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RECORD NUMBER: 379 OF 1357

OLS Field Name OLS Field Data
Main Title Hydraulic Conductivity of Three Geosynthetic Clay Liners.
Author Estornell, P. ; Daniel, D. E. ;
CORP Author Hart-Crower Associates, Seattle, WA. ;Texas Univ. at Austin.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Publisher c1992
Year Published 1992
Report Number R-815546; EPA/600/J-92/392;
Stock Number PB93-131746
Additional Subjects Linings ; Hydraulic conductivity ; Earth fills ; Bentonite ; Waste storage ; Solid waste disposal ; Graphs(Charts) ; Tables(Data) ; Mestings ; Remedial action
Holdings
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Status
NTIS  PB93-131746 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/08/1993
Collation 10p
Abstract
The hydraulic conductivity of three 2.9 sq m (32 sq ft) geosynthetic clay liners (GCLs) was measured. Tests were performed on individual sheets of the GCLs, on overlapped pieces of GCLs, and on composite liners consisting of a punctured geomembrane overlying a GCL. Hydraulic conductives of two of the GCLs were in the range of 10 to the minus 10 10 to the minus 8 cm/s. No flow was measured through the third GCL, but the conductivity was obviously very low. The hydraulic conductivities of overlapped GCLs were about the same as those of the control samples with no overlap; an effective hydraulic seal developed along the overlaps in all the materials tested. Performance of the punctured geomembrane-GCL composites varied--performance was best when the punctured geomembrane was placed directly against bentonite and no geotextile separated the punctured geomembrane from the bentonite. For those GCLs with geotextiles on both sides, problems with migration of bentonite into the underlying drainage layer were encountered when inadequate filtration was provided. However, with a suitable filtration layer separating the drainage layer from the GCL, problems with migration of bentonite were liminated.