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:
Oct. 16, 2001
Filed:
Oct. 13, 1999
Awdhoot V. Kerkar, Chelmsford, MA (US);
Kati Hazrati, Arlington, MA (US);
W. R. Grace & Co.-Conn., New York, NY (US);
Abstract
A composition for improving the freeze thaw durability of masonry concrete comprising (i) an alkylaryl polyether alcohol having the formula R-Ø-(OCH,CH,),OH, wherein R is a C,-C,alkyl group (preferably branched), Ø represents a phenol group, and “X” represents an integer in the range of 3-70; and (ii) at least one efflorescence control admixture, such as a C,-C,fatty acid or its salt or derivative. An exemplary masonry concrete composition of the invention comprises an alkylaryl polyether alcohol having the formula R-Ø-(OCH,CH,),OH, wherein R is a C,-C,alkyl group, Ø represents a phenol group, and “X” represents an integer in the range of 3-70; the composition, when wet, having essentially zero slump when tested by the standard cone method for measuring slump. Methods of improving the freeze-thaw durability of masonry units are also disclosed.