FOR SCREEDS AND SUBFLOORS

FOR INTERNAL AND EXTERNAL USE

USE

ATLAS CEMENT FLOOR MORTAR is a dry cement-based compound designed for making cement subfloors and rough floors according traditional methods. It is applied for subfloor or rough floor making in the following arrangements: connected with existing substrate (minimum bed thickness - 20 mm), on the separating layer (minimum bed thickness - 35 mm), floating (minimum bed thickness - 40 mm) or in floor heating systems (minimum bed thickness over heating elements – 25 mm). ATLAS CEMENT FLOOR can be used for repair and modernisation work as well as for new projects. It is suitable for indoor and outdoor use. Use in reduced temperatures So-called antifreeze agents that enable work in reduced temperatures i.e. below +5°C can be added to the mortar. The new temperature range of mortar utilisation, method of preparation (in particular adjustment of the amount of added water), principles of conducted work and setting conditions have to be assumed in accordance with instructions of additives’ manufacturer. The amount of antifreeze agent added depends on the cement content in the mortar – the ratio of cement to fillers in ATLAS CEMENT FLOOR is 1:3. Note: Mortar manufacturer is not responsible for effects and quality of applied antifreeze additives.

PROPERTIES

ATLAS CEMENT FLOOR is a mixture of cements, mineral fillers and modifying agents characterised by improved technical parameters (as compared with typical cement mortars). It is characterised good adhesion, high plasticity and increased bending strength, making it a general-purpose product. Easy mass preparation and its operating parameters (excellent fluidity and self-levelling ability) make it convenient to use. Optimum selection of the setting time (up to ca. 3 hours) and quick increase of strength parameters make the subfloor usable in a shorter period of time and ensure preparation of other work ATLAS CEMENT FLOOR MORTAR is frost- and water-resistant.

SUBSTRATE PREPARATION

The method of preparation depends on the arrangement in which ATLAS CEMENT FLOOR is to be used. In any case, the substrate should be stable and structurally sound. If rough floor or subfloor is to be connected with substrate, the substrate should be free from anything that may impede adhesion, in particular dust, dirt, lime, oil, fat, wax, bitumen, paint, etc. Mechanically remove loose elements and parts of substrate of poor strength. If necessary, use one or two layers of ATLAS UNI-GRUNT PLUS priming emulsion to reduce substrate’s excessive absorptivity. Apply the second layer of the emulsion crosswise towards the first one, after ok. 2 hours. Do not leave pools! Start application of the mortar after the emulsion dries, at earliest after 6 hours of emulsion application. In case of subfloor or rough floor on the separation layer or in the so-called floating arrangement, pay special attention to accurate and even distribution of all thermal or sound insulation layers on the surface. Walls and other elements within the range of conducted work e.g. pillars should be separated (using expansion joints) from the subfloor using e.g. ATLAS EXPANSION TAPE or thin foamed polystyrene boards.

PRODUCT PREPARATION

Prepare the mix by pouring dry compound into a container with suitable amount of water (in the ratio of 2.4÷4.5 l of water for 30 kg of container) and mix until homogenous. It is best to mix it mechanically, using a drill with a mixer, flow mixer or in a concrete mixer. The compound is ready to use right after mixing. It maintains its properties for 1 hour. Adjust the ratio of added water experimentally, following the desired consistency of the mortar, type of substrate and weather. Inappropriate amount of water for mass preparation results in deterioration of strength parameters of the rough floor or subfloor.

APPLICATION

Conduct all work in accordance with floor work technology. To obtain even rough floor or subfloor surface, use wooden or metal screeds. Place screeds in such a way so that the bed thickness corresponds to the assumed size and that it is no less than the minimum value assumed for a given construction arrangement (connected with the substrate, on the separation layer, floating). In order to thicken the compound and obtain homogenous floor, lath vibrating or beating down by float is applied. Rake up the excess mix, making zigzag moves. After about 3 hours float the floor and smooth it with a float. Prepare expansion joints in accordance with pouring technology of cement floors and rough floors. Protect the poured mix from drying too quickly, direct sunlight, low air humidity and draughts. To ensure convenient setting conditions, as needed, sprinkle the fresh surface with water or cover it with foil. Reduce heating of the room. The drying time of the underlayment depends on the bed thickness and also ambient thermal conditions and humidity. It is possible to begin underlayment use after about 24 hours, whereas any load can be placed on it after ca. 14 days. The moment of work commencement depends on the type of anticipated tiles and work should start when rough floor parameters stabilise (after 3÷4 weeks), and in case of PVC or wood flooring – after complete drying. The information comprises basic instructions of product application and does not relieve users of responsibility for work in accordance with good construction practice and OHS regulations.

CONSUMPTION

On average, ca. 20 kg of the mortar is used for 1 m2 for each 10 mm of the layer.

TOOLS

Laths and floats made of wood or metal. Wash the tools with clean water directly after use. Clean the remainder of the set mortar that is difficult to remove with ATLAS SZOP.

PACKAGING

Paper bags: 30 kg Pallet: 1080 kg in 30 kg bags

STORAGE & TRANSPORT

Store and transport in tightly closed bags, in dry conditions (pallets are particularly recommended). Keep dry. Shelf life in conditions complying with the requirements is 12 months from the date on the packaging.

CAUTION

Irritant. Protect skin, eyes and respiratory tract. Keep out of the reach of children. Do not inhale dust. In case of contact with eyes, immediately rinse with plenty of water and seek medical attention. In case of ingestion, immediately seek medical attention and show the packaging or label.

TECHNICAL DATA

Mixing proportions: ca. 0.08÷0.15 l of water for 1 kg of mortar ca. 2.40÷4.50 l of water for 30 kg of mortar Pot life - ca. 1 hour Temperature: mortar preparation temperature – from +5°C to +25°C Substrate and ambient temperature during work – from +5°C to +25°C Resistance to temperature during work from -20°C to +60°C aggregate diameter – 3.0 mm Underlayment use – after ca. 24 hours. Min. thickness - 20 mm (depending on the system in which the screed is used) Content of soluble chromium (VI) in ready-to-use mix - ≤0.0002% PN-EN-13813:2003 CT-C30-F5-AR0.5 Reaction to fire - A1fl class Corrosive substance release - CT Water permeability – NPD Water vapour permeability – NPD Compressive strength C30 (≥ 30 N/mm2) Flexural strength – F5 (≥ 5 N/mm2) Abrasion resistance AR0.5 Acoustic insulation - NPD Sound absorbance NPD Thermal resistance - NPD Chemical resistance - NPD

CERTIFICATES

The product conforms with PN-EN-13813:2003 CT-C30-F5-AR0.5 and has been given Technical Approval AT-15-6972/2006 by the Building Research Institute and Hygiene Certificate no. B-2628/97 by the National Institute of Hygiene.