Accelerated Testing of Chloride Diffusivity in Cement Based Materials: New Test Operating Mode

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Title: Accelerated Testing of Chloride Diffusivity in Cement Based Materials: New Test Operating Mode

Author(s): A.B. Ammar, J.M. Loche and P. Dumargue

Publication: Special Publication

Volume: 179

Issue:

Appears on pages(s): 587-604

Keywords: absorption; chlorides; conductivity; diffusion; double layer; electrical properties

Date: 6/1/1998

Abstract:
Penetration of aggressive ions, such as chlorides, through concrete is one of the factors which causes to the depassivation of reinforcement and therefore may shorten the service life of a reinforced concrete structure. Most research work focusing on natural or accelerated diffusion tests generally rely on the validity of Fick’s laws. In this paper, we present both a new accelerated diffusion cell and an original test operating mode. The theoretical approach is based upon the study of diffusion-migration mechanism within the pore solution. The experimental results presented here have been obtained with tests on samples of saturated mortar.