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Geosynthetic capping sealing system rehabilitates the Croatian Osojnica landfill
December 16th, 2021
The landfill will become a green hill that blends perfectly into the landscape of the idyllic coastal region. Installation of the geosynthetic capping sealing system inside the gabion wall. Photograph courtesy of Naue GmbH & Co. KG The Croatian municipality of Matulji is an idyllic seaside resort on Kvarner Bay in northwestern Croatia, 8 miles […]
Geocomposite lines Anchorage Regional Landfill expansion project
December 13th, 2021
Photograph courtesy Solmax In 2020, the Solid Waste Services department (SWS) of Anchorage, Alaska, expanded the Anchorage Regional Landfill’s capacity by adding a new cell 9 and tying it to several existing cells in close proximity. Alaska Aggregate Products LLC (AAP) was awarded the geosynthetics and piping contract, and AAP chose Solmax to supply all […]
Using bentonite-polymer composite geosynthetic clay liners to contain CCR leachates
October 1st, 2021
FIGURE 1 To tackle tough leachates and shield the environment from hazardous byproducts created by a coal ash site such as this, a GCL is being installed for advanced protection. (Photograph courtesy of CETCO) Coal combustion residuals (CCRs) are the byproducts from combustion in coal-fired boilers that are disposed in lined landfills when they cannot […]
Residual strength of a geosynthetic clay liner
October 1st, 2021
Q: I was wondering if I could get some input about the residual strength of a geosynthetic clay liner (GCL). We have lab results where it is “flatlining” for the residual case (Figures 1 and 2, and Tables 2–4). The GCL is proposed for use in a landfill cell with ultimately a maximum of 98 […]
Geofabrics Australia releases SORBSEAL, GCL for PFAS
August 16th, 2021
Photograph courtesy of Geofabrics Australia The Honorable Glenn Butcher, Queensland (Australia) Minister for Regional Development and Manufacturing and Minister for Water, recently joined Geofabrics Australasia to launch SORBSEAL, a next-generation, hybrid geosynthetic clay liner (hGCL) specifically designed to trap per- and polyfluoroalkyl substances (PFAS) and other harmful emerging contaminants. Geofabrics Australasia is the proud recipient […]
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 […]
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, […]
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 […]
The GMA Techline
June 1st, 2020
Moderated by George R. Koerner Minimum sediment thickness Q: We are going to construct some evaporation ponds on existing sediment on top of a Hypalon geomembrane. The sediment looks to be predominantly fine. The subgrade condition below the liner is not known for sure. In such conditions, can you recommend a minimum sediment thickness that […]
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 […]