Basic MASSETTO

Basic MASSETTO è marcato CE come massetto cementizio A1fl-C25-F5 secondo la EN 13813.

The product can be used ready for use with the simple addition of potable water for each pack, in the quantity indicated in the table. The amount of water is decisive for the rapid drying of the screed: an excessive addition of water would delay it considerably. Basic MASSETTO has the workability of a traditional cement. It is important not to add water to the mortar that started to set, trying to re-use the mixture: it would lose all the chemical-physical properties. The mixing must be carried out with normal construction equipment (concrete mixer, planetary or auger mixer), transported with a pressure pump, applied and rubbed following the same methodologies as a normal cement screed. The surface of the screed can be leveled after 24 hours from laying with Betonfix RA. In case of anchored screeds, prime the surface with Kimicover FIX, laying the fresh screed on fresh. When making floating screeds, the surface to be treated must be clean and covered with a waterproof membrane (PVC, bituminous membrane) against any moisture rising from the substrate. In the perimeter of the rooms or in correspondence with internal elements such as pillars, place a soft separation element (cardboard, polyethylene, expanded polystyrene, etc.) with a thickness of 1 cm. The minimum thickness of the screed must be 4 cm: in localized reductions in thickness at the passages of piping or channels, the screed must be reinforced with a wire mesh. For floating screeds, the thickness can be reduced up to 3 cm, appropriately reinforcing the screed with wire mesh. Possible joints for working interruptions must be made leaving a sharp vertical cut and an electro-welded metallic reinforcement of union between the two castings, so as not to have unevenness. Provide expansion joints in the case of screeds that exceed 40 square meters or 8 meters in length. In the construction of screeds on radiant panel systems, the start of the thermal cycle begins after curing, at a supply temperature between 20 ° C and 25 ° C, which must be maintained for at least 3 days. The maximum design temperature must be set and maintained for at least other 4 days, in accordance with the indications provided by EN 1264-4.