FIELD: chemistry.
SUBSTANCE: invention concerns construction material industry, particularly method of obtaining hydroactivated cinereous composition astringent based on flue ash, a waste of heat-and-power engineering, which can be used in production of corrosion-resistant concrete, solid and foamed silicate concretes and goods based on them. Method of obtaining hydroactivated cinereous composition astringent involves joint grinding of flue ash and water-free sodium silicate in the presence of water, till specific surface area reaches 400-500 m2/kg at the following component rate, wt %: flue ash 65-75, water-free sodium silicate 25-35, water sufficient to reach water cementitious ratio of 0.34-0.37.
EFFECT: enhanced durability properties, reduced production cost, unnecessary adding of additives, shortened heat processing mode.
3 ex, 6 tbl
