FIELD: chemistry.
SUBSTANCE: claimed invention represents method for manufacturing sand composition for application in hydratable binding agents, in which particles of industrially manufactured sand are preliminarily processed with polycationic compound, extenuating clay influence, and are mixed with natural sand particles, which are washed to remove fraction of very small particles so that, at least, 90% of natural sand particles remain on 75 micron sieve. Invention is developed in dependent items of invention formula.
EFFECT: invention relates to hydratable binding composition and to method of reducing clay influence on concrete compositions.
8 cl, 2 dwg, 1 tbl
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