METHOD OF PREPARING CONCRETE MIXTURE Russian patent published in 2012 - IPC C04B40/00 B28C5/00 

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of preparing concrete mixtures and articles therefrom. In the method of preparing a concrete mixture, involving mixing a portion of hardening liquid with cement in a turbulence mixer-activator, and simultaneous electrical heating thereof using current from an industrial network to a given temperature, adding the remaining portion of the hardening liquid into a concrete mixer with filler, followed by adding the obtained heated suspension into the concrete mixer and final stirring of the obtained mixture, an anolyte in volume of (40-70)% of the hardening liquid is first poured into the turbulent mixer-activator, said anolyte having (pH)_an in the range of 1.5≤(pH)_an≤6 which, in the process of pouring into the turbulent mixer-activator, is passed at a speed of (1-2) m/s through a transverse magnetic field with strength of (500-2000) Oe, after which cement is poured into the turbulent mixer-activator, where during the filling process, the cement particles are charged with a negative electrostatic charge, for which the cement is passed through a gauze electrode across which a high negative voltage is applied, the absolute value of which lies in the range of (10-12) kV, the magnetic anolyte is then mixed with the electrostatically charged cement particles in the turbulent mixer-activator, simultaneously with pouring the hardening liquid into the turbulent mixer-activator, the remaining portion of the hardening liquid is poured into the concrete mixer with filler, said hardening liquid being said anolyte or catholyte, having (pH)_cat lying in the range of 9≤(pH)_cat≤13.5, where said hardening liquid - anolyte or catholyte when pouring into the concrete mixer with filler is also passed at a speed of (1-2) m/s through a transverse magnetic field whose strength lies in the range of (500-2000) Oe, and after stirring and heating the suspension - cement paste to given temperature, it is also poured into the concrete mixer and the obtained mixture is finally stirred.

EFFECT: high degree of hydration, rate of hardening and strength of the concrete stone.

1 dwg, 1 ex