ISSN: 0149-6115
Page Count: 8

Notched Constant Tensile Load (NCTL) Test for High-Density Polyethylene Geomembranes

Hsuan, YG
Assistant professor, director, and professor,Drexel University,PA,

Koerner, RM
Assistant professor, director, and professor,Drexel University,PA,

Lord, AE
Assistant professor, director, and professor,Drexel University,PA,

Abstract

A modification of an old test method, the notched constant tensile load (NCTL) test, is reintroduced to evaluate the stress-cracking performance of high-density polyethylene (HDPE) geomembranes. In this modified test, notched dumbbell-shaped specimens are subjected to a range of constant tensile loads in a 10% Igepal (CO-630) solution at 50°C. The method has been proposed to ASTM and is being considered by a task group within Committee D-35 on Geosynthetics. This paper presents the test procedures, results of a reproducibility study, and four sets of interlaboratory tests.

Keywords:
stress, high-density polyethylene, geomembranes, stress cracking, ductile, brittle, transition time, transition stress

Paper ID: GTJ10285J
DOI: 10.1520/GTJ10285J
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