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Temperature and damage impact on the permeability of Opalinus clay

Abstract : The effects of temperature on the water transport properties of intact and damaged Opalinus clay (OPA) are investigated by using a recently developed hollow cylinder triaxial cell (Monfared et al. 2011b) that allows full saturation and drainage conditions in low permeability clays and shales. The volumetric response of saturated OPA sample during a drained thermal test shows an irreversible contraction after a temperature threshold. The permeability tests which are performed before and after heating test show that the induced irreversible sample contraction by thermal loading reduces the permeability and storage coefficient of OPA sample. In order to study the effect of temperature on the permeability of a damaged sample of OPA clay, the permeability tests are performed on a saturated OPA sample previously damaged by shearing. The test results show no significant effect of shear type damage on the permeability of the sample at 25°C and at 80°C.
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Contributor : Pierre Delage <>
Submitted on : Tuesday, November 18, 2014 - 5:08:18 PM
Last modification on : Monday, January 11, 2021 - 10:22:06 AM

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M. Monfared, Jean Sulem, Pierre Delage, M. Mohajerani. Temperature and damage impact on the permeability of Opalinus clay. Rock Mechanics and Rock Engineering, Springer Verlag, 2013, pp.131-142. ⟨10.1007/s00603-013-0459-7⟩. ⟨hal-01084210⟩



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