SHEAR STRENGTH OF REINFORCED GEOSYNTHETIC CLAY LINER

Investigators conducted direct shear tests to assess the internal strength of a reinforced geosynthetic clay liner (GCL) at normal stresses ranging from 2.45 to 69.0 kPa. The polypropylene reinforcement increased the peak internal strength contrary to the literature for unreinforced GCLs; however, the reinforced GCL displayed a postpeak reduction in strength with displacement due to failure of the reinforcement. Direct shear tests were also performed to evaluate the interface strength between the reinforced GCL and other geosynthetic materials. Researchers noted the extrusion of bentonite from the GCL into the interfaces, which may reduce the interface strengths. Peak interface strengths between the GCL and a smooth geomembrane or a drainage geocomposite were less than the internal strength at all normal stresses tested. However, the peak interface strength between the GCL and a textured geomembrane was limited by the peak internal strength for normal stresses exceeding 13.8 kPa. Postpeak reductions in strength with displacement resulted at this interface at higher normal stresses because of reinforcement failure.

Language

  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: p. 259-266
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00720418
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 16 1996 12:00AM