FIELD: construction; chemistry.
SUBSTANCE: invention relates to an additive for hydraulically setting compounds, comprising a colloidally dispersing preparation of at least one water-soluble salt of a multivalent metal cation, at least one compound, which is capable of releasing an anion that forms a poorly soluble salt together with the multivalent metal cation, and at least one polymer dispersant which comprises anionic and/or anionogenic groups and polyether side chains, to a method for preparing an additive, to a building mixture, containing said additive, and to the use of said additive. Invention is developed in subclaims.
EFFECT: additive for hydraulically setting compositions is proposed.
16 cl, 5 tbl
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