Long-term shear strength behavior of a needlepunched geosynthetic clay liner
- Colloid Environmental Technologies Co., Arlington Heights, IL (United States)
- GeoSyntec Consultants, Atlanta, GA (United States). Soil-Geosynthetic Interaction Testing Lab.
This paper describes two large-scale constant-load (creep) shear testing devices that were developed to evaluate the long-term shearing behavior of geosynthetic clay liners (GCLs) and interfaces between GCLs and other geosynthetics or soils. One device was designed to simulate loading conditions that typically occur on a GCL deployed in a landfill cover system. The other device was designed to simulate loading conditions that typically occur on a GCL deployed in a landfill lining system. A needlepunched GCL was selected for evaluation of its long-term shearing behavior under these two types of loading conditions and the test results are presented in terms of time-displacement curves and shear rate-displacement curves. The results to date show that the GCL has undergone relatively small shear displacements and that the shear displacement rates within the GCL and/or at the test interface have been continuously decreasing with time. For the conditions used in this testing program, it is believed that the GCL`s behavior can be considered stable. Further testing is planned to more accurately define the time-dependent internal and interface shear behavior of the GCL.
- OSTI ID:
- 543566
- Report Number(s):
- CONF-9601137-; ISBN 0-8031-2471-6; TRN: IM9748%%181
- Resource Relation:
- Conference: Symposium on testing and acceptance criteria for geosynthetic clay liners, Atlanta, GA (United States), 29 Jan 1996; Other Information: PBD: 1997; Related Information: Is Part Of Testing and acceptance criteria for geosynthetic clay liners; Well, L.W. [ed.]; PB: 279 p.; ASTM special technical publication 1308
- Country of Publication:
- United States
- Language:
- English
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