METHOD OF PREPARING CONCRETE MIXTURE Russian patent published in 2020 - IPC C04B40/00 C04B28/04 C04B14/06 C04B24/26 C04B111/20 

FIELD: technological processes.

SUBSTANCE: in the method of preparing a concrete mixture, involving mixing cement, fillers, a superplasticiser and tempering water, first, into a concrete mixer a fine aggregate is charged, which is a mixture of natural quartz sand with a fineness modulus of up to 1.5 and screening of 0–5 mm fraction with a fineness modulus of not less than 2.5 at the following ratio (wt%): (40–50):(50–60), and as super plasticizer complex polycarboxylate-based superplasticizer and part of tempering water in amount of 55–65 % of its total flow rate and premixed therein for 80–90 s, then coarse aggregate, cement and the rest part of tempering water are loaded into concrete mixer, after which concrete mixture is finally mixed for 50–60 s.

EFFECT: disclosed is a method of preparing a concrete mixture.

1 cl, 1 tbl