BINDER Russian patent published in 2014 - IPC C04B28/14 C04B18/04 

FIELD: construction.

SUBSTANCE: invention relates to construction materials, namely to composition of gypsum binders, and may be used to produce construction products, and also in monolithic house building. A binder comprises construction gypsum (β-CaSO₄·0.5 H₂O), iron-containing wastes of gas cleaning of domain furnaces (flue dust with specific surface of 1900-1920 cm²/g), caustic magnesite, magnesium chloride salt (MgCl₂), introduced with a solution of bischofite (with density of 1.1 g/cm³) to normal thickness, and a silica-alumina additive (haydite dust) at the following ratio of all components, wt %: construction gypsum (β-CaSO₄·0.5 H₂O) 78.4-89.3, flue dust 1.9-1.91, caustic magnesite 0.95-1.0, haydite dust 2.85-14.35, magnesium chloride (MgCl₂) 4.34-5.0.

EFFECT: increased strength in compression after two hours and simplified technology of preparation without reduction in water resistance, specifically, softening coefficient.

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