Residual Properties of Concrete Heated Rapidly

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Title: Residual Properties of Concrete Heated Rapidly

Author(s): K. D. Hertz

Publication: Special Publication

Volume: 92

Issue:

Appears on pages(s): 143-152

Keywords: compressive strength; concretes; fire tests; heating; high temperature tests; microwaves; thermal insulation

Date: 6/1/1986

Abstract:
The paper describes a new technique developed by the author for heating concrete rapidly by application of microwave power. Using an appropriate thermal insulation it is found to be possible to heat dry concrete specimens 10°C per minute and 20°C per minute avoiding the development of thermal stresses within the specimens. A series of 90 specimens has been heated 10°C per minute to various maximum temperature levels. The residual compressive strength was measured, and the results are compared to the similar results of the same concrete heated slowly. Applications for the technique are outlined, and a possible future development; is presented.