DESCRIPTION AND FIELDS OF APPLICATION
Acrylic latex for the preparation of self-levelling cement mortar in the shaving of concrete floors, new or existing, natural stone and in the creation of decorative troweled floors.
MAIN FEATURES
The mortars prepared with the latex are characterized by ease of spreading, high adhesive properties, resistance to abrasion, and general mechanical compression and flexural properties; to improve the characteristics use cement 42.5 N/mm2 in the mixtures. Self-levelling mortar skim coat can be left directly in place, or form the substrate for further finishing cycles. Used to finish, it is necessary to treat the mortar layer with an appropriate protective varnish to reduce dirt absorption and make the surfaces easily cleanable,
APPLICATION DATA
The substrates to be treated must be clean, free of substances that may hinder adhesion (waxes, oils, silicones), compact without detaching parts; the presence of slight moisture does not affect the use of the mixes, not suitable, however, for counterthrusting water.
Ceramic or mixed surfaces (concrete/ceramic, concrete/stone), must first be treated with DUALENE EPX FTR (solvent based), or DUALENE EPX FL (water based), primers (see data sheet), also used to attach a reinforcing mesh to the substrate. Glossy ceramic substrates should be matted before the primer is applied, with MONOPOL PL 06 (see technical data sheet). Always wait for the preparation products to dry before laying the mixes. Do not add water, but use only the binder to achieve the desired mix consistency. Do not use setting product, even with additional addition of latex.
Self-levelling mortar The thicknesses of mortar to be applied per single layer are 1-4 mm Mixing of the mortar components should be done mechanically, with a drill equipped with a special helical impeller or for large quantities in a concrete mixer. To obtain homogeneous mixtures free of lumps, mix for a few minutes with a reduced dose of binder and then adjust the fluidity of the mortar with additional quantity. Do not initially exceed the amount of latex as the final consistency is obtained after mixing. The rough composition of the mix to obtain a self-levelling mortar is as follows: cement kg 0.8 – quartz 01-03 kg 1.2 – latex DUALENE LIC SL kg 0.50-0.54 The decrease of binder directly affects the fluidity and self-levelling capacity.
The workability time varies depending on climatic conditions and the mass of product prepared; under normal conditions it is approx. 2 h. In case several layers of mortar are required, the minimum overlapping times depend on the thicknesses and climatic conditions, approximately wait 12-24 h.
It is very important to insulate the previous layer, with the binder diluted 1:1 in water, before laying the next layer; failure to insulate may result in the formation of air bubbles in the fresh mortar as a result of the absorption of the underlying thickness. 1
Decorative troweling To make decorative troweling mix the components as follows: white cement kg 0.33 – quartz kg 0.5 – latex DUALENE LIC SL kg 0.17 For coloring, water-based coloring pastes are used, to be added when mixing the coating components (the amount of paste depends on its concentration, with tinting pastes 5-8% by weight on mortar); the presence of cement results in some approximation in the final shade compared to other mass-colored systems. Use quartz 006-015 or 01-03 for more textural effects. Adjust the fluidity of the mix according to application needs by slight variations in the amount of latex
Apply at least 2 coats of mix, the second over the first dried coat; before spreading the next coat, the previous dry one must be isolated by application of a coat of latex diluted 1:1 with water, to limit absorption and facilitate the application of the new coat. For use on vertical walls, add 3-5% cellulose fibers (such as Arbocel) to the mortar, resulting in a thixotropic system. If the product tends to peel during application, moisten the surface with water spray and rework it.
The final dry layer is sanded (180-200 paper), until a smooth surface is obtained; for a sanding effect, pass the squeegee over it; if metallic, the surface shows dark streaks, use a plastic squeegee to reduce the effect; the intensity of the streaks can be reduced by further light sanding.
Remove all dusty residues before treating with protective paints or resins. Always provide protection with at least 2 coats of DUALENE AIC SW (see data sheet); in environments subject to prolonged contact with water, provide a third coat. The coating should be over-applied no earlier than 72 h and in any case only when completely dry throughout its thickness (consider at least 1 gg./mm thickness). Operate at temperatures between 10-30°C. Tools should be cleaned with water immediately after use.
YIELD
Yield varies depending on prepared mixes, roughness and substrate absorption. Self-levelling mortar At the given ratios, approx. 2 kg/m2/mm thickness is consumed, corresponding to 0.4 kg of binder (0.8 kg of cement and quartz). Spatulate For 2 layers approx. 1.6 kg/m2 is consumed, the amount of binder varies with the size of the filler used, indicatively it is approx. kg 0.3.
TECHNICAL DATA
Latex Bulk density .02 kg/L
Dry residue by weight 26%.
Min. storage temperature 5°C
Mortar (23°C, 50% RH, 28 days curing):
Density mass 2 kg/L
Flexural strength 9 N/mm2
Compressive strength 35 N/mm2
Abrasion resistance (ASTM D4060 – cs 22 – 0.5 kg) 200 rpm<0.6 g
