Service life of nonwovens

August 1, 2021  |  Q&A: GMA Techline

Q: Where can I find literature on the useful service life of nonwoven geosynthetic fabrics installed in soils?
Metal leaching from geosynthetics

August 1, 2021  |  Q&A: GMA Techline

Q: Geosynthetics are made from polymers that use metal-based catalysts in their formulations. Do geosynthetics have the potential to leach metals into the environment?
Bringing geomembranes into equilibrium with atmosphere

August 1, 2021  |  Q&A: GMA Techline

Q: Some ASTM test methods request that one brings the specimens into equilibrium with the atmosphere prior to the test (some of them determine the conditions: 21±2ºC and 60±10% relative humidity). Considering that we just produce polyethylene geomembranes, and they are not significantly affected …
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Koerner Lecture: Geosynthetic-reinforced column-supported embankments: Improving practice with better theory

August 1, 2021  |  Features

This article summarizes the third Dr. Robert M. Koerner Lecture given by the author at the 2021 Geosynthetics Virtual Conference.
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Geosynthetic portable cofferdams for civil construction applications

August 1, 2021  |  Features

Cofferdams are an enclosure built within or across a body of water to allow the enclosed area to be dewatered. This creates a dry working environment so construction can be carried out properly and safely. Typical cofferdams are welded-steel structures consisting of sheet piles, wales or cross brace…
All about GeoNashville and Geosynthetics Conference proceedings/video archive

August 1, 2021  |  Events

GeoNashville 2021, Nov. 4–5, at the Music City Center in Nashville, Tenn., is positioned as the first face-to-face geosynthetics event of 2021 in the U.S. With a theme of “Geotechnical Innovations, Renewed Connections,” GeoNashville will reunite industry friends and colleagues. This 1.5-day, a…
GeoNashville and fall Lobby Day

August 1, 2021  |  GMA News, News

You need to open your calendar and block off Nov. 4–5, 2021, to join us in Nashville, Tenn., for the return to an in-person geosynthetics conference, GeoNashville. The conference features plenary presentations from the Federal Highway Administration (FHWA), the Federal Aviation Administration (FAA…
GSI’s new GCL test method

August 1, 2021  |  GSI News, News

The Geosynthetic Institute (GSI) has a new standard test method for “Determination of the Polymer Loading in Geosynthetic Clay Liners (GCLs).” It was developed over several years without consensus of the membership. GSI forged ahead with it because we see many such products in the market and bel…
Bentonite mats allow fish to migrate

August 1, 2021  |  Case Studies, News

The Schwabentorwehr (Swabian Gate Weir) in Freiburg im Breisgau, Germany, was in disrepair and insurmountable for fish. With the help of bentonite mats, the fish now have a free run again. The historic Schwabentorwehr on the Dreisam River was a federally listed building for monument protection. Howe…
A special issue of Geosynthetics magazine

August 1, 2021  |  Editorial

In this special issue of Geosynthetics magazine, Jie Han, Ph.D., P.E., F.ASCE, of the University of Kansas, the 2021 Dr. Robert M. Koerner Lecturer and Awardee, has written a fascinating article, “Geosynthetic-Reinforced Column-Supported Embankments: Improving Practice with Better Theory,” summa…