Chemico-Osmotic Coefficients of Geosynthetic Clay Liners under Different Confinement Conditions
Publication: Geo-Congress 2023
ABSTRACT
Chemico-osmotic diffusion tests have been widely used to determine the chemico-osmotic coefficient (ω) of soils and geosynthetic clay liners (GCLs). A modified device for chemico-osmotic testing has been developed, which offers the option to confine the specimen by a load cell to monitor the total stress, besides the commonly adopted approach (confinement by a blocked piston). Being the strain conditions slightly different between the two approaches (i.e., small-strain versus no-strain), comparative chemico-osmotic tests have been performed. A dense prehydrated GCL and a 20 mM KCl as source solution were used. Under the no-strain condition ω was 0.33. Under the small-strain condition ω was 0.31, and the total vertical stress changed from 59 kPa in equilibrium with deionized water to 22 kPa in equilibrium with 20 mM KCl. Therefore, very close osmotic coefficients were obtained, with the advantage of monitoring the vertical stress during the test when using the load cell.
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REFERENCES
ASTM. (2009). D-5887. Standard Test Method for Measurement of Index Flux Through Saturated Geosynthetic Clay Liner Specimens Using a Flexible Wall Permeameter. American Society for Testing and Materials, West Conshohocken, PA, USA.
Bonhoff, G., and Shackelford, C. D. (2013). “Improving membrane performance via bentonite polymer nanocomposite” Applied Clay Science 86, 83–98.
Di Emidio, G. (2010). Hydraulic and chemico-osmotic performance of polymer-treated clays PhD dissertation, Ghent University, Belgium, 249 p.
Dominijanni, A., Manassero, M., and Puma, S. (2013). “Osmotic phenomena in bentonites” Coupled Phenomena in Environmental Geotechnics. Manassero et al. eds., Taylor and Francis Group, London, pp. 169–180.
Dominijanni, A., Guarena, N., and Manassero, M. (2018). “Laboratory assessment of the semipermeable properties of a natural sodium bentonite” Canadian Geotechnical Journal, 55(11): 1611–1631.
Dominijanni, A., Guarena, N., and Manassero, M. (2019). “Strain-controlled oedometer test for the measurement of the chemico-osmotic properties of bentonites” Proc. 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings 17th, ECSMGE 2019, Reykjavik., Iceland 1-6 September 2019.
Guarena, N., Dominijanni, A., and Manassero, M. (2022). “The role of diffusion induced electro-osmosis in the coupling between hydraulic and ionic fluxes through semipermeable clay soil” Soils and foundations, 101177.
Katchalsky, A., and Curran, P. F. (1965). Nonequilibrium Thermodynamics in Biophysics. Harvard University Press, Cambridge, MA, 248 pp.
Kang, J.-B., and Shackelford, C. D. (2009). “Clay membrane testing using a flexible-wall cell under closed-system boundary conditions” Applied Clay Science, 44(1-2), pp. 43–58.
Malusis, M., and Shackelford, C. D. (2001). “Chemico-osmotic efficiency of a geosynthetic clay liner. Journal of Geotechnical and Geoenvironmental Engineering, 128, 97–106.
Malusis, M. A., Shackelford, C. D., and Olsen, H. W. (2001). “A laboratory apparatus to measure the chemico-osmotic efficiency for clay soils”. Geotechnical Testing Journal, 24, 229–242.
Malusis, M. A., Kang, J., and Shackelford, C. D. (2015). “Restricted salt diffusion in a geosynthetic clay liner” Environmental Geotechnics 2:2, 68–77.
Malusis, M. A., and Daniyarov, A. S. (2016). “Membrane efficiency and diffusive tortuosity of a dense prehydrated geosynthetic clay liner.” Geotextiles and Geomembranes, 44, 719–730.
Manassero, M., and Dominijanni, A. (2003). “Modelling the osmosis effect on solute migration through porous media”. Géotechnique, 53,481–492.
Mazzieri, F., Van Impe, P. O., and Di Emidio, G. (2005). “Chemico-osmotic behaviour of modified Multiswellable bentonite”. Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering, Osaka, Japan 12-16 September 2005, Vol. 4, 2297–2300.
Mazzieri, F., Di Emidio, G., and Van Impe, P. O. (2010). “Diffusion of calcium chloride in modified bentonite: impact on osmotic efficiency and hydraulic conductivity”. Clays and Clay minerals, 58(3), 351–363.
Mazzieri, F., and Di Emidio, G. (2015). “Hydraulic conductivity of a dense prehydrated geosynthetic clay liner” Geosynthetics International, 22(1), 138–148.
Mitchell, J. K. (1993). Fundamentals of Soil Behaviour (2nd edition). Wiley, NY, 437 pp.
Neuzil, C. E., and Provost, A. M. (2009). “Recent experimental data may point to a greater role for osmotic pressures in the subsurface”, Water Resour. Res., 45, W03410.
Rahman, S. A. B., Sample-Lord, K. M., and Bohnhoff, G. L. (2022). “Advancing the State-of-the-Art in Bentonite Barrier Research: Measuring Membrane Behavior and Diffusion at Elevated Temperatures” Geotechnical Special Publication, 2022, 2022-March (GSP 335), pp. 100–110.
Scalia, J., IV, Bareither, C. A., and Shackelford, C. D. (2018). “Advancing the Use of Geosynthetic Clay Liners as Barriers” Geotechnical Engineering Journal of the SEAGS & AGSSEA. 49(4) 100–113.
Sample-Lord, K. M., and Shackelford, C. D. (2014). “Membrane Behavior for Unsaturated Bentonite Barriers” Proceedings of the Geo-Congress, held in Atlanta, Georgia, February 23-26 (2014).
Sample-Lord, K. M., and Shackelford, C. D. (2018). “Membrane behavior of unsaturated sodium bentonite” Journal of Geotechnical and Geoenvironmental Engineering, 144(1).
Shackelford, C. (2013). “Membrane behaviour in engineered bentonite-based containment barriers: State of the art”. Coupled Phenomena in Environmental Geotechnics. Manassero et al. eds., Taylor and Francis Group, London, pp. 45–59.
Tang, Q., Katsumi, T., Inui, T., and Li, Z. (2014). “Membrane behavior of bentonite-amended compacted clay, Soils and Foundations, 54(3), 329–344.
Yeo, S.-S., Shackelford, C. D., and Evans, C. J. (2005). “Membrane Behavior of Model Soil–Bentonite Backfills” Journal of Geotechnical and Geoenvironmental Engineering 131(4), 418–42.
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Published online: Mar 23, 2023
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