COMPLEX ADDITIVE FOR CONCRETE MIXTURES AND MORTAR Russian patent published in 2013 - IPC C04B24/24 C04B24/02 C04B103/60 

FIELD: chemistry.

SUBSTANCE: invention relates to composition of a complex additive for concrete mixtures and mortar and can be widely used in production of monolithic and prefabricated structures, primarily for hydraulic engineering structures and road concrete. The complex additive contains the following, (pts.wt): superplasticiser S-3 10-30, polyethylene glycol and/or propylene glycol with molecular weight of 250-3500 5-55, carbamide 10-60. In a special case, the complex additive further contains sodium formate, with the following ratio of components (pts.wt): superplasticiser S-3 10-30, polyethylene glycol and/or propylene glycol 5-55, carbamide 10-60, sodium formate 5-35.

EFFECT: high frost resistance of concrete in salts and high strength of concrete aged 28 days while maintaining and slightly improving properties, particularly cone slump.

5 ex, 1 tbl