Method for selecting a pozzolan intended to be incorporated into a composite material comprising cement and glass
US4994114A · kind A · utility
5Cited by
5References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1989 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Jul 6, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/0088
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.