FIELD: construction.
SUBSTANCE: complex plasticising additive for the concrete mixture, containing the polyelectrolytes of anionic type based on water-soluble carboxylate polymers, also comprises polyelectrolyte of cationic type based on one of a number of water-soluble amino-substituted polymers: polidimetildiallil ammonium chloride, the product of polymerisation of etilhlorgidrine with dimethylamine and chitosan at the following ratio of components, wt %: polyelectrolytes of anionic type 18-30, polyelectrolytes of cationic type 2-15, water - the rest up to 100%.
EFFECT: increase of preservation ability of the concrete mixture mobility at least during three to four hours and increase of the concrete strength.
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