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Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Modelling coupled behaviour of a clay barrier at high temperatures

Sanchez, M. and Gens, A. and Guimarães, L.D.N. and Olivella, S. (2006) Modelling coupled behaviour of a clay barrier at high temperatures. In: GeoProc 2006: Advances on coupled thermo-hydro-mechanical-chemical processes in geosystems and engineering. Science Press, Beijing, pp. 75-80. ISBN 9787030187505

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Abstract

The design of repositories for the isolation of radioactive waste generally contemplates the use of expansive clays as a buffer material. In field conditions the clay barrier will be hydrated under confined conditions and will also undergo processes of heating, up to maximum of 100 ° C ( this is according to the Spanish concept for the isolation of high level radioactive waste). Based on experimental data, models have been developed to explain and reproduce the observed thermo-hydro-mechanical (THM) behaviour of expansive clays. However, unplanned overheating in a large scale test has provided the opportunity to analyze the clay barrier under conditions quite different from the design ones. A THM formulation and constitutive model have been used to describe and reproduce the main aspects of the observed response of the clay barrier. The analysis provides a unique opportunity to test our current understanding of compacted expansive clay behaviour at temperatures not previously reached.