLACEMENT OF COARSE AGGREGATE WITH CINDER 1DR. P.S. RAGHUPRASAD, 2R. SATISH, 3D.B. NIRMALA, 4DR. A.V. PRADEEP KUMAR 1 Lecturer, Dept. of Construction Technology and Management, Sri Jayachamarajendra College of Engineering, Mysore-570 006. 2 Asst. Professor, Dept. of Civil Engineering, Sri Jayachamarajendra College of Engineering, Mysore-570 006. 3 Lecturer, Dept. of Construction Technology and Management, Sri Jayachamarajendra College of Engineering, Mysore-570 006. 4 Professor and Head, J.N.N. College of Engineering, Shimoga-572 204. [email protected]

ABSTRACT: With the advent of Industrial Revolution and mass construction in various parts of the world, the pollution levels and the scarcity of materials have reached the peak. It is high time now to construct economically yet meeting the desired strengths and results. The coarse aggregates in the conventional solid concrete blocks were replaced partially with Cinder (12mm) and tested for compressive strength at the age of 3days, 7days and 21days. From the results of the investigation, it can be concluded that solid concrete block with 15% replacement of coarse aggregate by cinder records more strength than the conventional one.

Key words: Solid Concrete Block, Cinder, Compressive Strength, Water absorption.

1. INTRODUCTION: sustainable solution to make the alternative The construction industry has been materials available to solve the housing one of the topmost sectors growing day by problem. day with time. The building materials are Some of the materials are procured in immense quantities and the manufactured by using various industrial older buildings are being demolished to waste materials such as fly ash as the raw ground zero. The demand for building material for their production. Besides materials has been continuously rising being eco-friendly, they impart higher with the increasing need for housing both strength and durability for the structure. in rural and urban areas. Commercial exploitation of traditional building 2. EXPERIMENTAL PROGRAM: materials by various industries has Cement, Quarry dust (as fine aggravated the situation. It has, therefore, aggregate), coarse aggregate (12mm size), become necessary to think over this Cinder (12mm size for partial replacement problem seriously and to provide some

ISSN: 0975 – 6744| NOV 09 TO OCT 10 | Volume 1, Issue 1 Page 11 JOURNAL OF INFORMATION, KNOWLEDGE AND RESEARCH IN CIVIL ENGINEERING for coarse aggregate) were used in the present investigation. Table 2.2 Results of tests on Aggregate

Quarry Coarse Property 2.1 Tests on Cement: 43 Grade OPC Dust aggregate Specific cement was used throughout the 2.53 2.61 gravity investigation. The various physical Fineness 2.79 6.78 properties of cement were determined in modulus accordance with BIS specification and the results are listed in Table 2.1. 2.3 Tests on Cinder: The 12mm and down size coarse aggregate were partially Table 2.1: Results of tests on Cement replaced by Cinder pieces. The Cinders Tests Results procured, initially being 40-60mm size i. Normal 27% were suitably crushed manually to 12mm Consistency IS: 269-1958 and down using conventional hammer. ii. Initial setting 89 minutes time test The 12mm and down cinder pieces iii. Final setting 210 minutes were used as a partial replacement of time test 285 m²/kg 12mm and down Jelly. The blocks were iv. Fineness test IS: 269-1976 cast with 10%, 15% and 20% replacement v. Specific gravity 2.90 of 12mm and down Jelly with 12mm and test IS: 269-1976 3 days: 27 MPa; down Cinder. The specific gravity of vi. Compressive 7 days: 36.5 MPa; cinder was found to be 1.97. strength test 28 days: 49.65 MPa; Cinders are light weight aggregates which when used as an aggregate in 2.2 Tests on aggregate: Quarry dust concrete substantially decreases the overall procured were made to pass through weight of concrete. Cinders also possess a 2.3mm IS Sieve and the retained quarry very harsh or rough texture and hence dust on the 1.16mm IS Sieve were (fully) binds extremely well with cementitious used as fine aggregate and the coarse materials producing a stronger mix. aggregate of 12mm and down size were used throughout the investigation. The 3. TESTS ON CONVENTIONAL specific gravity and fineness modulus were SOLID CONCRETE BLOCK AND determined in accordance with BIS SOLID CONCRETE BLOCK WITH specification and the results are presented PARTIAL REPLACEMENT OF in Table 2.2.

ISSN: 0975 – 6744| NOV 09 TO OCT 10 | Volume 1, Issue 1 Page 12 JOURNAL OF INFORMATION, KNOWLEDGE AND RESEARCH IN CIVIL ENGINEERING COARSE AGGREGATE WITH replacement of coarse aggregate with CINDER: cinder with 10%, 15% and 20% 3.1 Details of specimen: The specimens respectively. Compressive strength and were designated as 0C, 10C, 15C and 20C water absorption rate were determined and for conventional solid concrete block and the results are tabulated in Table 3.1 & solid concrete block with partial 3.2..

Table 3.1: Results of Compressive Strength

Type of 0C 10C 15C 20C Specimen

Age, Days 3 7 28 3 7 28 3 7 28 3 7 28

Compressive Strength, 2.10 2.64 4.17 3.29 5.00 5.54 3.48 5.14 5.90 2.94 4.14 4.92 MPa

Table 3.2: Results of Water Absorption average compressive strengths of Test 3.48MPa, 5.14MPa and 5.90MPa against Dry Wet 2.10MPa, 2.64Mpa and 4.17MPa Type of Absorption, weigh weigh Specimen % observed for conventional solid concrete t (kgs) t (kgs) block at 3, 7 and 28 days respectively and this increase in strength is about 39.66%, 0C 15.3 16.7 9.15 48.64% and 29.32%. From the above, it is evident that the solid concrete blocks with 15C 14.9 16.6 11.40 incorporation of cinders as partial replacement by 15% has higher 4. RESULTS AND DISCUSSION: compressive strength and hence it can be The results of compressive strength used as partial replacement for coarse presented in Table 3.1 and variations with aggregate. Further the results of water age are shown in Fig. 1. From the results it absorption test has been presented in Table has been observed that the solid concrete 3.2. From the results it has been observed blocks with incorporation of cinders as that the absorption rate for solid concrete partial replacement by 15% recorded an blocks with incorporation of cinders as

ISSN: 0975 – 6744| NOV 09 TO OCT 10 | Volume 1, Issue 1 Page 13 JOURNAL OF INFORMATION, KNOWLEDGE AND RESEARCH IN CIVIL ENGINEERING partial replacement by 15% is slightly that replacement for coarse aggregates making is about 2.25% more than that observed for the block lighter, stronger, economical or conventional solid concrete block. cost effective and also ensuring the safe However the variation in absorption rate is disposal of waste products thereby very marginal. maintaining the ecological balances, limiting usage of valuable natural resources without compromising with the performance characteristics, strength and CONCLUSIONS: durability. From the above studies it is observed that that the solid concrete blocks with REFERENCES: incorporation of cinders as partial M. S. Shetty, (2005), “Concrete replacement by 15% recorded higher Technology Theory and Practice” compressive strength than that observed S. Chand & Company Ltd for conventional solid concrete block. Publications. Hence it can be concluded that cinder, S. C. Rangwala, (23rd Edition, 2005), being a waste product can be utilized “Building Construction”, Charolae effectively and efficiently in the casting of Publishing house. solid concrete blocks as a partial www.google.com

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