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New chapter for geosynthetics
July 1st, 2024
With this issue, Geosynthetics magazine begins a new journey. The Geosynthetics staff has spent the last year talking to our readers to find out what they like about the magazine and how we can improve. Working with the editorial advisory board, industry leaders and knowledge experts, the Geosynthetics team will soon be rolling out some […]
Direct shear machine testing
July 1st, 2024
Q: We just bought a direct shear machine and want to start ASTM D5321 testing. The pneumatic piston applying the vertical loads for normal pressure has a range from a low of 1,124 pounds to a high of 20,000 pounds. Can we use this direct shear box for landfill cover testing? A: Unfortunately, your low […]
Avoid geotextile damage from oil spill cleanup
July 1st, 2024
Q: We are a riverfront landowner with a significant 25-foot (7.6 m) riprap slope protecting our property from erosion and scour. There is a woven monofilament geotextile filter under the riprap to stop the embankment soil from piping into the river. This system has worked well for the past 10 years, even with two 100-year […]
Liner system selection for leakage and performance
July 1st, 2024
Q: We recently relined an aeration pond at a POTW with a 45 mil GRI GM-30 barrier. It was successfully lined for 30 years with a 45 mil CSPE (Hypalon®) liner that was, unfortunately, punctured and torn beyond repair by a fallen tree from outside the fence line. The relined surface impoundment currently is leaking […]
Navigating landfill leachate requirements with geosynthetics
July 1st, 2024
FIGURE 1 After the 20-acre Clarksburg Landfill reached the end of its service life, the city scheduled the design and construction of a remedial landfill closure cap in 2019. The city sought a solution that could meet both EPA and state regulations. How vital is landfill leachate management? Recent guidance from the U.S. Environmental Protection […]
Geotechnical Frontiers short course preview
July 1st, 2024
Geotechnical Frontiers will offer a variety of short courses on Sunday, March 2, 2025. These in-depth courses feature detailed instruction in a small group setting. All courses provide four to eight PDH credits and require a separate registration. Don’t see what you are hoping for? Check out the website for any recent additions. Design and […]
GMA 2024 second-quarter highlights
July 1st, 2024
The Geosynthetic Materials Association (GMA) has been actively engaged in advancing the geosynthetics industry during the second quarter of this year. Let’s take a closer look at some key updates. Build America and Buy American Act GMA has been closely monitoring developments related to the Build America and Buy American Act. These policies impact infrastructure […]
ECTC members ‘cover’ geosynthetic applications with TRMs
July 1st, 2024
FIGURE 1 Turf reinforcement mats (TRMs) in a high flow channel with sediment caught in the mat after the first few flow events. Photo courtesy of ECTC. The Erosion Control Technology Council (ECTC) is a leading industry organization home to top manufacturers of erosion and sediment control products, component suppliers, material distributors and test laboratories. […]
Color, color comparison and color fastness of geomembranes
July 1st, 2024
FIGURE 1 As received and weathered GM specimens The Geosynthetic Institute is developing a new geomembrane specification for colored polyethylene geomembranes. It is called GRI Standard GM-39 “Standard Test Method for Determining the Color, Color Comparison and Colorfastness of Geomembranes.” This method is needed to access color difference as a Manufacturing Quality Control (MQC) tool […]
Koerner announces GSI ascendancy plan
July 1st, 2024
One of the big announcements at the 5th Pan-American Conference On Geosynthetics (GeoAmericas 2024) in Toronto came from George Koerner who announced that he is stepping down as director of the Geosynthetics Institute (GSI) but is not retiring in 2025. “I’m transitioning but certainly not ending my duties,” Koerner said. “GSI is alive and well. […]