ADDITIVE FOR CONCRETE MIXTURE Russian patent published in 2010 - IPC C04B24/18 C04B103/14 C04B103/60 

FIELD: construction industry.

SUBSTANCE: invention refers to construction materials and can be used as additive for concretes and building mortars. Additive for concrete mixture includes the following, wt %: after-yeasty grains with content of dry matters - 4-5 wt %, pH - 5.0-6.0, density - 1.016 g/cm³ 94.00-96.10, sodium fluoride 0.45-0.50, potassium bichromate 0.45-0.50, calcium hydroxide 3.00-5.00.

EFFECT: improving strength at compression in early and design phase, decreasing water absorption and increasing cold resistance of concrete and building mortar.

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