Strength and conformance testing of a GCL used in a solid waste landfill lining system

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

OSTI ID:543564

Merrill, K S ^[1]; O`Brien, A J ^[2]

---

1. CH2M Hill, Anchorage, AK (United States)
2. CH2M Hill, Sacramento, CA (United States)

This paper describes strength and conformance tests conducted on a Bentomat ST geosynthetic clay liner (GCL) used in a composite lining system for the Cells 4 and 5 expansion of the Anchorage Regional Landfill in Anchorage, Alaska. The Cells 4 and 5 lining system included use of an 80-mil, high-density polyethylene (HDPE) liner overlying a GCL on both the sideslopes and base of the cells. The use of this lining system in a Seismic Zone 4 area on relatively steep side slopes required careful evaluation of both internal shear strength of the GCL and interface friction between the GCL and textured HDPE. Laboratory tests were carried out to evaluate both peak and residual GCL internal strengths at normal loads up to 552 kiloPascals (80 pounds per square inch). Laboratory tests also were conducted to evaluate the interface strength between the GCL and Serrot box and point textured HDPE. Interface strengths between both woven and nonwoven sides of the GCL and the textured HDPE were evaluated. Considerations related to use of peak or residual strengths for various interim stability cases are described in this paper. Stability analyses using stress-dependent interface and internal strengths for the GCL are addressed. The quality assurance and conformance testing program adopted for the project on GCL is discussed also.

• OSTI ID: 543564
• Report Number(s): CONF-9601137--; ISBN 0-8031-2471-6
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
54 ENVIRONMENTAL SCIENCES
ALASKA
INTERFACES
LINERS
MECHANICAL PROPERTIES
MUNICIPAL WASTES
POLYETHYLENES
SANITARY LANDFILLS
SHEAR PROPERTIES
SOLID WASTES
STRESS ANALYSIS