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Effect of pore medium chemistry on hydraulic conductivity of fine grained soils

Sridharan, A and Nagaraj, HB (1998) Effect of pore medium chemistry on hydraulic conductivity of fine grained soils. In: 3rd International Congress on Environmental Geotechnics, Sep 07-11, 1998, Lisbon, Portugal.

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Abstract

Hydraulic conductivity of fine-grained soils has assumed greater importance in waste disposal facilities. It is necessary to understand better the factors controlling hydraulic conductivity of fine-grained soils which are used as liners in waste disposal facilities. Hydraulic Conductivity study with ten soils with two fluids having extreme dielectric constants(epsilon) namely water and CCl4 has shown that intrinsic permeability (K) increases drastically with decrease in epsilon. These changes are attributed to the significant reduction in the thickness of diffuse double layer which in turn mainly dependent on the epsilon of the permeant. Hydraulic Conductivity with water of each pair of soils having nearly same liquid limit but different plasticity properties is found to be vastly different, but found to correlate well with shrinkage index, defined as difference between the liquid and the shrinkage limits. Also the ratio Kccl(4)/K-w is found to significantly increase with the increase in the shrinkage index.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to A A Balkema.
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 15 Mar 2012 08:56
Last Modified: 15 Mar 2012 08:56
URI: http://eprints.iisc.ernet.in/id/eprint/43979

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