ISSN: 1945-7545
Page Count: 8

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

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

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

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