PERMEABILITY OF COMPACTED CLAY LINERS IN LABORATORY SCALE MODELS.

George P. Korfiatis, Nidal Rabah, Djamel Lekmine

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

Experiments conducted in flexible wall permeameters have shown that the permeability of a soil sample is dependent on the size of the specimen tested. The permeability was found to decrease substantially with decreasing specimen height. Heterogeneity scale effects stemming from large pressure differences across the sample, entrance and exit flow boundary conditions and density variations are believed to be responsible for the observed behavior. Experiments conducted in a laboratory scale model of a liner have shown that significant areal variability of the hydraulic conductivity can result even under strictly controlled laboratory conditions. In addition, the hydraulic conductivity was found to substantially decrease with increasing overburden stresses. The results of this study have shown that the relative heterogeneity length scales must be investigated and quantified in order to assess the usefullness of laboratory and field test data in predicting the hydraulic behavior of liners.

Original languageEnglish
Title of host publicationGeotechnical Special Publication
Pages611-624
Number of pages14
Edition13
StatePublished - 1987

Publication series

NameGeotechnical Special Publication
Number13

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