FIELD: chemistry.
SUBSTANCE: invention relates to a method of preparing a hardening accelerator composition by reacting a water-soluble calcium compound with a water-soluble silicate compound and a method of preparing a hardening accelerator composition by reacting a calcium compound with a silicon dioxide-containing component in an alkaline medium, in both cases the reaction of the water-soluble calcium compound with the water-soluble silicate compound being carried out in the presence of an aqueous solution which contains a water-soluble comb polymer suitable as a plasticiser for hydraulic binders. The invention also relates to a composition of calcium silicate hydrate and comb polymer, use thereof as a hardening accelerator and for reducing permeability of hardened mixtures.
EFFECT: obtaining a hardening accelerator having plasticiser properties, which is capable of increasing strength and wear resistance.
41 cl, 12 tbl, 3 dwg
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