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A constitutive study of thermo‐elasto‐plasticity of deep carbonatic clays
Author(s) -
Hueckel Tomasz,
Pellegrini Rita,
Del Olmo Carlos
Publication year - 1998
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/(sici)1096-9853(199807)22:7<549::aid-nag927>3.0.co;2-r
Subject(s) - consolidation (business) , geotechnical engineering , plasticity , carbonate , constitutive equation , critical state soil mechanics , triaxial shear test , overburden pressure , materials science , geology , composite material , engineering , finite element method , metallurgy , structural engineering , accounting , business , shear (geology)
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 analysed 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. © 1998 John Wiley & Sons, Ltd.