COMPLEX ADDITIVE FOR CONCRETES AND MORTARS (VERSIONS) Russian patent published in 2014 - IPC C04B24/02 C04B24/14 C04B24/18 C04B22/08 C04B103/14 

FIELD: chemistry.

SUBSTANCE: claimed invention relates to composition of additive to concretes and mortars and can be applied in production of concrete and reinforced concrete products and constructions with concreting in wide range of environment temperature. In accordance with the first version complex additive for concrete and mortars contains polyalcohols and sodium sulphate, with additional introduction into it of sodium thiosulfate and rhodanide. Claimed complex additive contains said components with the following ratio, (wt %): polyalcohols - 30-80; sodium sulphate - 10-20; mixture of sodium thiosulfate and rhodanide - 10-50. Sodium nitrite can be additionally introduced into complex additive. In accordance with the second version complex additive for concretes and mortars contains polyalcohols and sodium formiate. It additionally contains acyclic, mono- or polycyclic amines with length of hydrocarbon radical C₁-C₃. Complex additive contains said components with the following ratio (wt %): polyalcohols - 30-70; sodium formiate - 15-25; acyclic, mono- or polycyclic amines - 15-45. Sodium nitrite can be additionally introduced into composition of complex additive.

EFFECT: obtaining complex additive for concretes and mortars with lower temperature of crystallisation, which does not impair indices of preservation of mobility of plasticised concrete mixtures, providing stable acquirement of strength in the entire range of temperatures, including negative ones.

4 cl, 3 tbl