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

FIELD: chemistry.

SUBSTANCE: invention relates to a method of preparing a concrete mixture and can be used in construction. In the method of preparing a concrete mixture, a catholyte is first poured into a turbulent mixer-activator in amount of 40-70% of the calculated prescribed dose of the tempering liquid, said catholyte having (pH)_cath in the range 9≤(pH)_cath≤13.5, which, when pouring, is passed at a rate of 1-2 m/s through an transverse magnetic field with field strength of 500-2000 Oe; cement is then poured into the turbulent mixer-activator, where particles of said cement are charged with a positive electrostatic charge when pouring, for which the cement is passed through a gauze electrode at a positive high voltage of 10-12 kV; the magnetic catholyte is then mixed with said cement in the turbulent mixer-activator while heating with a current uniformly distributed in the volume of the cement paste. The remaining portion of the tempering liquid from the calculated dose is poured into the concrete mixer with the aggregate while simultaneously pouring the tempering liquid into the turbulent mixer-activator, where said tempering liquid is said catholyte or anolyte having (pH)_an in the range 1.5≤(pH)_an≤6.5, where said tempering liquid is also passed at a rate of 1-2 m/s through a transverse magnetic field with field strength of 500-2000 Oe; after mixing and heating the cement paste suspension to given temperature, it is also poured into the concrete mixer and said mixture is finally stirred.

EFFECT: faster hardening, high strength of the concrete.

2 dwg