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Porosity Evolution of Free and Confined Bentonites during Interlayer Hydration

Published online by Cambridge University Press:  01 January 2024

William J. Likos  and
Alexandra Wayllace
William J. Likos*
Affiliation:
University of Missouri-Columbia, Department of Civil and Environmental Engineering, Columbia, MO 65211, USA
Alexandra Wayllace
Affiliation:
Colorado School of Mines, Engineering Division, Golden, CO 80401, USA
*
* E-mail address of corresponding author: [email protected]
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Abstract

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Methods for predicting the volume change and swelling-pressure behavior of expansive clays require detailed understanding of coupled interactions between clay microstructure and macrostructure under hydraulic, thermal, and mechanical loads. In this study a suite of water-vapor sorption experiments was conducted using compacted bentonites hydrated in controlled relative humidity (RH) environments maintained under free and constrained volume-change boundary conditions. Emphasis was placed on examining the influences of compaction and predominant exchange cation on the water uptake, volume change, and swelling pressure response. Densely compacted specimens exhibited greater volume changes under free swelling conditions and greater swelling pressures under fully confined conditions. Water uptake, volume change, and swelling pressure were all more significant for Colorado (Ca2+/Mg2+) bentonite than forWyoming (Na+) bentonite. Plastic yielding, evident as a peak in the relationship between swelling pressure and RH, was more evident and occurred at lower RH for the Colorado bentonite. This observation was interpreted to reflect the limited capacity for interlayer swelling in Ca2+/Mg2+ bentonites and corresponding structural collapse induced by the onset of water uptake in larger intra-aggregate and inter-aggregate pores. A semi-quantitative model for the evolution of clay microstructure resulting from interlayer hydration was considered to attribute the experimental observations to differences in the efficiency with which transitions in basal spacing translate to bulk volume changes and swelling pressure. Results provide additional insight and experimental evidence to more effectively model the mechanical behavior of compacted bentonites used as buffer or barrier materials in waste repository applications.

Keywords

BentoniteDehydrationHydrationInterlayer SwellingSmectiteSorption
Type
Article
Information
Clays and Clay Minerals , Volume 58 , Issue 3 , June 2010 , pp. 399 - 414
Copyright
Copyright © The Clay Minerals Society 2010

Footnotes

An erratum to this article is available online at https://doi.org/10.1346/CCMN.2010.0580512.

References

Al-Mukhtar, M. Qi, Y. Alcover, J.F. and Bergaya, F., 1999 Oedometric and water-retention behavior of highly compacted unsaturated smectites Canadian Geotechnical Journal 36 675–684.CrossRefGoogle Scholar
Alonso, E.E. Vaunat, J. and Gens, A., 1999 Modeling the mechanical behavior of expansive clays Engineering Geology 54 173–183.CrossRefGoogle Scholar
ASTM, 2000 ASTM D4318-05 Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils USA West Conshohocken, Pennsylvania.Google Scholar
Aylmore, L.A.G. and Quirk, J.P., 1971 Domains and quasicrystalline regions in clay systems Soil Science Society of America Proceedings 35 652–654.Google Scholar
Berend, I. Cases, J. Francois, M. Uriot, J. Michot, L. Maison, A. and Thomas, F., 1995 Mechanism of adsorption and desorption of water vapor by homoionic montmorillonites Clays and Clay Minerals 43 324–336.CrossRefGoogle Scholar
Bernier, F. Volckaert, G. Alonso, E. and Villar, M., 1997 Suction-controlled experiments on Boom clay Engineering Geology 47 325–338.CrossRefGoogle Scholar
Caballero, E. de Jimenez Cisneros, C. Linares, J., Missana, T., 2004 Physicochemical properties of bentonite: effect of the exchangeable cations FEBEX II Project. THG Laboratory Experiments 40–47.Google Scholar
Cases, J.M. Berend, I. Besson, G. Francois, M. Uriot, J.P. Thomas, F. and Poirier, J.E., 1992 Mechanism of adsorption and desorption of water vapor by homoionic montmorillonite. I. The sodium exchanged form Langmuir 8 2730–2739.CrossRefGoogle Scholar
Cases, J.M. Berend, I. Besson, G. Francois, M. Uriot, J.P. Michot, L. and Thomas, F., 1997 Mechanism of adsorption and desorption of water vapor by homoionic montmorillonite. III. The Mg2+, Ca2+, Sr2+, and Ba2+ exchanged forms Clays and Clay Minerals 45 8–22.CrossRefGoogle Scholar
Chipera, S.J. Carey, J.W. and Bish, D.L., 1997 Controlled-humidity XRD analyses: Application to the study of smectite expansion/contraction Advances in X-ray Analysis 36 713–721.Google Scholar
Cui, Y.J. Yahia-Aissa, M. and Delage, P., 2002 A model for the volume change behavior of heavily compacted swelling clays Engineering Geology 64 233–250.CrossRefGoogle Scholar
Delage, P. Howat, M.D. and Cui, Y.J., 1998 The relationship between suction and swelling properties in a heavily compacted unsaturated clay Engineering Geology 50 31–48.CrossRefGoogle Scholar
Del Pennino, U. Mazzega, E. and Valeri, S., 1981 Interlayer water and swelling properties of monoionic montmorillonites Journal of Colloid and Interface Science 84 301.CrossRefGoogle Scholar
Devineau, K. Bihannic, I. Michot, L. Villiéras, F. Masrouri, F. Cuisinier, O. Fragneto, G. and Michau, N., 2006 In situ neutron diffraction analysis of the influence of geometric confinement on crystalline swelling of montmorillonite Applied Clay Science 31 76–84.CrossRefGoogle Scholar
Dohrmann, R. and Kaufhold, S., 2009 Three new, quick CEC methods for determining the amounts of exchangeable calcium cations in calcareous clays Clays and Clay Minerals 57 338–352.CrossRefGoogle Scholar
Eberl, D.D. Drits, V.A. and Środoń, J., 1996 MUDMASTER; a program for calculating crystallite size distributions and strain from the shapes of X-ray diffraction peaks .CrossRefGoogle Scholar
Ferrage, E. Lanson, B. Sakharov, B.A. and Drits, V.A., 2005 Investigation of smectite hydration properties by modeling experimental X-ray diffraction patterns: Part I. Montmorillonite hydration properties American Mineralogist 90 1358–1374.CrossRefGoogle Scholar
Fripiat, J.T. Jelli, A. Poncelet, G. and Andre, J., 1965 Thermodynamic properties and adsorbed water molecules and electrical conduction in montmorillonite and silicates Journal of Physical Chemistry 69 2185–2197.CrossRefGoogle Scholar
Gens, A. and Alonso, E.E., 1992 A framework for the behavior of unsaturated expansive clays Canadian Geotechnical Journal 29 1013–1032.CrossRefGoogle Scholar
Gillery, F.H., 1959 Adsorption-desorption characteristics of synthetic montmorillonoids in humid atmospheres American Mineralogist 44 806.Google Scholar
Hall, P.L. and Astill, D.M., 1989 Adsorption of water by homoionic exchange forms of Wyoming montmorillonite (SWy-1) Clays and Clay Minerals 37 355–363.CrossRefGoogle Scholar
Hashizume, H. Shimomura, S. Yamada, H. Fujita, T. Nakazawa, H. and Akutsu, O., 1996 X-ray diffraction system with controlled relative humidity and temperature Powder Diffraction 11 288–289.CrossRefGoogle Scholar
Huang, W. Bassett, W.A. and Wu, T., 1994 Dehydration and hydration of montmorillonite at elevated temperatures and pressures monitored using synchrotron radiation American Mineralogist 79 683–691.Google Scholar
Katti, D.R. and Shanmugasundaram, V., 2001 Influence of swelling on the microstructure of expansive clays Canadian Geotechnical Journal 38 175–182.Google Scholar
Keren, R. and Shainberg, I., 1975 Water vapor isotherms and heat of immersion of Na/Ca-montmorillonite systems — I: Homoionic clay Clays and Clay Minerals 23 193–200.CrossRefGoogle Scholar
Keren, R. and Shainberg, I., 1979 Water vapor isotherms and heat of immersion of Na/Ca-montmorillonite systems — II: Mixed Systems Clays and Clay Minerals 27 145–151.CrossRefGoogle Scholar
Keren, R. and Shainberg, I., 1980 Water vapor isotherms and heat of immersion of Na/Ca-montmorillonite systems — III: Thermodynamics Clays and Clay Minerals 28 204–210.CrossRefGoogle Scholar
Komine, H. and Ogata, N., 1994 Experimental study on swelling characteristics of compacted bentonite Canadian Geotechnical Journal 31 478–490.CrossRefGoogle Scholar
Laird, D.A. Shang, C. and Thompson, M.L., 1995 Hysteresis in crystalline swelling of smectites Journal of Colloid and Interface Science 171 240–245.CrossRefGoogle Scholar
Lambe, T.W. and Whitman, R.V., 1969 Soil Mechanics New York Wiley.Google Scholar
Likos, W.J., 2004 Measurement of crystalline swelling in expansive clay Geotechnical Testing Journal 27 540–546.Google Scholar
Likos, W.J. and Lu, N., 2006 Pore-scale analysis of bulk volume change from crystalline swelling in Na+- and Ca2+-smectite Clays and Clay Minerals 54 516–529.CrossRefGoogle Scholar
Lloret, A. Villar, M.V. Sanchez, M. Gens, A. Pintado, X. and Alonso, E.E., 2003 Mechanical behavior of heavily compacted bentonite under high suction changes Géotechnique 53 27–40.CrossRefGoogle Scholar
Mooney, R.W. Keenan, A.G. and Wood, L.A., 1952 Adsorption of water vapor by montmorillonite. II. Effect of exchangeable ions and lattice swelling as measured by X-ray diffraction Journal of the American Chemical Society 74 1371–1374.CrossRefGoogle Scholar
Moore, D.M. and Reynolds, R.C., 1997 X-ray Diffraction and the Identification and Analysis of Clay Minerals New York Oxford University Press.Google Scholar
Noe, D.C. Higgins, J.D. and Olsen, H.W., 2007 Steeply dipping heaving bedrock, Colorado: Part 2 — Mineralogical and Engineering Properties Environmental and Engineering Geoscience XIII 309–324.CrossRefGoogle Scholar
Norrish, K., 1954 The swelling of montmorillonite Transactions of the Faraday Society 18 120–134.Google Scholar
Ormerod, E.C. and Newman, A.C.D., 1983 Water sorption on Ca-saturated clays: II. Internal and external surfaces of montmorillonite Clay Minerals 18 289–299.CrossRefGoogle Scholar
Pusch, R., 1982 Mineral-water interactions and their influence on the physical behavior of highly compacted Na bentonite Canadian Geotechnical Journal 19 381–387.CrossRefGoogle Scholar
Pusch, R., 1994 Waste Disposal in Rock Amsterdam Elsevier.Google Scholar
Romero, E. and Simms, P.H., 2008 Microstructure investigation in unsaturated soils: A review with special attention to contribution of mercury intrusion porosimetry and environmental scanning electron microscopy Geotechnical and Geological Engineering 26 705–727.CrossRefGoogle Scholar
Saiyouri, N. Tessier, D. and Hicher, P.Y., 2004 Experimental study of swelling in unsaturated compacted clays Clay Minerals 39 469–479.CrossRefGoogle Scholar
Sanchez, M. Gens, A. Guimames, L.N. and Olivella, S., 2005 A double structure generalized plasticity model for expansive materials International Journal for Numerical and Analytical Methods in Geomechanics 29 751–787.CrossRefGoogle Scholar
Schanz, T. and Tripathy, S., 2009 Swelling pressure of a divalent-rich bentonite: Diffuse double-layer theory revisited Water Resources Research 45 W00C12.CrossRefGoogle Scholar
Tessier, D. and DeBoodt, M.F., 1990 Behavior and microstructure of clay minerals Soil Colloids and their Associations in Aggregates New York Plenum Press 387–415.CrossRefGoogle Scholar
Tuller, M. and Or, D., 2003 Hydraulic functions for swelling soils: pore-scale considerations Journal of Hydrology 272 50–71.CrossRefGoogle Scholar
USDA (2004) Soil Survey Laboratory Methods Manual, Soil Survey Investigations Report No. 42, Burt, R. (editor). United States Department of Agriculture, method 4B1b, Version 4.0, 2004.Google Scholar
Villar, M.V., 1999 Investigation of the behavior of bentonite by means of suction-controlled oedometer tests Engineering Geology 54 67–73.CrossRefGoogle Scholar
Villar, M.V., 2007 Water retention of two natural compacted bentonites Clays and Clay Minerals 55 311–322.CrossRefGoogle Scholar
Yahia-Aissa, M. Delage, P. Cui, Y.J., Adachi, K. Kukue, M., 2001 Suction-water content relationship in swelling clays Clay Science for Engineering Rotterdam Balkema 65–68.Google Scholar
Young, J.F., 1967 Humidity control in the laboratory using salt solutions — A review Journal of Applied Chemistry 17 241–245.CrossRefGoogle Scholar
Zettlemayer, A.C. Young, E.J. and Chessick, J.J., 1955 Studies of the surface chemistry of silicate minerals — III. Heat of immersion of bentonite in water Journal ofPhysical Chemistry 59 962–966.CrossRefGoogle Scholar