Abstract
AbstractHydraulic conductivity tests were conducted on two commercially available bentonite–polymer composite (BPC) geosynthetic clay liners (GCLs) containing the same dry blend of sodium bentonite...
Highlights
The BP Geosynthetic clay liners (GCLs) permeated with 20 mM CaCl2 and BPS GCL permeated with 20 and 50 mM CaCl2 solutions did not meet all of the termination criteria because of their very low hydraulic conductivity and low pore volumes of flow (PVF)
The GCLs were permeated with DI water or CaCl2 solutions ranging in concentration (20–500 mM CaCl2) to represent dilute to high-concentration permeant solutions encountered in waste containment systems
The lower hydraulic conductivity of Bentonite–polymer composites (BPCs) GCLs is attributed to polymer hydrogel filling and clogging pores between bentonite granules, as identified in this study using scanning electron microscopy (SEM) images
Summary
Geosynthetic clay liners (GCLs) are widely used as hydraulic barriers in waste containment systems because they can have low hydraulic conductivity (
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