RAW MIXTURE FOR PREPARATION OF CELLULAR CONCRETE Russian patent published in 2003 - IPC

FIELD: compounds for preparation of non-autoclave cellular concrete used in building structures. SUBSTANCE: proposed raw mixture includes fly ash, aluminum powder and mixing liquid water glass prepared on base of microsilica at density of 1.4 g/cu cm, specific surface of 25000 sq cm/g and density of amorphous SiO₂ of 90 to 95% by direct dissolving in alkali solutions at one stage at atmospheric pressure and temperature of up to 100 C; procedure is continued during 40 to 120 minutes; relationship of components is as follows, mass-%: water glass, 44-46; aluminum powder, 3-7 and fly ash, 49-51. EFFECT: facilitated procedure; enhanced crack resistance; low cost with no impairment of physico-mechanical properties. 2 tbl, 1 ex