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Bringing geomembranes into equilibrium with atmosphere
August 1st, 2021
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 by the relative humidity, do you have any suggestions about how […]
Koerner Lecture: Geosynthetic-reinforced column-supported embankments: Improving practice with better theory
August 1st, 2021
FIGURE 1 Geosynthetic-reinforced column-supported (GRCS) embankment under construction (Photograph courtesy HUESKER Synthetic GmbH) Editor’s Note : Jie Han, Ph.D., P.E., F.ASCE, is the third recipient of the Dr. Robert M. Koerner Award and Lecture Series. The two past recipients are George R. Koerner, Ph.D., P.E. and CQA, in 2017, and Barry Christopher, Ph.D., P.E., in 2019. […]
Geosynthetic portable cofferdams for civil construction applications
August 1st, 2021
FIGURE 1 Four-foot (1.2-m) flood control cofferdams in Greece, N.Y. 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 […]
All about GeoNashville and Geosynthetics Conference proceedings/video archive
August 1st, 2021
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, all-plenary event offers 6 professional development hours (PDH) of education focused on innovations […]
GeoNashville and fall Lobby Day
August 1st, 2021
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) and the U.S. Army Corps of Engineers, as they look at the […]
GSI’s new GCL test method
August 1st, 2021
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 believe there is a need to start the […]
Bentonite mats allow fish to migrate
August 1st, 2021
The geosynthetic-based fish ladder (left) at the Schwabentorwehr in Freiburg im Breisgau, Germany. Photograph courtesy of NAUE GMBH & Co. KG 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 […]