SELF-LEVELLING CONCRETE MIXTURE Russian patent published in 2014 - IPC C04B28/02 

FIELD: chemistry.

SUBSTANCE: invention relates to powders for obtaining a self-levelling freshly-prepared concrete mixture. The powder contains, wt %: from 94% to 99% of particles of at least one fire-proof material, whose main component is represented by aluminium oxide and/or zirconium dioxide, and/or silicon dioxide; from 1% to 6% of hydraulic cement; from 0 to 0.03% of organic fibres; optionally from 0.075% to 1%, preferably from 0.1% to 1% of a surface-active substance; and optionally a setting accelerator, with the fraction of particles, possessing the size less than 40 mcm, being distributed relative to the powder mass in the following way, wt %: fraction <0.5 mcm - ≥4%, fraction <2 mcm - ≥5%, fraction <10 mcm - ≥16%, fraction <40 mcm - 29-45%, and a part of zirconium dioxide in the fraction of particles with the size less than 10 mcm, called "fine fractions", is in the range from 35 wt % to 75 wt % relative to the total weight of the said fraction.

EFFECT: improvement of the concrete mixture self-levelling.

24 cl, 6 tbl