COMPOSITION OF CRUDE MIXTURE FOR MAKING NATURALLY HARDENING, NON-AUTOCLAVED FOAMED CONCRETE AND METHOD OF PRODUCING CRUDE MIXTURE FOR MAKING NATURALLY HARDENING, NON-AUTOCLAVED FOAMED CONCRETE Russian patent published in 2013 - IPC C04B38/02 C04B38/10 

FIELD: chemistry.

SUBSTANCE: composition of a crude mixture for making naturally hardening, non-autoclaved foamed concrete contains, wt %: portland cement 63.03-66.06, synthetic foaming agent 0.15-0.21, gasifier containing 80% active aluminium with particle size not greater than 100 nm and 20% polyethylene glycol, 0.68-0.74, water 33.04-36.07. The composition further contains a modifying nanocrystalline additive- corundum in amount of 0.02-0.3 wt % of the weight of portland cement. The method of producing the composition according to claim 1 involves feeding and stirring in a mixer, first the foaming agent with a portion of water and portland cement and then a suspension of said gasifier and a portion of water into the obtained mass while stirring. The modifying nanocrystalline additive - corundum in amount of 0.02-0.3 wt % of the weight of portland cement then added to said suspension.

EFFECT: high strength with low density and heat conductivity, obtaining foamed concrete with an optimised pore structure.

4 cl, 2 ex, 7 tbl