HYDRAULIC BINDING AGENT BASED ON SULFO-ALUMINOUS CLINKER AND PORTLAND CEMENT CLINKER Russian patent published in 2014 - IPC C04B7/32 C04B7/02 C04B28/02 C04B111/20 

FIELD: chemistry.

SUBSTANCE: claimed invention relates to composition of binding agent based on sulfoaluminous clinker and Portland cement clinker and can be applied in industry of construction materials in production of concrete and building elements from concrete. Composition contains, at least, in wt %, relative to total composition weight: from 1 to 99% of Portland cement clinker or Portland cement and from 99 to 1% of belite-calcium-sulfoaluminous-ferrite clinker (BCSAF), which contains, at least, in wt %, with respect to total weight of BCSAF clinker: from 5 to 30% of phase of calcium aluminoferrite composition, corresponding to general formula C₂A_xF_(1-x), with x in the range from 0.2 to 0.8, from 10 to 35% of phase of calcium sulfoaluminate "yelimite" C₄A₃S from 40 to 75% of belite (C₂S), from 0.01 to 10% of one or several secondary phases, selected from calcium sulfates, sulfates of alkali metals, perovskite, gehlenite, free lime and periclase and/or glass-like phase, and total percent composition of said phases of which is higher or equals 97%. Invention also relates to concretes and building elements from it, obtained with application of claimed composition.

EFFECT: preservation or increase of strength, including early terms of hardening.

15 cl, 4 tbl