FIELD: construction industry; production of cement concretes and mortars.
SUBSTANCE: the invention is pertaining to the field of construction industry, in particular, to production of cement concretes and mortars applied in production of construction materials. The chemical addition agent for cement concretes and mortars contains(in mass %): technical lignosulphonates - 20-30, sodium chloride - 20-53, sodium tetraborate - 2-5, super plasticizer C-3 - the rest. The technical result - decreased consumption of the addition agent introduced into the cement concretes and mortars at an increase of their strength, prolonged retention of mobility of the concrete mixtures and mortars.
EFFECT: the invention allows to decrease consumption of the addition agent introduced into the cement concretes and mortars at an increase of their strength, prolonged retention of mobility of the concrete mixtures and mortars.
2 ex
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