Short-term and creep shear characteristics of a needlepunched thermally locked geosynthetic clay liner

Conference · Sat Nov 01 04:00:00 EST 1997

OSTI ID:543565

Siebken, J R ^[1]; Swan, Jr, R H; Yuan, Z ^[2]

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1. National Seal Co., Galesburg, IL (United States). Technical Services
2. GeoSyntec Consultants, Atlanta, GA (United States). Soil-Geosynthetic Interaction Testing Lab.

A series of constant-rate direct shear tests were conducted on a needlepunched thermally locked geosynthetic clay liner (GCL) in accordance with ASTM Test Method for Determining the Coefficient of Soil and Geosynthetic or Geosynthetic and Geosynthetic Friction by the Direct Shear Method (D 5321). The test results demonstrate that the needlepunched thermally locked reinforcing fibers provide substantial short-term shear strength to a GCL. However, there is a growing concern that the long-term shear strength to a GCL. However, there is a growing concern that the long-term shear strength of this type of GCL can be affected due to the potential of creep within the reinforcing fibers under sustained constant loads which occur in the field. An attempt was made to address this concern through an incrementally-loaded creep shear test conducted in a newly developed constant-load (creep) shear testing device. The results of the creep shear test to date show that the GCL has undergone relatively small shear displacements with incremental shear rates decreasing with time within each loading phase.

• OSTI ID: 543565
• Report Number(s): CONF-9601137--; ISBN 0-8031-2471-6
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
54 ENVIRONMENTAL SCIENCES
CREEP
LINERS
MEASURING METHODS
REINFORCED MATERIALS
SANITARY LANDFILLS
SHEAR PROPERTIES