Mechanisms Controlling Hydraulic Conductivity and Service Life of Bentonite-Polymer Composite Geosynthetic Clay Liners Permeated with Aggressive Solutions

Sarah Gustitus-Graham
Bentonite-polymer composite geosynthetic clay liners (BPC-GCLs) are used to line containment systems such as landfills, leach pads, and impoundments with aggressive leachates that adversely affect conventional sodium bentonite GCLs. BPC-GCLs were permeated with aggressive leachates to understand the mechanisms controlling hydraulic conductivity in BPC-GCLs under various conditions. Empirical results were compared to computational models to develop methods for predicting hydraulic conductivity and service life. Polymer elution in BPC-GCLs resulted in preferential flow paths and dramatic...
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