The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 2011
Filed:
Oct. 12, 2006
Ara A. Jeknavorian, Chelmsford, MA (US);
Hideo Koyata, Atsugi, JP;
Darrick B. Mcguire, Arlington, MA (US);
Ivana Jovanovic, Boston, MA (US);
Ara A. Jeknavorian, Chelmsford, MA (US);
Hideo Koyata, Atsugi, JP;
Darrick B. McGuire, Arlington, MA (US);
Ivana Jovanovic, Boston, MA (US);
W.R. Grace & Co.-Conn., Columbia, MD (US);
Abstract
The present invention relates to dispersants such as superplasticizers for hydratable cementitious compositions, and more particularly to methods for achieving variable degrees of longer slump life in concrete and mortar without loss of stability. This is achieved by using two admixture systems. The first admixture composition has multi-components for achieving initial-slump-enhancement, later-slump-retention, and limiting initial slump. The second admixture composition has the later-slump-enhancing component. Alternatively, conventional water reducers or superplasticizers can be employed initially, followed by the later-slump-enhancing admixture composition.