RAW MATERIAL MIXTURE FOR MANUFACTURING OF WALL BUILDING ARTICLES Russian patent published in 1997 - IPC

FIELD: building materials production. SUBSTANCE: raw material mixture comprises, mas. %: crushed quartz sand, 51.8-54.7; sodium silicium-fluoride, 5.13-5.41; liquid sodium glass, 30.8-32.5; frothing agent, 3.94-4.15; bis(alkylpolyoxyethylene)phosphate having formula [C_nH_2n+1O(C₂H₄O)₂•POH, where n= 8-10 used as additive, 1.29-1.37; water, the balance. Neutralized product of treatment of asphalt with sulfuric acid is used as mentioned above frothing agent. Bulk density of articles is 460-850 kg/m³, their compressive strength is 6.2-15.0 MPa, heat conductivity is 0.14-0.42 Wt/m K and acid-resistance is 97-98 %. EFFECT: improved quality. 2 tbl