BINDER Russian patent published in 2009 - IPC C04B7/14 

FIELD: construction.

SUBSTANCE: invention is related to construction materials, namely to compositions of clinker-free binder based on blast furnace slag and dump waste slag of ferrous production, which may be used in production of concrete and reinforced concrete products, construction mortars and dry construction mixes. Binder produced by grinding of mix that contains the following components, wt %: blast furnace slag 36-44; calcium sulfate dihydrate 3-6; pit sand of the following composition, wt %: SiO₂ 34.1-39.9; CaO 11.3-13.7; MgO 4.2-9.9; Al₂O₃ 9.8-11.0; S 0.8-1.5; FeO+Fe₂O₃ 12.8-26.1; Na₂O+K₂O 1.3-3.2, containing 10-15% of garnet minerals, 3-6; dump waste slag from melting of ferromanganese - the rest, moreover, mix grinding is carried out to specific surface of 450 m²/kg.

EFFECT: increased strength, frost resistance and chemical activity of binder.

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