FIELD: chemistry.
SUBSTANCE: invention relates to a method for preparing a hardening accelerator composition by reacting a water-soluble calcium compound with a water-soluble silicate compound, the reaction is carried out in the presence of an aqueous solution, which contains a plasticizer suitable for hydraulic binders, wherein the said reaction is carried out in the presence of apatite and a molar ratio of calcium to phosphorus in the hardening accelerator is of 25/1 to 400/1. The invention also relates to an accelerator composition and to a mixture of building materials comprising an accelerator prepared by the above method, in addition, the invention relates to the use of the said accelerator in mixtures of building materials. The invention is developed in dependent claims of the invention formula.
EFFECT: preparing a more efficient hardening accelerator.
24 cl, 1 dwg, 3 tbl
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