Air-channel testing of thermally bonded f exible polypropylene geomembrane seams

Timothy D Stark, Richard W. Thomas, Thomas J. Dehlin

Research output: Contribution to specialist publicationArticle


The article describes the ongoing research project that is investigating the development of a relationship between geomembranes sheet temperature and air-channel pressure required to ensure a required seam strength for fPP geomembranes. The seam peel and burst tests were performed independently of each other. The seam specimens were lin.-wide strips and were allowed to equilibrate to the test temperature before testing commenced. Each specimen was tested at a cross-head rate of travel of 20in./minute. If no leaks were present, the air pressure was increased at 5-psi intervals with a brief pause between each interval to ensure no leakage was occurring until the seam burst. A relationship between the peel stress and the hoop stress may be a better alternative, but calculating the hoop stress requires measuring the width of the air channel in every seam tested, which is probably impractical for a field test.

Original languageEnglish (US)
Number of pages6
Specialist publicationGeosynthetics
StatePublished - Apr 2013

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Polymers and Plastics


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