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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 […]
Need for substitute surfactant for ASTM D5397
August 1st, 2023
It has been brought to our attention by the ASTM task group regarding ASTM D5397, Standard Test Method for Evaluation of Stress Crack Resistance of Polyolefin Geomembranes Using Notched Constant Tensile Load Test, that the surfactant used in this experiment (Igepal CO-630) is a regulated substance in some countries (i.e., EU Registration, Evaluation, Authorisation and […]
IGS North America update: Education in the spotlight
August 1st, 2023
IGS North America (IGS-NA) has an educational mission, focused on both today’s contributors to the civil engineering field and tomorrow’s (students). With regard to students, the 2023-2024 IGS-NA board has numerous irons in the fire: We issued four fellowships (currently $500 each) in February as part of our joint initiative with the Geosynthetic Institute (GSI) […]
Updated accelerated aging test for geomembranes
June 1st, 2023
FIGURE 1 Star fold coupon The accelerated aging process is based on the relationship between temperature and chemical reaction rate, in which the reaction rate increases as temperature rises. Most accelerated aging tests use higher temperatures to accelerate the aging process by representing real-time aging artificially. A good accelerated aging test should simulate real-time aging […]
Connection strength of geosynthetics anchored in concrete
February 1st, 2023
FIGURE 1 Photographs of various styles of embedment liners Nearly all geomembrane installations are fixed at the perimeter of the containment by burying the liner in an anchor trench or by attaching it to concrete (i.e., a collar wall, foundation, ring wall, manhole, vault, etc.). The standard approach for connecting the geomembrane liner to concrete […]
GSI Webinar – Quality Control/Quality Assurance of Waste Containment Systems – November 9
October 27th, 2022
The Geosynthetic Institute (GSI) will sponsor a webinar, “Quality Control/Quality Assurance (QA/QC) of Waste Containment Systems” on November 9 from 11:30 a.m. to 1 p.m. EDT. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. This presentation focuses on geosynthetics used in containment systems. It illustrates the importance of good […]
GSI Fellowship Award recipients announced
October 17th, 2022
The 2022-2023 Geosynthetic Institute (GSI) Fellowship proposals have been reviewed by Dr. George Koerner, Dr. Grace Hsuan and the GSI Board of Advisors (BOA). GSI is pleased to announce that 10 recipients of this year’s $5,000 awards have been chosen. As in previous years, the candidate must be either pursuing a master’s or doctoral degree […]
GSI’s annual Landreth “Steward of the Environment” award
October 1st, 2022
The Robert and Mitchell Landreth “Steward of the Environment” award was established in 2021. It is in honor of Robert Landreth (1939–2021) and his wife, Mitchell. The annual award is bestowed by the Geosynthetic Institute (GSI) in recognition of “distinguished engineering achievement related to the environment” by a college faculty member, graduate student or post […]
GSI Webinar – Stability Design of Landfill Cover Soils – October 12
September 29th, 2022
The Geosynthetic Institute (GSI) will sponsor a webinar, “Stability Design of Landfill Cover Soils,” on October 12, from 11:30 a.m. to 1 p.m. EDT. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. Learning objectives Participants will learn the analytic methodology of calculating FS-values for veneer soil stability as exemplified […]
GSI Webinar – Applications and Design of Geotextile Tubes – September 7
August 25th, 2022
The Geosynthetic Institute (GSI) will sponsor a webinar, “Applications and Design of Geotextile Tubes,” on September 7, from 11:30 a.m. to 1 p.m. EDT. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. Geotextile tubes are large factory-fabricated textile tubes with multiple access ports for introduction of the infilled material, […]