BINDER Russian patent published in 2009 - IPC C04B7/14 

FIELD: construction.

SUBSTANCE: binder produced by grinding of mixture that contains the following components, wt %: blast-furnace slag 40-45; calcium sulfate dihydrate 4-9; mountain sand of the following composition, wt %: CaO 11.3-13.7; MgO 4.2-5.7; Al₂O₃ 9.8-11.0; SiO₂ 34.1-39.9; FeO 12.8-26; MnO 0.3-0.55; SO₃ 1.7-3.2; Na₂O+K₂O 1.3-3.2, containing 10-20% minerals of garnets, 4-9; slag from melting of ferrochromium - the rest, besides grinding of mixture is carried out down to specific surface of 450 m²/kg.

EFFECT: higher strength, frost resistance and moisture resistance of binder.

2 tbl