This paper deals with the swelling due to water of an initially partially saturated sample of bentonite. Homogenization tools are used in order to determine the macroscopic state equation. Bentonite is modelled as the combination of a solid matrix, which is composed of particles made of parallel platelets, and of a porous network. The first part of this paper exposes briefly the mechanical framework of microporoelasticity. In the second part, solid phase of bentonite is modelled with a linear elastic behaviour and capillary effects in the porous network are considered. At the end of this part, comparison with experimental results convinces us to develop a finer model of the solid phase in order to take into account the osmotic effects which exist “inside” the solid phase, in between the particle platelets. This finer model is the aim of the third part at the end of which a state equation for ben-tonite is proposed. Comparison between this equation and the experimental data is very satisfying and brings a qualitative explanation for the different contributions to swelling pressure: swelling of bentonite is the result of mechanical, capillary and electrostatical contributions.
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References
Skempton, A.W. (1960). Effective stress in soils, concrete and rock. In Proceedings of Conference on Pore Pressure and Suction in Soils, pages 4–16. Butterworth
Terzaghi, K. (1936). The shearing resistance of saturated soils and the angle between the planes of shear. In First International Confernce on Soil Mechanics and Foundation Engineering, pages 54–56, Harvard University
Bishop, A.W. (1959). The principle of effective stress. Teknisk Ukeblad, 39:859–863
Alonso, E., Gens, A., and Josa, A. (1990). A constitutive model for partially saturated soils. Geotechnique, 40:405–430
Modaressi, A. and Abou-Bekr, N. (1994). Constitutive model for unsaturated soils; validation on a silty material. In Proceedings of Numerical Methods in Geomechanics, volume NUMOG V 1. Balkema
Coussy, O. and Fleureau, J.M. (2002). M écanique des sols non saturé s. Edition Hermès Sciences
Chateau, X. and Dormieux, L. (2000). The behaviour of unsaturated porous media in the light of a micromechanical approach. In Rahardjo, T. and Leon, editors, Unsaturated Soils for Asia. Rotterdam, Balkerna
Dormieux, L., Kondo, D., and Ulm, F.-J. (2006a). Microporomechanics. Wiley, New York
Zaoui, A. (2002). Continuum micromechanics: Survey. ASCE Journal of Engineering Mechanics, 128(8):808–816
Dormieux, L., Lemarchand, E., and Sanahuja, J. (2006b). Comportement macroscopique des matriaux poreux microstructure en feuillets. C.R. Mecanique, 334:304–310
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Cariou, S., Dormieux, L., Skoczylas, F. (2009). Swelling of a Bentonite Plug: A Micromechanical Approach. In: Eberhardsteiner, J., Hellmich, C., Mang, H.A., Périaux, J. (eds) ECCOMAS Multidisciplinary Jubilee Symposium. Computational Methods in Applied Sciences, vol 14. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-9231-2_5
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