PARTICULARLY RAPIDLY HARDENING POZZOLANIC CEMENT MIXTURES Russian patent published in 2014 - IPC C04B28/22 C04B28/04 

FIELD: chemistry.

SUBSTANCE: invention relates to a pozzolanic cement composition and to a method of its production. The pozzolanic cement composition includes coarser particles of pozzolan and finer particles of hydraulic cement, containing tricalcium silicate, for instance, Portland cement. The particles coarser than 10 mcm, mainly (50%, 65%, 75%, 85% or 95%), are the pozzolan particles, the particles finer than 10 mcm, mainly (50%, 65%, 75%, 85% or 95%), are the particles of hydraulic cement. From excessive calcium of hydraulic cement formed is calcium hydroxide, which reacts with the pozzolan particles, if necessary, in a combination with additional lime. Pozzolanic cement consists of pozzolan at least by 30%, 40%, 45%, 55%, 65% or 75% (relative to taken together particles of pozzolan and hydraulic cement) and less than by 70%, 60%, 55%, 45%, 35% or 25% consists of hydraulic cement. Method of manufacturing the pozzolanic cement composition includes mixing flows of particles of hydraulic cement and pozzolan with the said particle size. The invention is developed in dependent items of the invention formula.

EFFECT: increase of the pozzolan part in the composition with preservation of rapid strength growth.

23 cl, 2 dwg, 18 ex, 5 tbl