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Influence of Salinity on The Hydraulic Conductivity of Compacted Bentonite

Published online by Cambridge University Press:  21 March 2011

Won-Jin Cho ,
Jae-Owan Lee  and
Chul-Hyung Kang
Won-Jin Cho
Affiliation:
Korea Atomic Energy Research Institute P.O. Box 105, Yusong, Taejon 305-606, Korea
Jae-Owan Lee
Affiliation:
Korea Atomic Energy Research Institute P.O. Box 105, Yusong, Taejon 305-606, Korea
Chul-Hyung Kang
Affiliation:
Korea Atomic Energy Research Institute P.O. Box 105, Yusong, Taejon 305-606, Korea
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Abstract

The effect of salinity on hydraulic conductivities of compacted bentonites with various dry densities was studied. The hydraulic conductivities increase with increasing salinity only when the dry density of bentonite is relatively low. The degree of increase becomes more remarkable at a lower dry density of bentonite. For bentonites with densities of 1.0 Mg/m3 and 1.2 Mg/m3, the hydraulic conductivities associated with the 0.4 M NaCl solution increase beyond those associated with the fresh water solution by factor of 7 and 3 times, respectively. However, for the bentonite with dry density higher than 1.4 Mg/m3, the salinity has an insignificant effect on the hydraulic conductivities, and the hydraulic conductivity is nearly constant within the salinity range of 0 to 0.4 M NaCl.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 713: Symposium JJ – Scientific Basis for Nuclear Waste Management XXV , 2002 , JJ11.50
Copyright
Copyright © Materials Research Society 2002

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References

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