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 […]
Geosynthetic clay liners in landfill engineering
July 20th, 2021
Installing a geosynthetic clay liner at a landfill. Photograph courtesy of ACF Environmental A critical component of a well-conceived waste management plan, landfills are highly engineered facilities. In particular, the design and management of municipal solid waste (MSW) landfills carry environmental significance. The site, design, construction and operation of landfills require stringent compliance with government […]
Mining tailings management with geosynthetics
June 30th, 2021
Tailings are by-products, the materials that remain after the process of separating the target mineral from the uneconomic fraction of an ore. They are different from the waste rock or other material that overlies an ore or mineral body, which are displaced during mining without being processed. Tailings can be liquid, solid or a slurry […]
GCLs in cold temperatures
June 1st, 2021
Q: I am working on supporting a guide (independent) on what to consider when geosynthetic clay liners (GCLs) are installed in minus temperature regions (e.g., –4˚F [–20˚C]). There is not much published on this, especially independently. This is the only thing I found: Designation: D6102-20Standard Guide for Installation of Geosynthetic Clay Liners5.3.8 The GCL should […]
CETCO’s new RESISTEX Universal GCL Series unveiled
February 2nd, 2021
As a new class of polymer-modified geosynthetic clay liners (GCL) that will be added to CETCO’s existing RESISTEX GCL family, the RESISTEX Universal GCL series performs well against calcium chloride (CaCl2). CETCO can now offer customers a comprehensive portfolio of solutions to address a wide spectrum of leachates. Designed to withstand medium- to high-strength leachates, […]
CETCO unveils RESISTEX Universal Geosynthetic Clay Liner series
November 11th, 2020
At this year’s GeoAmericas 2020 Online conference, CETCO paid homage to the event’s motto, “Geosynthetics Solutions for a Fast-Changing World,” by introducing its innovative geosynthetic clay liner (GCL) line extension, the RESISTEX Universal GCL series. As a new class of polymer-modified GCLs that will be added to CETCO’s existing RESISTEX GCL family, the RESISTEX Universal […]
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 […]
CETCO launches BENTOMAT DN-HS geosynthetic clay liner
February 13th, 2020
CETCO, a leader in geosynthetic clay liners (GCLs) manufacturing, has released the BENTOMAT DN-HS geosynthetic clay liner, a new addition to the BENTOMAT product portfolio that uses proprietary, high-density needlepunching technology to generate superior peak shear strength properties for slope stability. The product is ideal for containment systems that exist in seismic areas and high […]
ASTM hosting GCL workshop in Denver
May 21st, 2019
The American Society for Testing and Materials (ASTM) will hold the workshop “Advances in Characterization of Hydraulic Barrier Performance of GCLs” at the Sheraton Denver Downtown Hotel in Colorado on June 5. Chaired by Kent von Maubeuge of NAUE GmbH & Co. KG, the workshop will cover test prescription, long-term hydraulic performance, equipment and laboratory […]