CRUDE MIXTURE FOR PREPARATION OF FOAMED CONCRETE Russian patent published in 2019 - IPC C04B38/02 C04B28/24 C04B111/20 

FIELD: construction.

SUBSTANCE: invention relates to the industry of construction materials and can be used for production of structural and heat-insulating foamed concrete. Crude mixture for preparing foam concrete includes, wt%: technical caustic soda 1.75–1.83, aluminum powder 0.12–0.14, water 23.73–24.79, wastes from production of mineral wool sifted through a sieve with cell diameter of 0.63 mm in form of beads, small needles and small welds, with content of crystalline phase in composition of not more than 5 % and acidity module from 1.4 to 1.5, ground to specific surface of 350–400 m²/kg 57.14–69.93, water-retaining additive – cellulose ether Culminal C 8360 0.06–0.12, fine aggregate – wastes from production of mineral wool, sieved through a sieve with a cell diameter of 1.25 mm in form of beads, small needles and small welds, with content of crystalline phase in composition of not more than 40 % and modulus of acidity of 1.4 to 1.5, balance.

EFFECT: high strength characteristics of foamed concrete, low consumption of expensive alkaline and gas-forming components, recycling large-tonnage industrial wastes.

1 cl, 2 tbl