FIELD: chemistry.
SUBSTANCE: present invention relates to a dispersant composition for a hydraulic composition, which contains alkyldiethanolamine having an alkyl group with 1-3 carbon atoms, and a condensate of naphthalenesulphonic acid and formaldehyde, wherein the weight ratio of the alkyldiethanolamine having an alkyl group with 1-3 carbon atoms to the condensate of naphthalenesulphonic acid and formaldehyde ranges from 0.01 to 2.0. The invention also relates to an aqueous solution containing said dispersant, as well as to a hydraulic composition containing an alkyldiethanolamine having an alkyl group with 1-3 carbon atoms, a condensate of naphthalenesulphonic acid and formaldehyde, hydraulic powdered material, an aggregate and water, where the hydraulic powdered material contains SO3 in amount of 0.5-6.0 wt % and the weight ratio of the alkyldiethanolamine having an alkyl group with 1-3 carbon atoms to the condensate of naphthalenesulphonic acid and formaldehyde (alkyldiethanolamine/condensate of naphthalenesulphonic acid and formaldehyde) ranges from 0.01 to 2.0. The invention also relates to use of said dispersant to improve mobility retention of the hydraulic composition. The invention is developed in subclaims.
EFFECT: longer working life of the hydraulic composition and higher strength of the hardened hydraulic composition.
15 cl, 7 tbl
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