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THMC Analysis of Unsaturated Swelling Clay Subjected to Heating and Hydration
Compacted swelling clays are often envisaged as the main component of engineered barriers for radioactive waste disposal. These barriers are subjected to thermal loading due to the heat emitted by the waste and to hydration from water coming from the adjacent rock. As a consequence of these thermo-hydraulic phenomena, mechanical and chemical changes arise that, in turn, may affect all other aspects of behaviour. A correct understanding and prediction of these barriers require, therefore, the performance of fully coupled thermo-hydro-mechanical and chemical (THMC) numerical analyses. In this paper a fully coupled THMC formulation for unsaturated expansive clays is described and used to analyze the THMC behaviour of the bentonite selected as raw material to construct engineered barriers according to the Spanish concept for high level radioactive waste isolation. The aim of this modelling is to check the capabilities and limitations of the formulation to explain and reproduce the observed THMC behaviour of the bentonite.
THMC Analysis of Unsaturated Swelling Clay Subjected to Heating and Hydration
Compacted swelling clays are often envisaged as the main component of engineered barriers for radioactive waste disposal. These barriers are subjected to thermal loading due to the heat emitted by the waste and to hydration from water coming from the adjacent rock. As a consequence of these thermo-hydraulic phenomena, mechanical and chemical changes arise that, in turn, may affect all other aspects of behaviour. A correct understanding and prediction of these barriers require, therefore, the performance of fully coupled thermo-hydro-mechanical and chemical (THMC) numerical analyses. In this paper a fully coupled THMC formulation for unsaturated expansive clays is described and used to analyze the THMC behaviour of the bentonite selected as raw material to construct engineered barriers according to the Spanish concept for high level radioactive waste isolation. The aim of this modelling is to check the capabilities and limitations of the formulation to explain and reproduce the observed THMC behaviour of the bentonite.
THMC Analysis of Unsaturated Swelling Clay Subjected to Heating and Hydration
Guimarães, L. do N. (author) / Sánchez, M. (author) / Fernández, A. M. (author) / Gens, A. (author) / Olivella, S. (author)
Geo-Denver 2007 ; 2007 ; Denver, Colorado, United States
2007-10-14
Conference paper
Electronic Resource
English
THMC Analysis of Unsaturated Swelling Clay Subjected to Heating and Hydration
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