’17 Technical Guide AGILIA™ SCREED A: A PUMP-APPLIED FREE-FLOWING FLOOR SCREED LAFARGE RMX EASTERN CANADA ARCHITECTS ENGINEERS DEVELOPERS CONTRACTORS 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. 4 SURFACE AESTHETICS 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. HEALTHIER MATERIALS 7 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.