An open solicitation to work on development of a new GSI specification for EIA geomembrane

August 1, 2022  |  GSI News

GSI has a long history of writing specifications for geosynthetics. Like all engineered materials, geosynthetics are used in many applications and need general requirements for plans and specifications. When the NSF ceased servicing NSF #54 “Specification for Geomembranes” in 1991, The Geosynthe…
Geotextile covers preserve glacier resources

August 1, 2022  |  Case Studies

In Austria, glaciers are considered a national treasure. During summer, glaciers are covered with geotextiles to preserve the natural ice and snow from the winter season. This minimizes energy expenditures for the production of artificial snow.
My ‘Geosynthetics Superhighway’ journey

August 1, 2022  |  Editorial

As you may have read in former senior editor Todd Berger’s final column in the June/July 2022 issue of Geosynthetics magazine, his journey along the “Geosynthetics Superhighway” has come to an end while mine has just begun.
The lighter side of OSHA

August 1, 2022  |  Update

When most of us hear the word “OSHA,” we instantly conjure up images of ticket-writing cops invading our workplace. And these aren’t the $35 tags that grace our windshield when we linger in a parking spot too long. These citations can easily hit the four- or five-digit mark depending on the se…
Geosynthetic clay liner with aquiclude

August 1, 2022  |  Q&A: GMA Techline

Q: We are trying to design and construct an aquiclude with a geosynthetic clay liner (GCL). Do you have any experience with this application where a GCL has been used as the impervious barrier between a flowing stream and the underlain geologic formation?
Working on an ethylene interpolymer alloy (EIA) specification

August 1, 2022  |  Q&A: GMA Techline

Q: I have an upcoming project that will use ethylene interpolymer alloy (EIA). Is the Geosynthetic Research Institute (GRI) working on a specification for this material?
What is the CSI code for geosynthetics?

August 1, 2022  |  Q&A: GMA Techline

Q: What is the CSI code for geosynthetics?
Do you have experience with T seams?

August 1, 2022  |  Q&A: GMA Techline

Q: I have a question about T-intersections where three panels of geomembrane meet. In my experience these intersections have all needed to be repaired with a patch. However, a recent project fusion welded straight through these intersections. Air channel testing was completed on the first seam prior…
Liner materials that can perform in the toughest applications

August 1, 2022  |  Q&A: GMA Techline

Q: I am working on a 60 mil (1.5 mm) high-density polyethylene (HDPE) that will receive septage leachate. The pH will be below 5 and probably lower. I am looking for technical literature on liner performance at pH levels possibly as low as 2. Thank you for your assistance.
Impregnation as it relates to seaming geosynthetic clay liners

August 1, 2022  |  Q&A: GMA Techline

Q: We are confused with the term “impregnation” as it relates to seaming geosynthetic clay liners (GCLs). There are two types of impregnations: (1) edge impregnation and (2) complete nonwoven (cap layer) impregnation of GCLs. How does a manufacturer do this?