Inclusion of Some Aspects of Chemical Behavior of Unsaturated Soil in Thermo/Hydro/Chemical/Mechanical Models. II: Application and Transport of Soluble Salts in Compacted Bentonite
Publication: Journal of Engineering Mechanics
Volume 133, Issue 3
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 ( , , , and ) 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.
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References
Allison, J. D., Brown, D. S., and Novo-Gradac, K. J. (1991). MINTEQA2 user’s manual, version 3.0, Environmental Research Laboratory, U.S. EPA, Washington, D.C.
Alonso, E. E., Gens, A., and Josa, A. (1990). “A constitutive model for partially saturated soils.” Geotechnique, 40(3), 405–430.
Bird, G. W. (1979). “Possible buffer materials for use in nuclear waste vault.” Technical Rep. TR-72, Atomic Energy of Canada, Ontario, Canada.
Bradbury, M. H., and Baeyens, B. (2002). “Porewater chemistry in compacted bentonite resaturated MX-80 bentonite: Physico-chemical characterisation and geochemical modelling.” PSI Bericht Nr. 02-10, Paul Scherrer Institu, Villigen PSI, Switzerland.
Cleall, P. J., Seetharam, S. C., and Thomas, H. R. (2007). “Inclusion of some aspects of chemical behavior of unsaturated soil in thermo-hydro-chemical-mechanical models. I: Model development.” J. Eng. Mech., 133(3), 338–347.
Cuevas, J., Villar, M. V., Martín, M., Cobeña, J. C., and Leguey, S. (2002). “Thermo-hydraulic gradients on bentonite: Distribution of soluble salts, microstructure and modification of the hydraulic and mechanical behavior.” Appl. Clay Sci., 22(1–2), 25–38.
Garcia-Gutierrez, M., Cormenzana, J. L., Missana, T., and Mingarro, M. (2004). “Diffusion coefficients and accessible porosity for HTO and 36Cl in compacted FEBEX bentonite.” Appl. Clay Sci., 26, 65–73.
Huertas, F., et al. (2000). “Full-scale engineered barriers experiment for a deep geological repository for high-level radioactive waste in crystalline host rock (FEBEX project).” Euratom.
Martin, M., Cuevas, J., and Leguey, S. (2000). “Diffusion of soluble salts under a temperature gradient after the hydration of compacted bentonite.” Appl. Clay Sci., 17, 55–70.
Mayhew, Y. R., and Rogers, G. F. C. (1976). Thermodynamic and transport properties of fluids, 2nd Ed., Blackwell, Oxford, U.K.
Meunier, A., Velde, B., and Griffault, L. (1998). “Reactivity of bentonites: A review. An application to clay barrier stability for nuclear waste storage.” Clay Miner., 33(2), 187–196.
Millington, R. J., and Quirk, J. M. (1961). “Permeability of porous solids.” Trans. Faraday Soc., 57, 1200–1207.
Muurinen, A., and Lehikoinen, J. (1998). “Evolution of the porewater chemistry in compacted bentonite.” Material Research Society Symp. Proc., 506, 415–422.
Muurinen, A., and Lehikoinen, J. (1995). “Evaluation of phenomena affecting diffusion of cations in compacted bentonite.” Rep. YJT-95-05, Nuclear Waste Commission of Finnish Power Companies.
Robinson, R. A., and Stokes, R. H. (1968). Electrolyte solutions, Butterworths, London.
Seetharam, S. C., Cleall, P. J., and Thomas, H. R. (2006). “Modelling some aspects of ion migration in a compacted bentonitic clay.” Eng. Geol. (Amsterdam), 85, 221–228.
Snellman, M., Uotila, H., and Rantanen, J. (1987). “Laboratory and modelling studies of sodium bentonite groundwater interaction.” Material Research Society Symp. Proc., 84, 781–790.
Thomas, H. R., Cleall, P. J., Chandler, N., Dixon, D., and Mitchell, H. P. (2003). “Water infiltration into a large scale in-situ experiment in an underground research laboratory: Physical measurements and numerical simulation.” Geotechnique, 53(2), 207–224.
Yong, R. N., and Mohamed, A. M. O. (1997). “Hydro-thermal performance of unsaturated bentonite-sand buffer material.” Eng. Geol. (Amsterdam), 47, 351–365.
Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 133 • Issue 3 • March 2007
Pages: 348 - 356
Copyright
© 2007 ASCE.
History
Received: Mar 21, 2005
Accepted: Feb 15, 2006
Published online: Mar 1, 2007
Published in print: Mar 2007
Notes
Note. Associate Editor: Ching S. Chang
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