Constitutive study of thermo-elasto-plasticity of deep carbonatic clays

TitleConstitutive study of thermo-elasto-plasticity of deep carbonatic clays
Publication TypeJournal Article
Year of Publication1998
AuthorsT Hueckel, R Pellegrini, and C Del Olmo
JournalInternational Journal for Numerical and Analytical Methods in Geomechanics
Volume22
Start Page549
Issue7
Pagination549 - 574
Date Published01/1998
Abstract

Argillaceous masses considered for potential nuclear waste repositories may exhibit significant space variability in their carbonate content. This may affect mechanical clay properties, such as strength or maximum apparent preconsolidation stress known to strongly depend on carbonate content. This paper investigates experimentally the dependence of thermo-hydro-mechanical behaviour of clays on carbonate content. The properties investigated are thermal strains, thermally induced over-consolidation, strength changes, destructuration, and thermally developed water pressure in undrained conditions. The experimental data are analyzed in terms of a thermo-elasto-plasticity theory for clays, being an extension of Cam-clay model, modified to include the variability of the carbonatic content.

DOI10.1002/(SICI)1096-9853(199807)22:73.0.CO;2-R
Short TitleInternational Journal for Numerical and Analytical Methods in Geomechanics