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The GMA Techline
August 1st, 2020
Seaming dissimilar geomembranes Q: I kindly request your technical support in the questions below: A nonpolyethylene geomembrane was used in phase 1 of the tailings dam waterproofing system of a gold mine. For the expansion (phase 2), the use of a high-density polyethylene (HDPE) geomembrane is being evaluated. How can the HDPE geomembrane join the bituminous […]
GSI to host webinar on UV resistance of geosynthetics
June 27th, 2020
The Geosynthetic Institute (GSI) will sponsor a webinar, “Ultraviolet (UV) Resistance of Geosynthetics,” on July 8, 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. Geosynthetics are polymeric products used to solve civil engineering challenges, typically belowground. […]
GSI to host webinar on geosynthetic drainage materials
June 10th, 2020
The Geosynthetic Institute (GSI) will sponsor a webinar, “Geosynthetic Drainage Materials: Applications, Design, Installation and Performance,” on June 17, 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. Geosynthetic drainage materials consist of a drainage core (geonet […]
Test method for determining leakage through imperfections in GMs of a composite liner system
June 1st, 2020
George R. Koerner This article describes a large-scale test method intended to determine the leakage through imperfections in a geomembrane (GM) under a given head. It can be used as a performance test to simulate field conditions where the GM is physically breached. The test method places a GM test specimen of 2 feet (0.6 […]
GSI to host webinar on sustainability with geosynthetics
May 29th, 2020
The Geosynthetic Institute (GSI) will sponsor a webinar, “Sustainability with Geosynthetics,” on June 10, 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. There is a tremendous amount of infrastructure throughout the world. As it ages, it […]
GSI to host webinar on lifetime durability of geosynthetics
May 20th, 2020
The Geosynthetic Institute (GSI) will sponsor a webinar, “Lifetime Durability of Geosynthetics,” on May 27, 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. The need to know the approximate lifetime of geosynthetics is paramount in deciding […]
GSI issues request-for-proposals for graduate student fellowships
May 18th, 2020
The Geosynthetic Institute (GSI) announces a worldwide request-for-proposals (RFP) focusing on innovative geosynthetics research and development projects. There will be several awards given, each for $5,000. Emphasis will be placed on relevant topics of interest and/or concern to the geosynthetics community. The proposals must be submitted in the following four-page format: Page 1 – Letter […]
GSI to host webinar on geotextile filters
May 12th, 2020
The Geosynthetic Institute (GSI) will sponsor a webinar, “Geotextile Filters: Concerns and Issues,” on May 20, 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. It is roughly estimated that geotextiles have been used in more than […]
GSI to host webinar on geotextile tubes
May 4th, 2020
The Geosynthetic Institute (GSI) will sponsor a webinar, “Applications and Design of Geotextile Tubes,” on May 13, 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 […]
GSI to host webinar on MSE inspection
April 27th, 2020
The Geosynthetic Institute (GSI) will sponsor a webinar, “Mechanically Stabilized Earth (MSE) Wall, Berm and Slope Construction Inspection,” on May 6, 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. The inspection (aka monitoring) of MSE wall, […]