METHOD OF PRODUCTION OF SULFATE SILICATE PRODUCT Russian patent published in 2004 - IPC

FIELD: manufacture of building materials; manufacture of fast-setting high-strength cement, manufacture of concrete and reinforced concrete articles; sorbents and catalysts in chemical industry.

SUBSTANCE: proposed method includes burning of mixture containing alumino-silicate material, sulfating modifying agent-concentrated sulfuric acid and water; use is made of zeolite-containing stock of the following composition, mass-%: SiO₂, 58.66-70.87; Al₂O₃, 8.98-12.34; Fe₂O₃, 4.37-6.24; CaO, 10.64-14.51; MgO, 1.84-2.14; K₂O, 2.48-3.05; TiO₂, 0.481.65; Na₂O, 0.2-0.85; P₂O₅ 0.14-0.56 at the following relationship of components, mass-%: zeolite-containing stock, 40.00-50.00; concentrated sulfuric acid, 25.00-30.00; the remainder being water Burning is performed at temperature of 480-500 C for 20-59 minutes.

EFFECT: enhanced strength of cement compositions; low cost of process.

2 tbl