FIELD: chemistry.
SUBSTANCE: invention relates to the industry of construction materials. The crude mixture for making coarse aggregate coating contains the following, wt %: portland cement 30.0-34.0; urea 0.1-0.2; casein adhesive 2.0-2.6; superplasticiser S-3 1.0-1.4; quartz sand ground until complete passage through sieve 014 27.9-28.8; water 34.0-38.0. In another version, the crude mixture for making coarse aggregate coating contains the following, wt %: portland cement 30.0-34.0; urea 0.1-0.2; casein adhesive 2.0-2.6; superplasticiser S-3 1.0-1.4; scrap ceramic articles ground until complete passage through sieve 014 27.9-28.8; water 34.0-38.0.
EFFECT: high strength of adhesion of the coating to the surface of the coarse aggregate.
2 cl, 2 tbl
