Patent · US Active

Hardening accelerator containing ettringite and calcium silicate hydrate

US9676666B2 · kind B2 · utility

1Cited by

3References

22Claims

0Family size

Assignee

BASF Construction Solutions GmbH · DE

Inventors

Christoph Hesse · Ebersberg, DE
Niklas Loges · Pittenhart, DE

Key dates

Filing date	Aug 22, 2014
Grant date	Jun 13, 2017
Priority date	—
Expiry date	Aug 22, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/91
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention concerns a process for the preparation of a calcium silicate hydrate and ettringite containing hardening accelerator composition by reaction of a water-soluble calcium compound, silicate compound, aluminum compound and a sulfate compound, wherein the molar ratio of silicon to sulfate is from 2/1 to 30/1 and the reaction of the four compounds being carried out in the presence of an aqueous solution which contains a comb polymer suitable as a plasticizer for hydraulic binders. Also concerned are the use of said accelerators in building material mixtures, the building material mixtures containing said accelerators and a process for the preparation of a sprayable binder composition in which said accelerators are used.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.