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ISSN : 1738-1894(Print)
ISSN : 2288-5471(Online)
ISSN : 2288-5471(Online)
물의 염도가 압축벤토나이트의 수리전도도에 미치는 영향
Influence of Water Salinity on the Hydraulic Conductivity of Compacted Bentonite
Abstract
The influence of water salinity on the hydraulic conductivities of compacted bentonites with several dry densities were studied. The hydraulic conductivity increases 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 bentonite with the density of 1.0 Mg/m3 and 1.2 Mg/m3, the hydraulic conductivity of the 0.4 M NaCl solution increases up to about 7 times and 3 times, respectively higher than that of freshwater. However, for the bentonite with a dry density higher than 1.4 Mg/m3, the salinity has an insignificant effect on the hydraulic conductivity, and the hydraulic conductivity is nearly constant within the salinity range of 0.04 to 0.4 M NaCl. The pre-saturation of the bentonite specimen with freshwater has no significant influence on the hydraulic conductivity.
hydraulic conductivity, bentonite, salinity effects, diffuse double layer, electric potential, 수리전도도, 벤토나이트, 염도 영향, 확산이중층, 전기포텐셜
Reference
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