Hydraulic Conductivity of Desiccated Geosynthetic Clay Liners
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Volume 122, Issue 3
Abstract
Large-scale tests were performed to determine the effect of a cycle of wetting and drying on the hydraulic conductivity of several geosynthetic clay liners (GCLs). The GCLs were covered with 0.6 m of pea gravel and permeated with water. After steady seepage had developed, the water was drained away, and the GCL was desiccated by circulating heated air through the overlying gravel. The drying caused severe cracking in the bentonite component of the GCLs. The GCLs were again permeated with water. As the cracked bentonite hydrated and swelled, the hydraulic conductivity slowly decreased from an initially high value. The long-term, steady value of hydraulic conductivity after the wetting and drying cycle was found to be essentially the same as the value for the undesiccated GCL. It is concluded that GCLs possess the ability to self-heal after a cycle of wetting and drying, which is important for applications in which there may be alternate wetting and drying of a hydraulic barrier (e.g. within a landfill final cover).
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References
1.
Boardman, B. T. (1993). “The potential use of geosynthetic clay liners as final covers in arid regions,” MS thesis, Univ. of Texas at Austin, Tex.
2.
Corser, P., and Cranston, M. (1991). “Observations on the long-term performance of composite clay liners and covers.”Proc. Geosynthetic Des. and Perf., Vancouver Geotech. Soc., Vancouver, B.C., Canada.
3.
Daniel, D. E. (1993). “Clay liners.”Geotechnical practice for waste disposal, D. E. Daniel, ed., Chapman and Hall, London, U.K., 137–163.
4.
Estornell, P. M., and Daniel, D. E.(1992). “Hydraulic conductivity of three geosynthetic clay liners.”J. Geotech. Engrg., 118(10), 1592–1606.
5.
Koerner, R. M., and Daniel, D. E.(1992). “Better cover-ups,”Civ. Engrg., ASCE, 62(5), 55–57.
6.
Koerner, R. M. (1994). Designing with geosynthetics, 3rd Ed., Prentice-Hall, Englewood Cliffs, N.J.
7.
LaGatta, M. D. (1992). “Hydraulic conductivity tests on geosynthetic clay liners subjected to differential settlement,” MS thesis, Univ. of Texas as Austin, Tex.
8.
Shan, H. Y., and Daniel, D. E.(1991). “Results of laboratory tests on a geotextile/bentonite liner material.”Geosynthetics 91, Industrial Fabrics Assoc. Int., St. Paul, Minn., 2, 517–535.
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Published In
Journal of Geotechnical Engineering
Volume 122 • Issue 3 • March 1996
Pages: 204 - 208
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: Mar 1, 1996
Published in print: Mar 1996
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