RAW MIX FOR PREPARATION OF LIGHT-WEIGHT AIR-ENTRAINED CONCRETE Russian patent published in 1995 - IPC

FIELD: preparation of light-weight air-entrained concrete. SUBSTANCE: raw for preparation of light-weight air-entrained concrete includes cement 220-240 kg/cu.m; gravel of swollen decites 400-500 kg/cu.m; sand of swollen orthophyre 175-220 kg/cu. m, aluminium powder 0.52-0.77 kg/cu.m and water 130-150 kg/cu. m. Raw mix is prepared by mixing sand with cement, adding to the mixture of gravel and, after mixing, the prepared mass is filled with water and subsequently added with aluminium powder during stirring of aqueous suspension. Products manufactured from raw mix are characterized by density in dry state 870-920 kg/cu.m, and water absorption of 9-12%. EFFECT: higher efficiency. 2 tbl