FIELD: manufacture of building materials.
SUBSTANCE: super-plasticizer for commercial cast-in-place concrete contains (i) neutralized formaldehyde homopolymerization products, obtained via autocatalized polymerization of formaldehyde in presence of calcium hydroxide, and (ii) alkali or alkali metal salts of polyhydoxycarboxylic acids having general formula R(CHOH)nCOOH, wherein n ≥ 2 and R represents COOH or CH2OH, at (i)/(ii) weight ratio 1:(0.05-0.2).
EFFECT: increased longevity of plasticized concrete mixes without retardation in the early-phase strengthening.
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