Size and Double-Layer Effects on the Macroscopic Behavior of Clays
The modeling of clays has been developed in two directions: macroscopic constitutive modeling and microscopic phenomenological studies. Starting with the linear poroelastic models of Biot and Terzaghi, several constitutive models have been developed at the macroscopic level. Creep and stress relaxation and rate effects, have been studied using viscoelastic or elasto-viscoplastic constitutive models (see Liang and Ma , Perzyna , Cristescu ) and yield, irreversible deformation and hysteretic soil behavior has been modeled using plasticity models (Roscoe and Burlan ). At the microscopic level recent experimental work (Low , Newman , Velde ) has contributed to the understanding of the behavior of clays. The influence of the salt concentration in the water phase, the double-layer forces and the structural changes in the water under the influence of the particle surface has also been studied, to explain for the nonlinear behavior of clays.
KeywordsPorous Medium Double Layer Slip Condition Macroscopic Behavior Electrokinetic Phenomenon
Unable to display preview. Download preview PDF.
- 1.Bauer, J., Auriault, J.L., Strzelecki, T. and He, S. (1990) Porous deformable media saturated by a very compressible fluid: quasistatics. Eur. J. Mech. A: Solids, Vol. no. 4, pp. 373–392.Google Scholar
- 4.Cristescu, N. (1967) Dynamic Plasticity, North-Holland, Amsterdam.Google Scholar
- 5.Ene, H.I. and Vernescu, B. (1995) On the microscopic behavior of clays. In A.P.Bourgeat, C. Carrasso, S. Luckhaus, A. Mikelic, editors, Mathematical Modelling of Flow Through Porous Media,pp. 138–147, World Scientific.Google Scholar
- 6.Ene, H.I. and Vernescu, B. (1995) Viscosity dependent behaviour of viscoelastic porous media. In R.P. Gilbert and K. Hackl, editors, Asymptotic Theories for Plates and Shells, pages 35–54. Pitman Research Notes in Mathematics 319.Google Scholar
- 13.Melcher, J.R. (1981) Continuum Electromechanics, The MIT Press, Cambridge, Massachusetts.Google Scholar
- 14.Newman, A.C.D. (1987) Chemistry of Clays and Clay Minerals, John Wiley, New York.Google Scholar
- Perzyna, P. (1963) The constitutive equations for rate sensitive plastic materials, Quarterly of Appl. Math.,Vol. no. 20, pp. 321–332.Google Scholar
- 16.Roscoe, K.H. and Burlap, J.B. (1968) On the generalized stress-strain behavior of wet clays.Google Scholar
- 18.Velde, B. (1985) Clay Minerals, Elsevier, Amsterdam.Google Scholar
- 19.Vernescu, B. (1989) Viscoelastic Behaviour of a Deformable Porous Medium, Stud. Cerc. Mat.,Vol. no. 41, pp. 423–440.Google Scholar