TY - GEN
T1 - PERMEABILITY OF COMPACTED CLAY LINERS IN LABORATORY SCALE MODELS.
AU - Korfiatis, George P.
AU - Rabah, Nidal
AU - Lekmine, Djamel
PY - 1987
Y1 - 1987
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:0023207267
SN - 0872626040
T3 - Geotechnical Special Publication
SP - 611
EP - 624
BT - Geotechnical Special Publication
ER -