Water Retention in Expansive Clay under Elevated Temperatures and Constrained Conditions
Publication: Geo-Congress 2022
ABSTRACT
This paper focuses on the impact of elevated temperatures on the water retention of MX80 bentonite under constrained or constant volume conditions. This topic is necessary to simulate the combined heating and hydration of bentonite in engineered barrier systems for deep geological repositories for nuclear waste, where the restraint from the surrounding host rock prevents swelling. In addition to summarizing the coupled thermo-hydraulic properties of MX80 bentonite, a water retention curve considering capillary and adsorption effects was extended to elevated temperatures and compared with data from the literature for compacted bentonite, with insights into the effects of different mechanisms of water retention over the full suction range.
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Geo-Congress 2022
Pages: 315 - 324
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© 2020 ASCE.
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Published online: Mar 17, 2022
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