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. 19, 1991
Filed:
Jul. 06, 1989
Jacques Thiery, Villers-Les-Nancy, FR;
Pascal Soukatchoff, Lay Saint Christophe, FR;
Vetrotex Saint-Gobain, Chamberry, FR;
Abstract
According to the invention a pozzolan is selected which exhibits a capacity for fixing lime during the Chapelle test at 90.degree. C. greater than 700 mg of CaO per gram of pozzolan, a capacity for fixing lime during the Chapelle test at 50.degree. C. greater than 200 mg of CaO per gram of pozzolan and a ratio of the quantity of CaO fixed during the 50.degree. C. Chapelle test to the specific surface area of the pozzolan which is greater than about 10 mg of CaO per square meter of pozzolan. The composite material obtained is used in construction to produce facade elements, for example, which have improved resistance to aging.