COMPLEX ADDITIVE FOR HEAVY CONCRETE MIXTURES Russian patent published in 2015 - IPC C04B24/18 C04B103/60 

FIELD: chemistry.

SUBSTANCE: invention relates to the composition of a complex additive. A complex additive for heavy concrete mixtures, which includes technical lignosulphonates and montmorillonite-containing clay, further contains a deactivated catalyst for dehydrogenating cyclohexanol from ε-caprolactam production and a product of combined dispersion to particle size smaller than 10^-2 mcm of montmorillonite-containing clay and ε-caprolactam in ratio of 1/0.5 and castor oil and technical hydrogenated fat in ratio of 1/1, with the following ratio of components, wt %: technical lignosulphonates 63-70, deactivated catalyst for dehydrogenating cyclohexanol from ε-caprolactam production 5-7, montmorillonite-containing clay 16-18, ε-caprolactam 8-9, castor oil 0.5-1.5, technical hydrogenated fat 0.5-1.5.

EFFECT: longer periods for the beginning and end of hardening heavy concrete mixtures, high ultimate compression strength of the concrete, high consistency of the concrete mixture and low water absorption of the concrete.

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