COMPLEX ADDITIVE TO CONCRETE MIXTURE Russian patent published in 2009 - IPC C04B24/24 

FIELD: construction industry.

SUBSTANCE: invention can be used for manufacturing concrete and reinforced concrete products, building structures and facilities solidifying under natural conditions at positive and negative ambient temperatures or under steam curing conditions. Complex additive for concrete mixture includes acetone-formaldehyde resin - ATsF, besides, it also consists of non-organic hardener and plasticising agent C3. Resin is pre-modified by adding a reducing agent - alkali metal hydroborate in quantity of 20-40% of ATsF mass, and components are taken in the following ratio, g/l of water: acetone-formaldehyde resin 20-50; non-organic hardener 50-95; plasticising agent C3 70-110.

EFFECT: reducing the coagulating period and speeding up structure formation of hardened cement paste and developing strength within early hardening periods.

2 cl, 2 tbl