期刊
INTERNATIONAL JOURNAL OF MULTIPHYSICS
卷 2, 期 1, 页码 129-145出版社
MULTI-SCIENCE PUBL CO LTD
DOI: 10.1260/175095408784300234
关键词
Cement-based materials; Chloride; Electrodiffusion; Periodic homogenization; Diffusion coefficient
In this paper, we propose a macroscopic migration model for cementitious porous media obtained from periodic homogenization technique. The dimensional analysis of Nernst-Planck equation leads to dimensionless numbers characterizing the problem. According to the order of magnitude of the dimensionless numbers, the homogenization of Nernst-Planck equation leads at the leading order to a macroscopic model where several rates can be coupled or not. For a large applied electrical field accelerating the transfer of ionic species, we obtain a macroscopic model only involving migration. A simple experimental procedure of measurement of the homogenized chlorides diffusivity is then proposed for cement-based materials.
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