PLASTER GYPSUM DRY CONSTRUCTION MIXTURE Russian patent published in 2018 - IPC C04B28/14 C04B18/14 C04B18/16 C04B111/20 C04B111/27 

FIELD: construction.

SUBSTANCE: invention relates to construction materials industry, namely to building materials based on gypsum binders, and can be used in the manufacture of building mixtures for plastering walls and ceilings inside buildings for various purposes, including rooms with high humidity (more than 60%). Plaster gypsum dry construction mixture, which includes as components gypsum, lime building aerated calcium quicklime, thickener - ether starch, retarder hardening - citric acid, contains as a filler a mixture of ground claydite dust and blast-furnace granular slags, as the water-retaining component - methylhydroxypropylcellulose "Mecellose® FMC 7150 "with the following component ratio, in mass%: gypsum building – 46.85-54.64, building lime - 3-5, expanded clay dust, ground to a specific surface of at least 300 m²/ kg is 10-20, granulated blast furnace slag, ground to a specific surface of at least 500 m²/ kg is 20-40, methylhydroxypropylcellulose "Mecellose® FMC 7150 "- 0.1-0.3, citric acid – 0.039-0.041, starch ether - 0.011-0.02.

EFFECT: technical result is an increase in compressive and bending strength, adhesion strength to the substrate, water resistance of plaster dry mortar mixes, as well as a reduction in the cost of material due to waste production.

1 cl, 2 tbl