GYPSUM-CEMENT-POZZOLANIC COMPOSITION Russian patent published in 2019 - IPC C04B11/30 C04B28/14 C04B18/04 C04B111/20 

FIELD: construction.

SUBSTANCE: invention relates to construction materials. Gypsum-cement-pozzolanic composition contains calcined gypsum, Portland cement, metakaolin, modifying additive Melment F15G, fractionated rubber crumbs in amount of 5 % of fraction from 5 to 2.5 mm, 30 % of fractions from 2.5 to 1.25, from 1.25 to 0.63, from 0.63 to 0.315 mm and 5 % of fraction from 0.315 to 0.16 mm and water in following ratio of components, wt%: calcined gypsum 35.5–64.4, Portland cement 4.2–10.6, metakaolin 0.4–1.3, said additive 0.6–0.9, rubber crumbs of 5–2.5 mm fraction 0.265–1.255, rubber crumbs of 2.5–1.25 mm fraction 1.59–7.560, rubber crumbs of 1.25–0.63 mm fraction 1.59–7.560, rubber crumbs of 0.63–0.315 mm fraction 1.59–7.560, rubber crumbs of 0.315–0.16 mm fraction 0.265–1.255, water – the rest.

EFFECT: invention can be used in production of sound-absorbing partition walls and panels, sound-absorbing mortar for internal parts of a building.

1 cl, 1 dwg