DRY FIRE-RESISTANT CONSTRUCTION MIX Russian patent published in 2015 - IPC C04B28/14 

FIELD: chemistry.

SUBSTANCE: dry fire-resistant construction mix containing an expanded aggregate and surfactant additive and differing by the fact that the expanded aggregate is presented by expanded vermiculite of fraction not less than 1.25 mm and expanded perlite of fraction not less than 1.25; an active mineral additive is low-melting clay; a fibre filler is fibreglass max 5 mm long; a surfactant is Silipon 1880 air-entraining admixture; a set retarder is tartaric acid; an adhesion additive is Vinnapas 5010N redispersible powder; a viscosity enhancer is Amitrolit 8882; a water-retaining agent is Mecellose FMC 7150 cellulose ester in the following proportions, wt %: gypsum binder 68-73, expanded vermiculite 13-15, expanded perlite 4-6, fibreglass 1.5-2,5, low-melting (Cambrian) clay 6-8, air-entraining admixture 0.02-0.04, set retarder 0.05-0.1, redispersible powder 1.0-1.5, viscosity enhancer 0.1-0.2, cellulose ester 0.1-0.2.

EFFECT: increasing fire-resistant efficacy, crack strength, compression and bending strength, improving the rheological properties of the mix, extending the range of dry construction mixes with gypsum binder.

3 tbl