FGI short course draws 102

June 7th, 2012

“Constructing with fabricated geomembranes: Advances and current trends for mining” In a June 6 press release, the Fabricated Geomembrane Institute (FGI) described its sixth short course offering, this one in Salt Lake City. The May 21 education event was held at the Multi-Agency State Office Building in cooperation with the Utah Department of Environmental Quality […]

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IGS publishes major engineering document in French

June 6th, 2012

“Recommended Descriptions of Geosynthetics Functions, Geosynthetics Terminology, Mathematical and Graphical Symbols” The International Geosynthetics Society (IGS) announced in a May 31 press release that the IGS French Chapter has translated the engineering document “Recommended Descriptions of Geosynthetics Functions, Geosynthetics Terminology, Mathematical and Graphical Symbols.” Originally drafted in English, this internationally unifying publication has been translated […]

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Full-scale dredging this summer at Onondaga Lake

June 5th, 2012

Geotextile tubes are instrumental in the $451 million Superfund remediation project in upstate New York Dredging and capping of contaminated sediments in Onondaga Lake is set to begin this summer, according to a press release from the New York State Department of Environmental Conservation (DEC). The $451 million Superfund remediation project in Syracuse, N.Y., has […]

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High-temp resilient liner

June 1st, 2012

From the GMA Techline RE: High-temp resilient liner Can you please guide me to suppliers of high-temp, approx. 215 F (100 C) liners? Also, the liner should be able to handle up to 200,000ppm TDS (total dissolved solids) of salts. I am looking for HDPE or similar liner. (Mukesh | Australia) Reply: Wow, what a […]

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MSW landfill cap anchor trench design

June 1st, 2012

From the GMA Techline RE: MSW landfill cap anchor trench design I have been asked by a project manager with my company to design an anchor trench for a municipal solid-waste (MSW) landfill that is being capped using a 40-mil LLDPE (linear low-density polyethylene) geomembrane. Having read through Designing with Geomembranes 5th edition, I was […]

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GCL and HDPE questions

June 1st, 2012

From the GMA Techline RE: Two questions Does a geosynthetic clay liner (GCL) form whales from gas or water pressure, the same way as with a flexible membrane liner (FML), or does gas or water under pressure pass upward through a GCL? When a high-density polyethylene (HDPE) pipe crushes—say, due to lack of bedding when […]

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Question about AOS

June 1st, 2012

From the GMA Techline RE: Question about AOS Can you help telling me how to calculate the apparent opening size (AOS) of a nonwoven geotextile if I have permittivity, permeability, flow rate, and thickness? Is it possible to do? (Jorge | Mexico) Reply: What a great question but, unfortunately, the answer is “No.” The reason […]

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MSE wall connection

June 1st, 2012

From the GMA Techline RE: MSE wall connection? When an MSE (mechanically-stabilized earth) wall is constructed using geosynthetic reinforcement, how is it connected to precast concrete facing? Are metal tabs cast in the concrete or can a geosynthetic product be cast in the precast panel? If this connection is always metal, does the backfill need […]

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Green roofs with geosynthetic materials optimize sustainability

June 1st, 2012

Texas Case Study Introduction Green or vegetated roofs have proven an effective method of reducing the energy load requirements of buildings. Another way green roofs contribute to sustainability is by reducing carbon levels in the atmosphere through carbon sequestration or the removal and storage of carbon. Successful green roofs frequently use a variety of geosynthetic […]

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Geomembrane curtain improves salmon habitat

June 1st, 2012

At the Whiskeytown Reservoir By Bob Gee, Greg Morris, and Stanford W. Slifer Introduction In California’s Central Valley, geomembrane temperature curtains provide an example of how geosynthetic materials can help stabilize environmental conditions along water diversion systems. Located in the Whiskeytown Reservoir, about 10 miles west of Redding in Northern California’s Shasta County, one of […]

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