Short‐Term and Long‐Term Permeabilities of Contaminated Clays
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Volume 119, Issue 4
Abstract
The change in hydraulic conductivity of saturated clays due to short‐term and long‐term exposure of organic chemicals to clays is investigated to explain the change in hydraulic conductivity of contaminated soils. The long‐term exposure of soils to chemicals is simulated in a laboratory environment by premixing chemicals with soils. Under short‐term and simulated long‐term exposures of water soluble chemicals to soils, the hydraulic conductivities of laboratory consolidated clays are measured and reported. The permeability tests are performed using the both flexi‐wall and modified fixed‐wall permeameters with soil samples subjected to confining pressures. The fixed‐wall and flexi‐wall permeameters produced similar results. The short‐term permeability tests showed a change in hydraulic conductivity values but not the intrinsic permeabilities of soils. The simulated long‐term exposure of organic chemicals to soils showed a change in the soil structure and an increase in the intrinsic permeability of soils. The increasing trend in the intrinsic permeability of a given soil was weakly correlated to the decreasing dielectric constant of the pore fluid.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 119 • Issue 4 • July 1993
Pages: 725 - 743
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Jan 29, 1991
Published online: Jul 1, 1993
Published in print: Jul 1993
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