Method for selecting a pozzolan intended to be incorporated into a composite material comprising cement and glass

摘要

According to the invention a pozzolan is selected which exhibits a capacity for fixing lime during the Chapelle test at 90 DEG C. greater than 700 mg of CaO per gram of pozzolan, a capacity for fixing lime during the Chapelle test at 50 DEG C. greater than 200 mg of CaO per gram of pozzolan and a ratio of the quantity of CaO fixed during the 50 DEG 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.