Estimation de la porosité dans un matériau argileuxPorosity assessments in a clay material |
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Authors: | Xavier Guillot Muzahim Al-Mukhtar Faiza Bergaya Jean-Marie Fleureau |
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Institution: | 1. Centre de recherche sur la matière divisée, CNRS–université d''Orléans, 1bis, rue de la Férollerie, 45071 Orléans cedex 2, France;2. LMSS-Mat, École centrale de Paris, Grande-Voie-des-Vignes, 92295 Châtenay-Malabry cedex, France |
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Abstract: | Porosity measurements on a clay material, carried out through various microscopic techniques, show a significant difference with the total porosity macroscopically estimated. Analyses have allowed to assign this difference, whose importance is linked to the hydromechanical stresses sustained by the material, to microporous spaces lower than 2 nm and to closed pore volumes, not accessible by the used techniques. Besides, the role of the drying methods of samples, which do not allow the removal of a part of the water, is highlighted. Its elimination would lead to irreversible microtextural modifications, prejudicial to the understanding of the macroscopic behaviour of the material. To cite this article: X. Guillot et al., C. R. Geoscience 334 (2002) 105–109. |
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Keywords: | porosity clay material micro-macro hydromechanical experiments porosité matériau argileux micro–macro essais hydromécaniques Géomatériaux Pétrologie Geomaterials Petrology |
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