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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, Seetheram, Suresh Channarayapat and Thomas, Hywel Rhys 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: 04 Jun 2017 01:43
URI: http://orca.cf.ac.uk/id/eprint/2038

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