Hydraulic conductivity of partially prehydrated geosynthetic clay liners permeated with aqueous calcium chloride solutions

S. M. Vasko, H. Y. Jo, C. H. Benson, T. B. Edil, T. Katsumi

Research output: Contribution to conferencePaper

52 Citations (Scopus)

Abstract

Tests were conducted to determine how prehydration water content affects the hydraulic conductivity of geosynthetic clay liners (GCLs) permeated with calcium chloride (CaCl2) solutions of various concentratins. Results of the tests show that prehydration may not prevent the hydraulic conductivity of GCLs from increasing when permeated with divalent solutions. Hydraulic conductivities generally increased with CaCl2 concentration, regardless of the prehydration water content, with hydraulic conductivities as much as 85,000 times higher than that obtained with deionized water. Application of a light confining stress during prehydration did not consistently result in lower hydraulic conductivities. Hydraulic conductivities much higher than anticipated were obtained when prehydration did not occur uniformly, indicating that prehydration must be carefully implemented in the field if it is to be reliable. Hydraulic conductivity was inversely correlated with void ratio, which is consistent with differences in the swelling of the bentonite granules for fully and partially prehydrated GCLs.

Original languageEnglish
Pages685-699
Number of pages15
Publication statusPublished - 2001
EventGeosynthetics Conference 2001 - Oregon, United States
Duration: 2001 Feb 122001 Feb 14

Other

OtherGeosynthetics Conference 2001
CountryUnited States
CityOregon
Period01/2/1201/2/14

ASJC Scopus subject areas

  • Materials Science(all)
  • Environmental Science(all)
  • Earth and Planetary Sciences(all)
  • Engineering(all)

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    Vasko, S. M., Jo, H. Y., Benson, C. H., Edil, T. B., & Katsumi, T. (2001). Hydraulic conductivity of partially prehydrated geosynthetic clay liners permeated with aqueous calcium chloride solutions. 685-699. Paper presented at Geosynthetics Conference 2001, Oregon, United States.