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ATLAS SAM 150
QUICK-SETTING, SELF-LEVELLING ROUGH FLOOR (from 15 mm) UNDER TERRACOTTA AND FLOOR COVERING, RECOMMENDED FOR FLOOR HEATING SYSTEMS
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USE
ATLAS SAM 150 is a self-levelling, quick-setting anhydrite jointless floor, suitable for machine making of rough floor inside buildings (in dry rooms), under terracotta and floor covering of different kind. It can be poured manually, but only on surfaces divided into technological fields, assuming a field's surface which can be poured within 30 minutes. It is suitable for all kinds of residential rooms and for public buildings. It is recommended that the thickness of one layer of the jointless floor should be from 1.5 to 6.0 cm. ATLAS SAM 150 can be applied as a connected jointless floor, jointless floor on a separation layer, floating jointless floor or in floor heating systems (due to its good heat conductivity and good insulation of heating pipes).
PROPERTIES
ATLAS SAM 150 is a ready-made, dry mixture consisting of mineral binders (anhydrite flour, a gypsum and Portland cement), fillers and modifying agents. It is non-flammable, very convenient and easy to use. It has self-levelling ability, can be easily and quickly poured on substrates with the help of machines equipped with worm pumps, which ensures efficient application and lower labour costs. After the completion of construction, ATLAS SAM 150 shows very good strength properties and after having set it is virtually a non-contracting material.
SUBSTRATE PREPARATION
ATLAS SAM 150 can be applied on any mature cement substrate and on any other mineral substrates, except for substrates with magnesia binder. The substrate should be structurally sound and of adequate load capacity. It should be free from dust, dirt, lime, oil, fat, wax, remains of paint etc. It can not be exposed to moisture. If necessary, the use of ATLAS UNI-GRUNT PRIMING EMULSION is recommended to reduce the substrate's absorptivity. The emulsion strengthens the substrate's surface, reduces absorption of water into the substrate and prevents the formation of air bubbles at its surface. All steel elements, which are in contact with the rough floor, should be protected against corrosion. During the process of the substrate preparation pay special attention to the following: the substrate should have tank-like appearance due to the risk of outflow of strongly penetrating mass; purity - contamination will float onto the surface; expansion joints are not necessary in case of pouring of a jointless floor over a surface smaller than 50 m2, where the diagonal is less than 10 m; however, separation of the jointless floor from the walls with the help of expansion joint tape or thin strips of foamed polystyrene is required.
MORTAR PREPARATION
A mixing-pumping unit, which enables continuous flow proportioning of water, should be used to prepare the mortar and pour it mechanically. The mortar becomes fit for use immediately after mixing and maintains its properties for about 30 minutes. To check the thickness of the mortar, pour out the mortar from a 1 l container onto even, non-absorptive substrate (for example - foil). The mortar should then form a "patch" about 45 cm in diameter.
CONNECTED JOINTLESS FLOOR
It is characterised by direct and whole-surface connection with the substrate, which should not be absorptive, therefore it is necessary to prime it earlier with ATLAS UNI-GRUNT. The minimum thickness of the subfloor is 15 mm. SAM 150, as a connected jointless floor, is not suitable for rooms affected by moisture.
JOINTLESS FLOOR ON A SEPARATION LAYER
On very weak, absorptive or oiled substrates SAM 150 should be placed on a separation layer (for example one made of 0.2 mm thick polyethylene foil). The insulation should be laid tightly without creases and folded onto the walls (onto the expansion joint strips), at least up to the rough floor's height. In case of substrates which are exposed to moisture, a vapour-resistant or anti-moisture insulation placed on the substrate may serve as the separation layer. The minimum thickness of the subfloor is 30 mm.
FLOATING JOINTLESS FLOOR
SAM 150 can be placed on thermal or sound insulation layers, for example made of foamed polystyrene of at least M-20 grade, made of hardened floor panels made of mineral wool or other materials fit for this purpose. The insulation should be placed tightly and horizontally on the substrate and the boards should be laid with offset edges. In order to level the substrate, substance such as dry sand may be used under the hard boards. The insulation must be always protected against contact with the rough floor being made, with the help of tight separation layer folded onto the walls (for example one layer of 0.1 mm thick polyethylene foil or plastic coated paper). The jointless floor can in no place have contact with the raw floor, walls or installations. The minimum thickness of the subfloor is 40 mm. If the compressibility of the insulation exceeds 5 mm or greater loads are anticipated, the thickness of the jointless floor should be increased correspondingly, or the jointless floor should be made as reinforced floor.
JOINTLESS FLOOR IN A FLOOR HEATING SYSTEM
The installation should be checked and fastened properly. In the case of water heating, the heating pipes should be filled with water before pouring SAM 150. The jointless floor should be made as two layers (in order to prevent floating of pipes); the first layer should be poured up to the upper edge of the heating pipes, and the height of the second layer should be at least 25 mm above the pipes. The second layer of the subfloor can be made after initial setting of the first layer, when it has become possible to walk over it (after at least 6 hours). If the installation has been made and fitted properly, it is allowed to make the jointless floor as a single layer. In order to vent the subfloor, it is recommended to use a brush with long, hard horsehair. In addition, respect the specifications of the technical project as well as recommendations provided by the heating installation's manufacturer. Progressive heating of the jointless floor (the temperature increasing by not more than 3°C in 24 hours) can begin no earlier than 7 days after having poured the subfloor, and full heating is allowed after 28 days.
APPLICATION
Before starting work it is necessary to set the planned thickness of the rough floor (on the walls and in the pour area) in the rooms. This can be done for example with the help of a level and portable ATLAS HEIGHT BENCH-MARKS. Pour the prepared mortar evenly and continuously up to the desired height. The assumed technological field should be completed in about 30 minutes. Just after having poured the mass in each field, de-aerate the material using, for example, an ATLAS ROLLER or a brush with long, hard horsehair, moving the brush in shaking manner along and across the poured surface. After having performed these operations self-levelling of the material occurs automatically. You should control the mortar's mixing degree and its thickness. During maturation of the jointless floor do not expose the floor to direct sunlight and draughts, and provide proper ventilation of the rooms. If white tarnish has appeared on the surface, remove it mechanically by grinding, and then vacuum the whole surface. The drying time of anhydrite jointless floor depends on the layer's thickness and also thermal conditions and humidity in a given room. Depending on the maturation conditions, humidity, kind of the floor covering and its permeability , the floor covering operations can start on average after 3 - 4 weeks. Before placing the floor covering it is recommended to dry the jointless floor's surface thoroughly, and prime it with ATLAS UNI-GRUNT.
COVERAGE
On average 20 kg of mortar will be used for 1 m2 for each 10 mm of the mortar layer.
TOOLS
Drill with mixer (manual pouring), mixing-pumping unit (mechanical pouring), brush with long, hard horsehair or ATLAS VENTING ROLLER, ATLAS HEIGHT BENCHMARKS. Wash the tools with clean water directly after use.
PACKAGING
35 kg paper bags
Pallet: 1050 kg as 35 kg bags
STORAGE AND TRANSPORT
The mortar should be kept and transported in tightly closed bags, in dry conditions. The mortar should be separated from wet substrate (preferably stored on pallets) The mortar is fit for use for 6 months.
CAUTION
The product reacts with water giving alkaline reaction, therefore it is necessary to protect skin and eyes. In case of the product's direct contact with eyes seek medical attention.
TECHNICAL DATA
Mixing proportions ....approx. 0.15 - 0.17 l of water for 1 kg of mortar
..............................approx. 5.25 - 5.95 l of water for 35 kg of mortar
Mortar's workability time.........approx. 30 minutes
Open time.........approx. 30 minutes
Mortar preparation temperature.....from +5°C to +25°C
Temperature of the substrate.......from +5°C to +25°C
Rough floor use after...........6 hours
Time of complete setting and drying......on average 7 days for each 1 cm of layer - at least 2 weeks
Floor covering........rough floor's humidity not greater than 0.5%
(PVC, terracotta, parquet)
Permeable floor covering........ rough floor's humidity not greater than 1%
(carpet and textile floor covering)
Dry mortar's specific gravity....................1.4 kg/dm3
Minimum thickness of mortar layer ..........15 mm
Maximum thickness of mortar layer.........60 mm
Crushing strength......not less than 20 MPa
Bending strength.......not less than 4.5 MPa
The product has been given Technical Approval no. AT-15-3552/99 by the Institute of Construction Technology and Hygiene Certificate no. B-2626/97 by the State Hygiene Institution.