FIELD: chemistry.
SUBSTANCE: invention relates to compositions of chemical additives for concrete mixtures and mortar and can be widely used in producing monolithic and prefabricated structures, mainly for hydraulic engineering structures and road concrete. The additive contains superplasticiser S-3 and glycerine, with the following ratio of components (pts.wt): superplasticiser S-3 - 35-95; glycerine - 5-65. The additive can additionally contain carbamide in amount of 5-45 pts.wt per 100 pts.wt of the main composition.
EFFECT: high frost-resistance of concrete, high strength.
2 cl, 1 tbl, 5 ex
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