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:
Feb. 22, 2005
Filed:
Apr. 26, 2002
Xuan Zhang, Woburn, MA (US);
Josephine Ho-wah Cheung, Waltham, MA (US);
Ara Avedis Jeknavorian, Chelmsford, MA (US);
Xuan Zhang, Woburn, MA (US);
Josephine Ho-Wah Cheung, Waltham, MA (US);
Ara Avedis Jeknavorian, Chelmsford, MA (US);
W. R. Grace & Co.-Conn., Columbia, MD (US);
Abstract
An exemplary admixture system for cementitious compositions, comprises a polycarboxylic acid type water reducer and a tertiary amine defoamer having an average molecular weight of 100-1500 and more preferably 200-750. The defoamer permits a stable admixture formulation and helps to achieve a controllable level of entrained air in a concrete mix. Cementitious compositions and methods for modifying the same, using the tertiary amine defoamers, are also described herein.