’17 AGILIA™ SCREED A: EASTERN CANADA A PUMP-APPLIED CONTRACTORS FREE-FLOWING FLOOR SCREED LAFARGE RMX DEVELOPERS ARCHITECTS ENGINEERS ENGINEERS Technical Guide

INTRODUCTION

Introducing: Agilia™ Screed A

Lafarge is proud to introduce the innovative technology of Agilia™ Screed A, a pump- applied, free-flowing, self-consolidating synth- etic anhydrite screed.

This guide has been developed by Lafarge to provide both practical and technical knowledge on Agilia™ Screed A, including direction for the application of this easily placed floor topping, and insight to the unique characteristics of this newly developed concrete product.

The following material is compiled with the intention of acting as a resourceful tool when working with the product, Agilia™ Screed A, or simply just learning about it’s advantages in the world of ready mix concrete.

2 PAGE | LA FARGE CONCRETE LAFARGE GROUP

A company of more than 170 years of tradition and experience, Lafarge is the world’s leader in building materials, extracting resources from the heart of the earth and bringing them to life. Present in 78 countries, Lafarge responds to the world’s demands driven by the needs of the customer, the shareholder and the local communities.

At a global level, Lafarge is:

n° 1 in Cement, n° 2 in Aggregates, n° 3 in Concrete, n° 3 in Gypsum.

Lafarge is dedicated to developing advanced solutions for our customer’s challenges. On major leap in the ready mix concrete sector is the develop- ment of our innovative, value-added products.

Agilia, the self-consolidating concrete, Chronolia, a high-early strength concrete, Extensia, a low shrinkage concrete, Artevia architectural concrete collection, and Hydromedia, permeable concrete. These products work to revolutionize concrete construction by simplifying the work effort, improving placement methods, and providing durable, flex- ible materials.

Most recently introduced to the family of Agilia products, is Agilia Screed A. While Screed does share several characteristics of Agilia, such as the impressive leveling and self-consolidating cabilities, the main purpose of the Screed is as a floor topping. Similar to the other concrete products within the Lafarge portfolio, Agilia Screed A is designed to meet the sus- tainable building demand.

SUSTAINABLE DEVELOPMENT Lafarge has a strong commitment to sustainable construction, which is is understood as an endless company evolution.The Group has been working in partnership with the Wold Wildlife Fund for over 10 years and was ranked among the 100-best-performing multinationals in terms of sustainable development. Lafarge also works closely with the Canadian Green Building Council on localized solutions and the United Nations Environment Program to develop an international standard for sustain- able development

The Lafarge strategy also extends to providing a safe and healthy work- place. We are proud of the efforts of our employees, particularly in East- ern Canada Ready Mix, where we make reducing lost time incidents a priority every day.

TABLE OF CONTENTS

CHAPTER I Introduction 2

Lafarge Group 3 What is it? 5 10 Advantages 6

CHAPTER II

Applications and f loor systems of Agilia™ Screed A 8

Bonded 10 Unbonded/Floating 12 Insulation/Thermal 15 Radiant/Hydronic 18 Electrical 23 Special/Cavity 28

CHAPTER III

The production and quality control of Agilia™ Screed A 29

Advantages 29 Manufacturing/ Quality 30 Machinery/Accessories 31

CHAPTER IV

Machinery and accessories used in the application of Agilia™ Screed A 32 Workability 32 Mix Consistency/Test Method 33 Site Preparation 34 Installation Techniques 35 Construction Joints 36

Maintenance 37 Considerations/Precautions 38 Characteristics 39

Technical Datasheet 40

CONTACTS 41

4 P A G E | LAFARGE CONCRETE CH APTER I Agilia™ Screed A: What is it?

No project is complete without level or flat floors. Before the final layers of a floor can be installed, a smooth, surface must be present in order to accept floor finishes such as tiling, hardwood, lamin- ate, resin or carpet.

Lafarge offers the innovative flooring solution, Agilia™ Screed A, composed of a synthetic anhydrite binder used as a composite reactive filler in this pump-applied, free-flowing, self- consolidating floor screed. For this among many other advantages, Agilia™ Screed A has been developed as a ready mix product alternative to traditionally bagged floor toppings.

5 P A G E | LAFARGE CONCRETE CHAPTER I

10 Advantages of Agilia™ Screed A

PROPERTIES 1 The high flexibility of Agilia Screed A reduces the need for construction joints (up to 10,000 sq.ft without joints) and eliminates the need for reinforcement.

2 EASE OF PLACEMENT Typically a crew of 3 or 4 can pump up to 40,000 sq.ft per day.

3 FASTER FINISHING TIMES Agilia™ Screed A is ready within 24 hours and suitable for foot traffic usually within 24 to 48 hours. Partitions can be erected seven days after placing. Typical compressive strengths are 16, 20, 25, 30, 35 and 40 MPa.

SURFACE AESTHETICS 4 Agilia™ Screed A provides a smooth, flat surface for the application of most floor coverings with minimal or no crack- ing and no curling.

Application over 5 REDUCED THICKNESS radiant heating requires only There are significant material weight savings due to reduced 25 mm cover design thickness. Agilia Screed A is well-suited for radiant over the pipes. floor heating applications as it is typically applied and with only 25mm required above the pipes.

6 PAG E | LAFARGE CONCRETE 6 IMPROVED HEAT EFFICIENCY Reduced thickness enables the system to release the heat quicker and more efficiently. The full consolidation around the heating pipes is tight, due to the flowing nature of the screed which eliminates voids and air pockets. The thermal conduc- tivity of Agilia Screed A is up to 3 times more than that of cement-based screeds.

7 HEALTHIER MATERIALS This anhydrite binder is composed of 99% recycled materials which is protein free and will not harbour bacteria.

8 SAFER SITE CONDITIONS Agilia Screed A is exclusively installed by authorized contractors. The self-consolidating and fluid properties greatly reduces the labour required to place abd finish, and minimizes the number of crew required on site. The pumpability and fluid nature of the product also improves the physical erogonomics required to place and finish the product.

9 SUSTAINABLE DEVELOPMENT There are LEED® credits available when using Agilia Screed A under the Materials and Resources and the Indoor Environ- mental Quality sections of the Canadian Green Building Coun- cil (CaGBC) LEED Certification Guide.

10 QUALITY CONTROL The production and quality of Agilia Screed A are monitored regularly based on internal quality control which is in accor- dance with the requirements of the CSA A23.1-09 standard.

7 P A G E | LAFARGE CONCRETE CHAPTER II Applications and Floor Systems with Agilia™ Screed A

1. SCREED A PLACED ON BONDED FLOOR SYSTEMS

2. SCREED A PLACED ON UNBONDED/FLOATING FLOOR SYSTEMS

3. SCREED A PLACED ON INSULATION THERMAL SYSTEMS

4. SCREED A PLACED ON RADIANT/ HYDRONIC FLOOR

8 P A G E | LAFARGE CONCRETE CHAPTER II Applications and Floor Systems with Agilia™ Screed A

5. SCREED PLACED ON ELECTRICAL FLOOR SYSTEMS

6. SCREED FOR SPECIAL/CAVITY FLOOR SYSTEMS

7. AGILIA SCREED A FINA/ FEATHER-EDGED

9 P A G E | LAFARGE CONCRETE CHAPTER II BONDED FLOOR SYSTEMS

A layer of Agilia™ Screed A Polythene expansion foam

APPLICATION

Agilia Screed A is bonded directly to existing supporting concrete substrate. Screed can only be bonded to concrete. Consideration should be given to moisture transmission in slab-on-grade application

CONCRETE FLOOR PREPARATION

The surface area where screed is placed must be clean and dry, eliminating any contaminants that may be mixed in with the screed topping, altering the mix of damaging the quality of the surface finish. Mechanically preparing the concrete surface is recommended to increase the mechanical bond.

10 P A G E | LAFARGE CONCRETE CHAPTER II

The surface area where screed is to be placed and bonded to must be clear of dirt and any other contaminants to ensure there is no damage to the screed topping and screed surface. Large cracks or voids in the substrate should be filled to prevent large variances in the depth of the screed topping.

Perimeter expansion foam or plastic may be required around the perimeter of the pour area where protection to the existing wall is required. This will prevent water absorption from the screed into the wall which may affect the screed properties and cause damage to drywall or other absorbent wall finishes.

The concrete substrate must be primed with the appropriate bonding/primer. The manufacturers instruction for the application of the bonding/priming agent must be followed. The primer acts to seal the concrete surface against out-gassing and to minimize the water absorbed from the screed into the dry concrete slab.

SCREED THICKNESS The nominal thickness for screed placed bonded on a concrete slab should be:

• Agilia Screed A = 18mm – 60mm • Agilia Screed A FINA = 1mm – 20mm

11 P A G E | LAFARGE CONCRETE CHAPTER II UNBONDED/FLOATING FLOOR SYSTEMS

A layer of Agilia Screed A™ Polythene expansion foam Polythene 6 mil

APPLICATION Screed placed in an unbonded/ floating floor system is separated from the supporting substrate with a thin, damp-proof polythene sheet. The unbonded/ floating floor system prevents the screed from direct contact with the supporting ground. This system prevents the creation of stress between the screed and the substrate, and between the screed and the vertical building elements, such as walls or columns. The thickness of the polythene sheet should be min 6 mil.

SUPPORTING SUBSTRATE PREPARATION The surface where the screed is to be placed must be kept clean and dry, eliminating any im- purities that may get mixed in with the screed, altering the mix or damaging the quality of the surface finish.

12 P A G E | LAFARGE CONCRETE CHAPTER II

The surface where screed is to be placed on mustbe clean and free of dirt, lightweight part- icles and contaminants which may mix with the screed during placement to ensure there is no damage to the screed. Large cracks or voids in the floor must be filled prior to the installation of the 6 mil poly to prevent large variances in the depth of the screed topping.

Expansion foam must be restrained with sta- ples or tuck tape along the perimeter of the room and around pipes or columns protrud- ing vertically from the floor.

Tightly fit the perimeter expansion foam to the wall and corners to prevent unrestrained movement or creases.

Properly assembled expansion foam.

*Recommended perimeter expansion foam thickness: Thickness > 8 mm for spatial expansion; thickness > 16 mm for around columns, pipes, re-entry corners etc.

13 P A G E | LAFARGE CONCRETE CHAPTER II

The 6 mil poly is installed over or underneath the expansion foam, tightly fitted to the perimet- er of the room to prevent bending and creases in the poly. The poly joints should be overlap by 10mm and sealed with tuck tape. The 6 mil poly will also help reduce the transmission of moist- ure vapour from the substrate.

Poly must to be carefully fitted in the corners in line with the expansion foam.

Tightly fit the poly to the walls and corners against perimeter expansion foam. An alternative procedure is to install the poly before the perimeter foam, raising the poly up the wall tucked in behind the perimeter expansion foam.

SCREED THICKNESS The nominal thickness for screed placed in an unbonded system is between: • 25mm – 60mm.

14 P A G E | LAFARGE CONCRETE CHAPTER II SCREED PLACED ON INSULATION THERMAL SYSTEMS

A layer of Agilia Screed A™ Polythene 6 mil Insulation Board Polythene expansion foam

APPLICATION Screed placed in a thermal floor system is separated from the substrate with a layer of thermal and/or acoustic material. This composite screed system creates a floor with excellent thermal and acoustic properties. Perimeter expansion foam of 8 mm to 16 mm in thickness must be applied between the screed layer and any structural elements, such as walls or beams to elimi- nate significant stresses in the screed layer.

SUPPORTING SUBSTRATE PREPARATION The surface where the screed is to be placed must be kept clean and dry, eliminating any impurities that may get mixed in with the screed, altering the mix or damaging the quality of the surface finish.

15 P A G E | LAFARGE CONCRETE The surface where insulation is to be installed mustbe clear of impurities and objects that can lead to punctures, damages, and uneven panels.

Tighly fit the perimeter expansion foam to the wall and corners to prevent unrestrained move- ment or creases.

Perimeter expansion foam installation.

Recommended perimeter expansion foam thickness: Thickness > 8 mm for spatial expansion; Thickness > 16 mm for around columns, pipes, re-entry corners etc.

Lay the insulation panels in a way that will mini- mize gaps between adjacent panels and walls, and reduce movements.

16 P A G E | LAFARGE CONCRETE CHAPTER II

Install poly with the same procedure outlined for unbonded/floating floor systems.

Tightly fit the poly to the walls and corners against perimeter expansion foam. (An alter- native procedure is to install the poly before the perimeter foam, raising the poly on the wall tucked in behind the expansion foam).

SCREED THICKNESS The nominal thickness for screed placed on insulation is between 35mm - 50mm.

17 P A G E | LAFARGE CONCRETE CHAPTER II SCREED PLACED ON RADIANT / HYDRONIC FLOOR

A layer of Agilia™ Screed A Insulation Board Heating Tube Polythene (6 mil) Polythene

expansion foam

APPLICATION Agilia™Screed is poured directly over the radiant tubing and therefore, specific details must be considered in the design and installation phase; Such as the area size, heating zones, type of construction, and type of heating installation. The screed topping must be placed at the required depth of 25mm clear cover over the tubes to resist loads and to minimize the risk of cracking. Agilia™ Screed A has many advantages in radiant floor heating systems: • High thermal conductivity • The fluidity and self consolidating proper- ties of screed allows for tight encapsulation of the heating tubes. Therefore, resulting in rapid transfer of heat from the system to the surrounding environment. Joint spacing: • Radiant heated unbonded floors up to 3000 sq.ft. • Non-heated unbonded floors up to 10,000 sq.ft.

18 PAG E | LAFARGE CONCRET E CHAPTER II

The surface area where screed is placed must be clean, free of dirt, lightweight partic- les and contaminants which can mix with the screed during placement. Large cracks or voids in the floor must be filled to prevent large variances in the depth of the screed topping.

Tightly fit the perimeter expansion foam to the wall and corners to prevent unrestrained movement or creases.

Perimeter expansion foam installation.

*Recommended perimeter expansion foam thickness: Thickness > 8 mm for spatial expansion; Thickness > 16 mm for around columns, pipes, re-entry corners etc.

19 P A G E | LAFARGE CONCRETE CHAPTER II

Lay styrofoam as close to the wall as possible in an effort to reduce gaps, and reduce move- ment.

The poly should be placed without creasing or folding edges.

The poly should be tightly fitted in the corners with the application of the expansion foam.

20 PAG E | LAFARGE CONCRETE CHAPTER II

The floor heating tubes should be fastened to the supporting floor prior to pouring screed. Use clips or staples every 2-3 ft to prevent the tubesfrom floating to screed surface.

Following the tube/pipe installation, the floor heating system must be checked for working order before pouring screed. Begin by filling the pipes with water the pressure required by regulation standards and maintain this for 24 hrs. When the system is confirmed to be in working order without leaks, the pour can com- mence. When pouring, it is important to remain cautious of the system, ensuring that the team pouring the screed do not disrupt the place- ment of or damage the tubing in any way.

SCREED THICKNESS The minimum thickness for screed poured over the floor heating elements should be:

Cover over pipes = 25mm Total depth = 38mm - 44mm (depending on pipe diameter)

21 P A G E | LAFARGE CONCRETE CHAPTER II

FLOOR HEATING SYSTEM START-UP

1. The floor heating cycle can commence after 5 - 7 days

2. The initial temperature of the heating cycle should be 20°C

3. Increase the temperature by 5°C daily until the maximum temperature of 45°C is reached and maintain it for 3-5 days.

4. Decrease the temperature by 5°C daily until returning to a comfortable temperature of 18 - 20°C.

5. The maximum temperature of the heating pipes shall not exceed 50°C.

NOTE Following placement, su cient ventilation of the surrounding area is required to prop- erly cure the Screed.

22 P A G E | LAFARGE CONCRETE CHAPTER II SCREED PLACED ON ELECTRICAL FLOOR SYSTEMS

Polythene expansion foam A layer of Agilia Screed A™ Polythene 6 mil

Electrical Mat Insulation Board

APPLICATION Agilia™ Screed A is poured directly over the radiant heating wires and therefore, specific de- tails must be considered in the design and installation phase; Such as the area size, heating zones, type of construction, and type of heating installation. The screed topping must be plac- ed at the required depth of 25mm over the heating wires to resist loads and to minimize the risk of cracking.

Agilia™ Screed A has many advantages in radiant floor heating systems: • High thermal conductivity • The fluidity and self consolidating properties of screed allows for tight encapsulation of the heating wires. Therefore, resulting in rapid transfer of heat from the system to the surround- ing environment.

Joint spacing: • Radiant heated unbonded floors: up to 3000 sq.ft. • Non-heated unbonded floors: up to 10,000 sq.ft.

23 P A G E | LAFARGE CONCRETE CHAPTER II

The surface area where screed is placed must be clean, free of dirt, lightweight partic- les and contaminants which can mix with the screed during placement. Large cracks or voids in the floor must be filled to prevent large variances in the depth of the screed topping.

Tightly fit the perimeter expansion foam to the wall and corners to prevent unrestrained movement or creases.

Perimeter expansion foam installation.

*Recommended perimeter expansion foam thickness: Thickness > 8 mm for spatial expansion; Thickness > 16 mm for around columns, pipes, re-entry corners etc.

24 P A G E | LAFARGE CONCRETE CHAPTER II

Lay styrofoam as close to the wall as possible In an effort to reduce gaps, and reduce move- ment.

The poly should be placed without creasing or folding edges.

The poly should be tightly fitted in the corners with the application of the expansion foam.

25 PAG E | LAFARGE CONCRETE CHAPTER II

The floor heating wires should be tightly fast- ened to the supporting floor prior to pouring screed. Use glue or the appropriate fasteners every 2-3 ft to prevent the wires from floating

to screed surface.

Following the wire installation, the floor heating system must be checked for working order be- fore pouring screed. When the system is con- firmed to be in working order, the pour can commence. When pouring, it is important to re- main cautious of the system, ensuring that the team pouring the screed do not disrupt the placement of or damage the heating wires in any way.

SCREED THICKNESS The minimum thickness for screed poured over the floor heating elements should be:

Cover over pipes = 25mm Total depth = 25mm

26 P A G E | LAFARGE CONCRETE CHAPTER II

FLOOR HEATING START-UP

The floor heating cycle can commence after 5-7 days

The initial temperature of the heating cycle should be 20°C

Increase the temperature by 5°C daily until the maximum temperature of 45°C is reached and maintain it for 3-5 days.

Decrease the temperature by 5°C daily until returning to a comfortable temp- erature of 18-20°C.

The maximum temperature of the heating pipes shall not exceed 50°C.

The total time cycle required to run the heating pipes is between 18-24 days

NOTE Following placement, su cient ventilation of the surrounding area is required to prop- erly cure the Screed.

27 P A G E | LAFARGE CONCRETE CHAPTER II SCREED FOR SPECIAL/CAVITY FLOOR SYSTEMS

Polythene expansion foam A layer of Agilia Screed A™ Polythene 6 mil

Cavity Floor Structure

APPLICATION Installations and early loading of cavity oor system. Agilia™ Screed A characteristics include high ear- ly strength and exibility, allowing for easyconstant and centred loads - useful for storage or manufac- turing spaces require ventilation such as workshops or laboratories. This type of oor also withstands of application is often recommended for places such as oce buildings or open areas that elevated cavity also leaves space for ventilation, air conditioning or heating systems. This type the screed layer, it is possible to have additional installations or adjust existing systems. This such as electrical, wiring, piping, etc. Because there are revision aps already placed within ground and the anhydrite screed layer. The cavity is used to install all types of installations, The cavity oor system is a special structure which creates a space between the supporting.

Agilia™ Screed A characteristics include high early strength and exibility, allowing for easy installa- tions and early loading of cavity oor system.

28 P A G E | LAFARGE CONCRETE CHAPTER III The Advantages of Agilia™ Screed A:

No shrinkage or curling,

Level and flat floors, with no patching or grinding required,

No reinforcement required,

Jointless floors up to 10, 000 sq. ft. Radiant Floor applications up to 3000 sq. ft.,

Quick and easy placement – simply pump into place,

Improved acoustic properties and high performance systems to improve STS and IIC ratings,

High mechanical and fire resistance,

Improved heating efficiency in radiant floor heating systems, with superior thermal conductivity.

29 P A G E | LAFARGE CONCRETE CHAPTER III The Production and Quality Control of Agilia™ Screed A

MANUFACTURING AGILIA™ SCREED A

Agilia™ Screed A is manufactured at the concrete plant where the constituents, dosage and mixing is controlled by a computer system, ensuring a consistent and high quality product. The processes from mixing to pouring is subject to constant laboratory control which regulates the consistency of the product right to the construction site.

The ready anhydrite screed mix is delivered to the construction site is delivered in a ready mix truck and placed with a screed pumping system. Agilia ™ Screed A eliminates the challenges associated with storing materials onsite and the safety hazards associated in doing so.

QUALITY CONTROL Constituent mixing and dosage is a computer controlled process where all parameters of the production process are stored within a database. Laboratory and plant employees sample anhydrite screed batches, confirming the product meets all requirements and standards of CSA A23.1-09.

30 P A G E | LAFARGE CONCRETE CHAPTER IV The Machinery and Accessories used for Agilia™ Screed A

PUMP machine SLUMP boards

SCREED dubbing bar LEVELING with Laser or Tripod 0, 30 mm, 150, 220, 300 cm, 2 handles

SPONGE rubber balls FLEXIBLE rods, nom. diam. 50; 40 bar

31 PAG E | LAFARGE CONCRETE

CHAPTER V Workability of Agilia™ Screed A

TEMPERATURE REQUIREMENTS FOR AGILIA SCREED A Agilia™ Screed A must be placed in internal ambient temperatures above 5 degrees

APPLICATION AND CURING TIME FOR AGILIA SCREED A Agilia™ Screed A must be placed in internal ambient temperatures above 5 degrees

The open time for Agilia Screed A is 4hrs from time of batch in which the placing and finishing must be completed in.

The following processes should be followed within the specific open time: o Pumping and evenly spreading the screed on the floor surface, o Barring to finish the Screed, o Confirming level with a laser.

Table 1. The temperature shown below influences the processing time of Agilia Screed A:

erutarepmeT gnissecorP emit

C°02 - C°0 - C°02 5.4 sruoh

C°52 - C°02 - C°52 4 sruoh

C°82 - C°52 - C°82 .5.3 sruoh

Ideal temperature is between 23 +/- 3*C which allows for the proper curing and setting time. Lower or higher temperatures will result in a slower or faster curing rate. The pump lines should be kept out of direct sunlight, as the heat may affect the mixture consistency and slump when pumping.

32 P A G E | LAFARGE CONCRETE

CHAPTER V Mix Consistency and Test Method of

Agilia™ Screed A

Addition of water that exceeds the maximum specified limit of the slump flow can lead to segre- gation and uneven surfaces, as well as reduced mechanical properties. A slump flow below the lowest specified limit can lead to difficulty in placing and irregular, uneven surface finishes.

The slump cone is positioned on the slump board, filled to the top with screed, and then the cone is rapidly pulled up off the board allowing the Screed to spread. The flow is measured by taking the average of two perpendicular lengths of the spread.

Table 2. Recommended slump flow consistency for temperature and pipe length

Slump Flow Screed A Fina Air Temperature Pipeline Length

240 - 250 mm 320 - 360 mm Up to 25°C max 2 hoses

260 - 270 mm 340 - 370 mm 25 - 28°C max 2 hoses

250 - 260 mm 350 - 370 mm Up to 25°C 3-4 hoses

260 - 270 mm 360 - 380 mm 25 - 28°C 3-4 hoses

33 P A G E | LAFARGE CONCRETE CHAPTER V Site Preparation for Agilia™ Screed A

Preparation of the supporting floor for the installation of Agilia Screed A is one of the most im- portant steps to ensuring a successfully placed floor. The following conditions apply to every application of screed:

The surface must be clean and dry of any dampness or debris, especially Styrofoam or light weight pieces which are often left behind on job sites. These particles will mix in with the screed and float to the surface, resulting in surface defects.

The surface poly separating layer must also be cleared and dried to avoid mechanical de- fects.

The appropriate primer must be used in bonded applications.

Large cracks and voids on the supporting floor should be filled to avoid large variability in the screed topping thickness.

Recommended thickness for perimeter expansion foam: o Thickness along walls = 5 - 8mm along walls o Thickness around columns and re-entry points = 16 mm

Laying styrofoam should be installed in a manner that limits the openings between the ad- jacent boards and walls, limiting the movement of the boards.

Poly should be placed flat, avoiding any unnecessary folds and creases. All joints must be sealed with 10mm overlaps and tuck tape to prevent leaking.

The poly should be tightly fitted and to the walls and the perimeter foam in a manner that will prevent leaking or screed from flowing underneath the poly.

Other points to consider: o Lines and hoses should always be primed with the appropriate slurry prior to pumping screed. o Eliminate drafts in areas where screed is placed o Cover windows to prevent direct sunlight on the screed surface o Eliminate direct sources of heat: forced air, radiant, natural gas/propane heaters.

34 P A G E | LAFARGE CONCRETE

CHAPTER V Installation Techniques for Agilia™ Screed A

The shortest pouring point should be used to minimize the risk of bending or kinking the hose at any point.

Prior to pouring screed, the hoses should be primed with anhydrite, calcium carbonate slurry or other suitable methods. About 5 kilograms of primer should be used per single hose section. This proce- dure must be followed especially when the hose will be in a vertical position.

The hose elements must to be thoroughly washed out after each use.

Placement should be done by moving the pump line in a circular motion. The barring nishing pro- cess can begin after the screed has been placed to the required depth.

The rst pass with the bar is moved creating waves along the screed surface in one direction only. The second pass is completed in the perpendicular direction to the rst pass.

BAR TYPE FINISHING

35 P A G E | LAFARGE CONCRETE CHAPTER V Construction Joints

Types of joints:

Structural Joints Structural joints are installed within the load bearing structure elements. These joints must to be retained and mirrored within the screed layer in the exact location and identical in width.

Screed control joints within surface area surpassing 10, 000 sq. ft. They are installed in order to compensate for deformations caused by stress and temper- ature differences.

Screed control joints in radiant floor heating Installed in locations where different screed systems connect, heated and non-heated floors.

36 P A G E | LAFARGE CONCRETE

CHAPTER V Agilia™ Screed A Maintenance

The intended use of the product is for interior applications only, where there is no direct con- tact to water.

strong winds, wind direct sunlight gushes

cold flooding

Freshly laid screed should be protected against the following conditions for the first two days:

• Not meeting these requirements may result in early age cracking. • Accelerated drying and ventilating the areas where screed was placed can begin 72 hours from placement. • The radiant floor heating cycle can begin between 5-7 days from screed placement.

DRYING TIME

Table 3. Supporting ground moisture level for various surrounding temperature 16±2°C and air dampness condi- tions 65±5%

Layer thickness [cm] Average dampness [%] after the period of __ days

7 10 14 21 28 35

53 %3,3 %0,3 %5,1 %0,1 %5,0 %5,0

The presented results are based upon laboratory assumptions and may be applied to the approx. determination of construction site conditions therefore, a moisture test is recom- mended for accurate site or insitu moisture reading.

RECOMMENDATIONS FOR AGILIA SCREED A, FINISH FLOOR SUPPORTING LAYER Any loose laitance should be removed from the screed surface prior to applying tiles, wood floor or any other glue down floor finish. The laitance can be removed by sanding or grinding or stiff broom 4-8 days after placement. An appropriate priming/ bonding agent should be app- lied prior to installing glues and mortars as per manufacturers instructions.

37 P A G E | LAFARGE CONCRETE CHAPTER V

Considerations and Precautions

Surface laitance - The degree of laitance is increased when the surface is subjected to draughts. Rapid drying out of the surface can create a weak surface layer.

Plastic shrinkage cracking - Rapid drying of the surface increases the risk of plastic shrinkage cracking.

Variable surface finish - Wind tunnel syndrome will cause a variable surface finish in the screed due to different areas being subjected to different degrees of drying.

Remedial work - All of the problems listed above lead to remedial work having to be undertaken in order to remedy the defects.

Improper installation of expansion material results in the screed cracking. Expansion ma- terial should be instlled around the perimeter of the area to be poured with screed . It should also be placed around all columns and vertical extrusions within the floor area. It may be ne- cessary to place a double layer of the material around corners and re-entry points in order to resiste the increses strees in those areas. This is essential as the screed initially expands; if it cannot expand it will crack.

Holes in the polythene membrane allowing the ingress of water. This is predominantly a problem on the ground floors of buildings where the polythene membrane is actins as damp- proof or moisture suppression membrane and holes can lead to the ingress of water into the screed layer. This can result in aa increased vapour transmition for the ground through the floor and de-bonding of the finish floor surface from the screed.

Incorrect screed depth that lead to decreased strength. Setting the accurate level on site is critical in placing screed and the appropriate minimum depth. Not doing so may results in crack- ing. This is more likely to occur if the substrate is not of a uniform depth. Resistence to stresses and cracking decreases as the cross-sectional area of the screed is reduced.

Creases in the polythene membrane causing cracks. The poly should be laid flat with an overlap of 100mm (4”) between adjacent sheets, sealed with 50mm width tuck tape. Creases should be taped flat without creases.

38 P A G E | LAFARGE CONCRETE CHAPTER V Agilia Screed A Characteristics

Lafarge’s Screed A binder is used as a composite reactive ller in this pump-applied, free- owing, self-consolidating, self-leveling synthetic anhydrite oor screed.

Provides a smooth surface for the application of most oor coverings.

Provides a high-quality surface nish, with minimal to no cracking and no curling.

Reduced the need for construction joints.

No reinforcement required.

Ideal for use in radiant oor heating applications

Organic/protein free and will not harbour bacteria

SPECIFICATIONS

Flow range: Thickness: Drying time at 20 °C 60% RH: Agilia™ Screed A 240-270mm Agilia™ Screed A Up to 40 mm thickness 1 mm/day Agilia™ Screed A Fina 340-380mm Over 40 mm thickness 0.5 mm/day Bonded 20mm min. Maintenance of fluidity 4 hours Unbonded 25mm min. Over thermal Density: /sound insulation 35mm min. Agilia™ Screed A 2000 -2200 kg 3 /m Compressive strength: Over radiant pipes 44mm min. 3 Agilia™ Screed A 16-35 MPa Agilia™ Screed A Fina 1700-1900 kg /m Agilia™ Screed A Fina 25-40 MPa Agilia™ Screed A Fina Bonded 0-25mm. Flexural strength: 4 - 10 MPa

39 P A G E | LAFARGE CONCRETE CHAPTER V Technical Datasheet

1. Compressive strength 16 - 40 MPa

2. Flexural strength 4 - 10 MPa

3. The possibility for application of final flooring layer with the dampness at the level of (in accordance to the indication of hygrometer) - for floor finishing layers which do not allow for the passage 0.5% of water steam ex. wooden parquet 0.5% - for floor finishing layers which allow for the passage of 1.0% water steam ex. floor carpet 1.0%

tneiciffeoc refsnart taeH .4 taeH refsnart tneiciffeoc A - 0,2 ]Km/W[

ytilibammalF .5 ytilibammalF elbammalf-noN 1A

epocs Hp deercs teW .6 teW deercs Hp epocs ylthgilS enilakla

pocs Hp deercs yrD .7 yrD deercs Hp pocs e ylthgilS enilakla

ytisneD .8 ytisneD 0022 ± 001 m/gk 3

tneiciffeoc ytilibisnapxe taeH .9 taeH ytilibisnapxe tneiciffeoc 210.0 ]K-m/mm[

ssendrah ecafruS .01 ecafruS ssendrah BB/150/08 the result of 67,2 [N/mm2] has been obtained

11. ssertS dna gnillews Stress and swelling Swelling after 28 days of solidification 0,19 [mm/m] in accordance with IMMB research report no BB/150/08

13. The time for plasticity processing Max. 4,5 h, in accordance with the data from Table 1 (from the moment of loading in the concrete plant)

14. Foot Traffic After minimum 24-48 hours depending on the temperature and the level of surrounding dampness

15. The possibility for supporting ground weightening/load After minimum 5 days application (with conditions present on the construction site)

ytirutam reyal - ssenyrd lamrehT .61 lamrehT ssenyrd - reyal ytirutam retfA 3 skeew ni ecnadrocca htiw eht atad morf elbaT 3

17. Initiation of floor heating in case of the presence of the floor After min. 7 days heating system

40 P A G E | LAFARGE CONCRETE CONTACTS

TECHNICAL SALES SPECALIST

Luciana Gonsalves Innocon - Greater Toronto Area 50 Newkirk Road Richmond Hill, Ontario L4C 3G3 (416) 796 - 1112 [email protected]

Taras Saplywyj Lafarge - Hamilton Niagara Tri-Cities 525 Victoria Avenue North Hamilton, Ontario L8L 7V1 [email protected]

Darren Wright Lafarge - Northern Ontario 92 Industrial Court A Sault St. Marie, Ontario P6B 5W6 (705) 942 - 0627 [email protected]

Maranda Bennett Lafarge - Eastern Ontario 1651 Bearbrook Road Ottawa, Ontario K1G 3K2 (613) 408 - 2933 [email protected]

Manon Martineau Lafarge - Quebec 334 avenue Avro Pointe-Claire, Quebec H9R 5W5 (514) 434 - 1788 [email protected]

Adam Bender Lafarge - Southwest Ontario 1200 Trafalgar Street London, Ontario N5Z 1H5 (226) 378 - 6853 [email protected]

PRODUCT MANAGER

Adam Boddy Lafarge - Eastern Canada 6509 Airport Road Mississauga, Ontario L4V 1S7 (416) 986 - 5171 [email protected]

41 PAG E | LAFARGE CONCRETE

LAFARGE CANADA INC. Eastern Canada - Head Office 6509 Airport Road Mississauga, Ontario, L4V 1S7

1-800-LAFARGE www.buildingbettercities.ca