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The Diffusion Coefficient of Ionic Species Through Unsaturated Materials

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Abstract

This paper documents the measurement of the chloride diffusion coefficient through partially saturated porous materials. The method was electrochemical impedance spectroscopy, and it was validated by comparison to migration tests in fully saturated samples. A microstructure-based electrical equivalent circuit was developed to obtain the main features of the sample including the material electrical resistance for any water saturation degree. It is shown that the chloride diffusion coefficient varies over four orders of magnitude when the material is almost dry to fully saturated.

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Authors and Affiliations

  1. LMDC (Laboratoire Matériaux et Durabilité des Constructions), Université de Toulouse, UPS, INSA, 135 Avenue de Rangueil, 31077, Toulouse Cedex 04, France

    Hugo Mercado-Mendoza & Sylvie Lorente

  2. ANDRA, 1/7 Rue Jean Monnet, Parc de la Croix Blanche, 92298, Chatenay-Malabry, France

    Xavier Bourbon

Authors
  1. Hugo Mercado-Mendoza
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  2. Sylvie Lorente
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  3. Xavier Bourbon
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Correspondence to Sylvie Lorente.

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Mercado-Mendoza, H., Lorente, S. & Bourbon, X. The Diffusion Coefficient of Ionic Species Through Unsaturated Materials. Transp Porous Med 96, 469–481 (2013). https://doi.org/10.1007/s11242-012-0100-3

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  • DOI: https://doi.org/10.1007/s11242-012-0100-3

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