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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 […]
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 […]
Hybrid geosynthetic clay liners for attenuation of PFAS in landfill leachates
October 1st, 2021
An exponential increase in understanding of the provenance, migration, and fate of per- and polyfluoroalkyl substances (PFAS) is evident over the past decade. The environmental and health concerns from this group of contaminants are well recognized, but they are still evolving with advancing studies. A key property of PFAS compounds at a molecular level is […]
Energy industries use HDPE liners for flowback water evaporation/recycling ponds
October 1st, 2021
FIGURE 1 To increase evaporation with low costs in mind, a “weep” system was added at Danish Flats to allow water to flow and fan out over the surface of the HDPE liner that is above the waterline. The problem to be solved is the disposal and recycling of millions of gallons of production water […]
Getting the most out of GeoNashville 2021 and looking toward 2023
October 1st, 2021
Downtown Nashville. Photograph courtesy of Crackerclips, ID 81868104, Dreamstime.com GeoNashville, Nov. 4–5, 2021, at the Music City Center in Nashville, Tenn., is just around the corner. This face-to-face geosynthetics event brings attendees together for 1.5 days of plenary presentations and panel discussions from the Federal Highway Administration (FHWA), U.S. Army Corps of Engineers (USACE), Federal […]
Fall Lobby Day, GeoNashville and Geosynthetic Materials Association Executive Council happenings
October 1st, 2021
GMA is considering options for fall Lobby Day. Photograph courtesy Diego Delso, http://delso.photo, License CC-BY-SA Are you registered for the Fall 2021 Lobby Day, Oct. 20, in Washington, D.C.? Will we see you in person at GeoNashville, Nov. 4–5? As you are reading this, we are preparing for the first two returns to in-person activities […]
New anchorage and connection strength tests for geosynthetics
October 1st, 2021
FIGURE 1 Field anchor pullout test Connections can have a significant impact on the performance of exposed geosynthetic systems. The connection must be considered as a limiting strength factor and evaluated by the same performance standards as the material alone. If used in critical structures with design lives of more than 30 years, the geosynthetic […]
Next-generation geogrid installed under a paved road
October 1st, 2021
Installing the InterAx geogrid. Photograph courtesy of Tensar International In April 2021, Rantoul Foods in Rantoul, Ill., was undergoing an expansion of its building and grounds. A daily, continuous flow of semitrucks delivering livestock required a paved road designed to last. High-quality techniques prevailed throughout construction of the new facility, and the same high quality […]