FIELD: building materials.
SUBSTANCE: invention relates to building mortar for sound-absorbing and refractory cover of internal walls, ceiling and similar surfaces in buildings. The finishing mortar for sound-absorbing and refractory cover for internal walls, ceiling and similar surfaces in buildings applying in concrete directly or on another load-carrying material, or another lower insulating material, such as mineral cotton, material comprising cellulose fibers and porous material comprises bentonite, ammonium polyphosphate and water glass additionally wherein the total content of porous material and cellulose fibers is 60-80% of the mortar but preferably about 67%, the content of ammonium polyphosphate is 10-15% but preferably 13%, the content of bentonite is 10-15% but preferably 13% also, and the content of water glass is 5-10% but preferably 7% of the mortar content. Cellulose fibers consist of mainly from cotton and porous material consists of perlite. The mortar shows gel-like tixothropic consistence. The invention provides improving sound-absorbing and refractory properties, possibility for applying the mortar on absorbing materials of low density, possibility the following treatment and repair without loss of sound-absorbing capacity.
EFFECT: improved and valuable technical properties of mortar.
3 cl, 2 ex
