COMPLEX ADDITIVE Russian patent published in 2014 - IPC C04B24/02 C04B24/18 C04B22/08 

FIELD: chemistry.

SUBSTANCE: invention relates to field of construction materials, in particular to compositions of additives, used in production of articles from slow-moving and rigid concrete mixtures with application of technologies of classical vibrational moulding, extrusion moulding and vibropressing. Complex additive includes additives of plasticising and air-entraining action. As additive with plasticising action used are lignosulphonates, with additional introduction into it of accelerator of hardening and regulator of thixotropic properties. Complex additive contains said components with the following ratio, (wt %): lignosulphonate - 30-70; additive with air-entraining action - 2-7; accelerator of hardening - 15-60; regulator of thixotropic properties - 5-15. as additive with air-entraining action, used are alkylsulphates, alkylsulphonates, ethoxylated fatty alcohols, salts of sulphoethoxylated fatty alcohols or mixture of any said compounds. as accelerator of hardening, used are sodium rhodanide, sodium thioculphate, sodium sulphate, sodium or calcium formiate, alkanolamines or mixture of two or more said compounds.

EFFECT: claimed complex additive provides required thixotropic properties of slow-moving and rigid concrete mixtures and accelerates acquirement of strength.

3 cl, 1 tbl