Plasticizer-containing hardening accelerator composition

US8653186B2 · kind B2 · utility

Assignee

• CONSTRUCTION RESEARCH & TECHNOLOGY GMBH · DE

Inventors

• Luc Nicoleau · Fleury-les-Aubrais, FR
• Gerhard Albrecht · Prien am Chiemsee, DE
• Klaus Lorenz · Zangberg, DE
• Eva Jetzlsperger · Garching bei München, DE
• Daniel Fridrich · Tönning, DE
• Thomas Wohlhaupter · Burg (Dithmarschen), DE
• Reinhard Dorfner · Kirchweidach, DE
• Hubert Leitner · Traunwalchen, DE
• Mario Vierle · Günzburg, DE
• Dirk Schmitt · Sulzburg, DE
• Michael Braeu · Traunstein, DE
• Christoph Hesse · Ebersberg, DE
• Sabrina Montero Pancera · Viernheim, DE
• Siegfried Zuern · Eurasburg, DE
• Michael Kutschera · Neustadt, DE

Key dates

• Filing date: Sep 2, 2009
• Grant date: Feb 18, 2014
• Expiry date: Dec 28, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/91
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

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 and a process for the preparation of a hardening accelerator composition by reaction of a calcium compound with a silicon dioxide containing component under alkaline conditions, 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 plasticizer for hydraulic binders. The invention concerns also a composition of calcium silicate hydrate and comb polymer, its use as hardening accelerator and for the reduction of the permeability of hardened compositions.