Inclusion of some aspects of chemical behaviour of unsaturated soil in thermo/hydro/chemical/mechanical models. II: Application and transport of soluble salts in compacted bentonite

Cleall, Peter John ORCID: https://orcid.org/0000-0002-4005-5319, Seetheram, Suresh Channarayapat and Thomas, Hywel Rhys ORCID: https://orcid.org/0000-0002-3951-0409 2007. Inclusion of some aspects of chemical behaviour of unsaturated soil in thermo/hydro/chemical/mechanical models. II: Application and transport of soluble salts in compacted bentonite. Journal of Engineering Mechanics 133 (3) , pp. 348-356. 10.1061/(ASCE)0733-9399(2007)133:3(348)

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Abstract

This paper presents an application of a coupled thermo/hydro/chemical/mechanical model via simulation of a laboratory experiment in order to investigate the transport behavior of ions in bentonite pore water. Chemical reactions considered include ion exchange reactions involving major cations �Na+, K+, Mg2+, and Ca2+� and precipitation-dissolution of trace minerals �calcite, dolomite, anhydrite, and halite�. The following conclusions are drawn based on the numerical results. The development of both the temperature and moisture fields was captured by simulation, and a good correlation with the experimental water uptake results was observed. For all ions, the model showed a good qualitative and reasonable quantitative agreement with the experimental results.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords:	unsaturated soils; numerical models; soil deformation; nuclear wastes; chemical equilibrium; transport phenomena.
ISSN:	07339399
Last Modified:	17 Oct 2022 09:06
URI:	https://orca.cardiff.ac.uk/id/eprint/2038

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