Modelling contamination of clays

TitleModelling contamination of clays
Publication TypeJournal Article
Year of Publication2004
AuthorsN Boukpeti, R Charlier, and T Hueckel
JournalElsevier Geo-Engineering Book Series
Volume2
IssueC
Start Page523
Pagination523 - 528
Date Published01/2004
Abstract

A constitutive model for the behaviour of clays in contact with organic liquids is presented. The model was originally proposed by Hueckel (1997), based on experimental data reported by Fernandez and Quigley (1985,1991). It is recognized that the physico-chemical phenomena taking place at the scale of the clay particles are responsible for changes in permeability and deformation in the clay. Two types of chemical strains are identified: an elastic expansive strain at stress level lower than the plastic yield limit, and a plastic compaction strain at higher stress level. The plastic yield limit is assumed to decrease as the contaminant mass concentration increases. This is referred to as chemical softening. The chemo-plastic behaviour of a cylindrical clay layer subjected to vertical flow of contaminant is simulated. © 2004 Elsevier Ltd. All rights reserved.

DOI10.1016/S1571-9960(04)80093-4
Short TitleElsevier Geo-Engineering Book Series