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Title: Geosynthetic clay liners subjected to differential settlement

Abstract

Geosynthetic clay liners (GCLs), which consist of a thin layer of bentonite attached to one or more geosynthetic materials, are receiving increased use as low-permeability barrier layers in waste-containment systems. Tests were performed in tanks to measure the hydraulic conductivity of GCLs that were subjected to differential settlement. In most cases the GCLs maintained a hydraulic conductivity of 1 {times} 10{sup {minus}7} cm/s or less when subjected to tensile strains of 1{minus}> 10%, depending on the material and test conditions. Overlapped GCL panels maintained their hydraulic integrity despite in-plane slippage of up to 25--100 mm. In general, the ability of GCLs to withstand differential settlement appears to be greater than that of compacted clay liners, but less than that of geomembranes. GCLs are a promising barrier material for situations in which differential settlement is expected, for example, in landfill final covers.

Authors:
 [1];  [2];  [3];  [4]
  1. Golder Associates, Mt. Laurel, NJ (United States)
  2. Univ. of California, Berkeley, CA (United States). Dept. of Civil Engineering
  3. GeoSyntec Consultants, Huntington Beach, CA (United States)
  4. Univ. of Illinois, Urbana, IL (United States). Civil Engineering Dept.
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
506015
Resource Type:
Journal Article
Journal Name:
Journal of Geotechnical and Geoenvironmental Engineering
Additional Journal Information:
Journal Volume: 123; Journal Issue: 5; Other Information: PBD: May 1997
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; SANITARY LANDFILLS; LINERS; COVERINGS; CLAYS; SYNTHETIC MATERIALS; BENTONITE; CONTAINMENT SYSTEMS; HYDRAULIC CONDUCTIVITY; MECHANICAL PROPERTIES; GROUND SUBSIDENCE

Citation Formats

LaGatta, M D, Boardman, B T, Cooley, B H, and Daniel, D E. Geosynthetic clay liners subjected to differential settlement. United States: N. p., 1997. Web. doi:10.1061/(ASCE)1090-0241(1997)123:5(402).
LaGatta, M D, Boardman, B T, Cooley, B H, & Daniel, D E. Geosynthetic clay liners subjected to differential settlement. United States. doi:10.1061/(ASCE)1090-0241(1997)123:5(402).
LaGatta, M D, Boardman, B T, Cooley, B H, and Daniel, D E. Thu . "Geosynthetic clay liners subjected to differential settlement". United States. doi:10.1061/(ASCE)1090-0241(1997)123:5(402).
@article{osti_506015,
title = {Geosynthetic clay liners subjected to differential settlement},
author = {LaGatta, M D and Boardman, B T and Cooley, B H and Daniel, D E},
abstractNote = {Geosynthetic clay liners (GCLs), which consist of a thin layer of bentonite attached to one or more geosynthetic materials, are receiving increased use as low-permeability barrier layers in waste-containment systems. Tests were performed in tanks to measure the hydraulic conductivity of GCLs that were subjected to differential settlement. In most cases the GCLs maintained a hydraulic conductivity of 1 {times} 10{sup {minus}7} cm/s or less when subjected to tensile strains of 1{minus}> 10%, depending on the material and test conditions. Overlapped GCL panels maintained their hydraulic integrity despite in-plane slippage of up to 25--100 mm. In general, the ability of GCLs to withstand differential settlement appears to be greater than that of compacted clay liners, but less than that of geomembranes. GCLs are a promising barrier material for situations in which differential settlement is expected, for example, in landfill final covers.},
doi = {10.1061/(ASCE)1090-0241(1997)123:5(402)},
journal = {Journal of Geotechnical and Geoenvironmental Engineering},
number = 5,
volume = 123,
place = {United States},
year = {1997},
month = {5}
}