Temperature corrected tensile strengths for geomembrane field seams
Tensile testing of geomembrane seams is a fundamental aspect of the Quality Assurance plan on many installation projects. Qualification welds and cut-out coupons are sampled and tested in peel and shear modes on portable tensile testing machines (tensiometers) in a variety of weather conditions. Field testing is often performed at ambient temperatures with little or no conditioning prior to the test. Temperature correction charts are currently not available for the testing methods and geomembrane materials currently in use. Since thermoplastic geomembrane materials show a dramatic change in tensile properties with temperature, field test results can often appear to fall below project requirements. This study investigates temperature/tensile behaviour of commonly used geomembrane materials. Using both laboratory and field tests, a correction factor was found to adjust tensile strengths at break from ambient test temperature to standard test temperature. This correction factor can be used to calculate an immediate temperature corrected tensile strength at break, which can be used to estimate specification compliance of properly conditioned samples.
- OSTI ID:
- 543133
- Report Number(s):
- CONF-970379-; TRN: 97:004162-0010
- Resource Relation:
- Conference: Geosynthetics `97, Long Beach, CA (United States), 11-13 Mar 1997; Other Information: PBD: 1997; Related Information: Is Part Of Geosynthetics `97: Conference proceedings, Volumes 1 and 2; PB: 1174 p.
- Country of Publication:
- United States
- Language:
- English
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