| abstract |
FIELD: construction. n SUBSTANCE: invention relates to production of building materials and can be used in manufacture of lightweight concrete and structural products from it. Raw material mixture for production of lightweight concrete includes, by weight: Portland cement 33, sand 13, highly disperse sand additive obtained by preliminary mechanical grinding of sand to a mass average particle size of 2.0 ± 0.2 mcm, 20, 1N hydrochloric acid solution 21, water 13, when preparing a concrete mixture, dry components are first mixed, then the mixture is made with water and acid. n EFFECT: increase the strength characteristics of concrete with a decrease in its density. n 1 cl, 1 tbl |