Performance of a Different Pozzolanic Cement Concretes Under Cyclic Wetting and Drying

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Title: Performance of a Different Pozzolanic Cement Concretes Under Cyclic Wetting and Drying

Author(s): A.A. Ramezanianpour, Radfar, Hadikhanloo, Moslehi and Maghsoodi

Publication: Special Publication

Volume: 178

Issue:

Appears on pages(s): 759-778

Keywords: durability; pozzolans; slag; silica fume; trass; wetting and drying tests.

Date: 6/1/1998

Abstract:
As part of a comprehensive research project on the durability of on and offshore concrete structures in the Persian Gulf, a simulation laboratory has been made use of. The present study consists mainly of nine month exposure tests in the tidal and atmospheric zone conditions in the laboratory. Concrete specimens containing different supplementary materials, namely; silica fume, blast - furnace slag, diatomous earth and trass, have been thoroughly investigated. The tests conducted include, compressive strength, volume changes, half cell potentials, carbonation, and chloride diffusion, all at different ages. With respect to the alternate cycles of wetting and drying the superior preformance of silica fume was followed by the diatomous earth pozzolan. However all concrete mixtures containing natural and artificial pozzolans showed better performance when compared with the plain portland cement control concrete mixtures.