Plasticizer-containing hardening accelerator composition

摘要

The invention concerns a process for the preparation of a hardening accelerator composition by reaction of a water-soluble calcium compound with a water-soluble silicate compound, 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 plasticizer for hydraulic binders and characterized in that the weight ratio of water to the sum of calcium compound and silicon dioxide containing component is from 2 to 10. The invention concerns also a composition of calcium silicate hydrate and comb polymer and its use as hardening accelerator.