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Journal of Porous Media
Fator do impacto: 1.752 FI de cinco anos: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN Imprimir: 1091-028X
ISSN On-line: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v13.i8.50
pages 743-748

MODELING THE EFFECT OF OSMOTIC POTENTIAL CHANGES ON DEFORMATION BEHAVIOR OF SWELLING CLAYS

Nadia Laredj
LCTPE Laboratory, Faculty of Science and Technology, University Abdelhamid Ibn Badis, Mostaganem, Algeria
Hanifi Missoum
LCTPE Laboratory, Faculty of Science and Technology, University Abdelhamid Ibn Badis, Mostaganem, Algeria
Karim Bendani
Department of Civil Engineering and Architecture, University Abdelhamid Ibn Badis of Mostaganem, Algeria; Laboratory of Construction, Transports, and Environment Protection, University Abdelhamid Ibn Badis of Mostaganem, Algeria

RESUMO

Different models for the description of swelling pressure in clays have been proposed in recent years. Some models are based on geotechnical properties; these models are empirical, obtained from a statistical approach, whereas others originated from concepts of thermodynamics, and another class of models resulted from the diffusive double layer theory of Gouy and Chapman. The swelling characteristics are strongly influenced by the pore fluid chemistry and the mineralogical composition of clays. The composition of interlayer cations controls the interlayer water content, and hence the saturated water content and the swelling pressure. This study presents the effect of osmotic potential due to chemical solute concentration changes via the use of the net stress, suction, and chemical solute concentration based on elastic constitutive relationship. This model will represent the deformation behavior exhibited by expansive clays. In particular, it was suggested that the determination of the stiffness of the soil with respect to chemical solute concentration could be achieved via an empirical relationship. An exercise is performed to show the ability of the model to represent the trend of the observed behavior.


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