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A Study on Unsaturated Permeable Properties of the Soil-Bentonite Mixtures  

Kim Man-il (Groundwater & Geotechnics Research Center, Korea Institute of Water & Environment, KOWACO)
Publication Information
The Journal of Engineering Geology / v.15, no.2, 2005 , pp. 123-132 More about this Journal
Abstract
This study presents the results of a laboratory investigation performed to study physical properties of soil-bentonite mixtures through the vertical permeation test and dielectric measurement test using Frequency Domain Reflectometry system for the liner of waste landfill. For the laboratory experiments, geotechnical testing was conducted on pre-mixed soil-bentonite which is consisted of standard sand, weathered granite soil and bentonite for estimating physical parameters such as a volumetric water content, void ratio and dielectric constant. In experiment results, initial soil-bentonite mixing rate has an effect of change of volumetric water content. Also change of volumetric water content of a soil-bentonite mixture is clearly detected to measure a response of dielectric constant. In order to estimate an unsaturated permeable property of soil-bentonite mixtures, equations between volumetric water content and dielectric constant were derived from this study.
Keywords
liner; Soil-bentonite mixture; Volumetric water content; Void ratio;
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