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The Effect of pH on Electro-osmotic Flow in Argillaceous Rocks |
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| Authors: | Mohamed Younes Ahmed Said Taibi Hanène Souli Jean-Marie Fleureau |
| Institution: | 1. Laboratoire Ondes et Milieux Complexes LOMC, CNRS UMR 6294, Université du Havre, 76058, Le Havre, France 2. Laboratoire de Tribologie et Dynamique des Systèmes LTDS, CNRS UMR5513, ENISE, Université de Lyon, 42023, Saint-étienne, France 3. Laboratoire de Mécanique des Sols-Structures & Matériaux MSS-MAT, CNRS UMR 8579, Ecole Centrale Paris, 92295, Chatenay-Malabry, France |
| Abstract: | The use of electro-osmosis in geotechnical engineering has been considered since 1930. Its application has been tested in several sectors like the fight against rising damp in porous materials, the consolidation of soils as well as the remediation of the soils contaminated by oil and heavy metals, etc. The paper presents an experimental study of the electrokinetic phenomena resulting from the application of an electric field to argillaceous sandstones. The electroosmotic tests required the development of a completely new experimental device composed of a confining cell, of a system of measurement and control of the pH of the electrolyte near the electrodes, of a system of control and measurement of the voltage and current at the edges of the sample, and of a system of measurement of inlet (anodic) and outlet (cathodic) flows. Various boundary conditions are considered with and without control of pH. In addition, a micro structural modelling of the electrokinetic phenomena makes it possible to quantify the electro osmotic conductivity with a good agreement with experiments. |
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