METHOD OF FOAM CONCRETE PREPARING Russian patent published in 1994 - IPC

FIELD: building industry. SUBSTANCE: method involves foam mass preparing by stirring of water (40-45% of total quantity), aluminium foil waste production and alkaliless glass (specific surface is 2000-2500 сm²/g) at the stirring rate 800-850 rev/min. Then preliminary prepared fluid consisting of the water residue, surface-active substance and alkaline glass (specific surface is 4200-5000 cm²/g) is added to the foam mass and stirred at the rate 500-600 rev/min. Components are added at the following ratio, wt.-%: alkaliless glass 8-12; alkaline glass 50-56; waste of aluminium foil production 4-6; surface-active substance 0.03-0.04, and water - the rest. Then articles are shaped and settled under normal conditions for 1-2 h, and subjected for autoclave treatment by regime 2-3, 5-2 h at 8 atm. Properties: foam concrete density is 700 kg/cm³, strength is 7,6-7,8 kg/cm³, heat conductivity is 0,12-0,14 Wt/m². EFFECT: enhanced quality of foam concrete. 2 tbl