ORGANOMINERAL MODIFIER FOR GYPSUM COMPOSITIONS AND RADIOPROTECTIVE ARTICLES BASED THEREON Russian patent published in 2019 - IPC C04B11/00 C04B28/14 C04B24/26 G21F1/04 C04B111/20 C04B111/27 C04B111/62 

FIELD: construction.

SUBSTANCE: invention relates to construction materials, specifically to additives used in making gypsum compositions and radioprotective articles based thereon. Disclosed is an organomineral modifier for gypsum compositions and radioprotective articles based thereon, which includes a hydraulic binder, an active mineral component, a plasticising additive and a setting time regulator, as an active mineral component, it contains metakaolin, as a plasticising additive - an aqueous solution of Glenium Ace 430 polycarboxylate ester, Best-SPl superplasticizer and further contains an aqueous emulsion of Octyltriethoxysilane Penta-818 and ground schungite with the following content of components, wt. %: hydraulic binder 35.81–55.79, metakaolin 7.16–11.16, aqueous solution of polycarboxylate ester "Glenium Ace 430" 2.69–4.18, super-plasticizer "Best-SPL" 0.45–0.7, water emulsion octyltriethoxysilane "Penta-818" 0.18–0.28, ground schungite 27.89–53.71, wherein the degree of shungite grinding is 200–300 m²/kg, metakaolin hydraulic activity is not less than 1200 mg/g.

EFFECT: technical result obtained by using the invention is to extend the setting time of the gypsum mixture, giving it self-sealing ability, increase the strength and water resistance of products based on gypsum binder while simplifying the technology of their production and giving them radioprotective properties.

1 cl, 1 dwg, 1 tbl