Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...
Patent
1978-12-22
1981-05-19
Peters, G. O.
Compositions: coating or plastic
Coating or plastic compositions
Metal-depositing composition or substrate-sensitizing...
106 89, C04B 1502
Patent
active
042683173
ABSTRACT:
A lightweight insulative, structural concrete is produced from a cement mix containing lightweight aggregates having precisely defined physical and chemical properties. These aggregates are very low in density and very high in amorphous SiO.sub.2 content. The concrete product produced using the mix of this invention has a unique combination of high structural strength (up to 3400 psi, 28-day compressive), low density (50 to 110 pounds per cubic foot) and high thermal resistance (R) values (up to 3.16/inch). Such a product is just as strong, one half the weight, and 36 times more insulative than ordinary hard rock concrete.
REFERENCES:
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patent: 2250107 (1941-07-01), Nelles
patent: 4002788 (1977-01-01), Lott
patent: 4017321 (1977-07-01), Reighter
patent: 4031684 (1977-06-01), Shibata
patent: 4105459 (1978-08-01), Mehta
Rudnai, G., Lighweight Concretes, Hung. Acad. Sci, Budapest, 1963, pp. 93-96, 139-147.
Orchard, D. F., Concrete Technology, vol. 1, John Wiley & Sons, N.Y., 1973, pp. 103-105.
Lea, F. M., Chem. of Cement & Concrete, Edward Arnold Ltd., London, 1956, pp. 358-363, 369 & 379-393.
Johns Manville Technical Bulletin, BMM 364-Apr. 1941.
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