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The challenge of geomembrane wild edge thickness
August 1st, 2023
Q: Over the past several years, we have seen a reduction in thickness of the weld edge (smooth edge) of textured geomembranes. This is presenting a challenge for installers when trying to achieve passing trial seams in the field prior to production welding. Destructive seam tests are passing, but just barely (10% above GM19a or […]
FGI webinar – Mobilized Interface Strengths on Geosynthetic Lined Slopes – October 18
October 13th, 2022
A webinar on Mobilized Interface Strengths on Geosynthetic Lined Slopes will take place on October 18 at noon CDT; noon October 19 AEST pre-recorded (Australia); October 19 noon CAT pre-recorded (South Africa); and 5 p.m. JST pre-recorded (Japan). The presenter is Timothy D. Stark, Ph.D., P.E. It is free to students and industry professionals, a […]
The GMA Techline
April 1st, 2019
Vegetation causing gases under geomembrane? Q: I have a site where we are installing a high-density polyethylene (HDPE) liner in an existing pond. Because of some residual heavy metals in the top layer of soil, I would like to strip off the top 3–6 inches (7.6–15.2 cm) of soil and vegetation. Alternatively, we could mow and […]