Method for selecting a pozzolan intended to be incorporated into

Details Method for selecting a pozzolan intended to be incorporated into Method for selecting a pozzolan intended to be incorporated into

1989-07-06

1991-02-19

Group, Karl

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

106701, 106718, C04B 1444

Patent

active

049941143

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.

REFERENCES:
patent: 3852082 (1974-12-01), Majumdar
patent: 4640715 (1987-03-01), Heitzmann et al.
patent: 4642137 (1987-02-01), Heitzmann
patent: 4687752 (1987-08-01), Peters
patent: 4793861 (1988-12-01), Sohm
Chemical Abstracts, vol. 102, No. 20, 171585(Y).
Benoit, M., "Determination de l'Activite Pouzzolanique d'Une Pouzzoalne par voie Chimique," 26 Bull. Liaison Labo. Routiers P. et Ch., D1-D5 (1967).
Largent, "Estimation de l'Activite Pouzzolanique,": 93 Bull. Liaison Labo. P. et Ch., 61 (1978).
British Standard Methods for Determining Properties of Glass Fibre Reinforced Cement Material, No. 6432 (1984).
Chemical Abstracts, vol. 98, No. 18 (Oct. 1982), Abstract No. 148630Z.

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