Tensar takes legal action in Canada vs. Enviro-Pro Geosynthetics

October 7th, 2014

 Lawsuit cites infringement of geogrid patent Atlanta-based Tensar International has filed a patent infringement lawsuit in Canada against Enviro-Pro Geosynthetics Ltd., a reseller of geogrid manufactured in China by Taian Modern Plastic Co. Ltd. (TMP), according to a Tensar press release issued Oct. 7. The Canada lawsuit is pending in Federal Court in Ottawa, […]

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Specifier’s Guide 2015-Don’t be left out

October 2nd, 2014

 Company directory listings, product data spec charts The annual Specifier’s Guide by Geosynthetics magazine is going to press in a few weeks. Do not be left out of the 2015 edition. The Specifier’s Guide is the most trusted industry resource, used throughout the year by more than 35,000 industry professionals in 55 countries for […]

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Water, water, water

October 1st, 2014

By Ron Bygness Eight years ago, I interviewed Ernie English. At that time, Ernie was with GSE and was the chairman of the Geosynthetic Materials Association’s Executive Council. I asked him several questions about the state of the geosynthetics industry, about market opportunities, about some historical perspectives. Then I asked Ernie about the future for […]

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Design considerations for GCLs in leach pad liner systems

October 1st, 2014

By Chris Athanassopoulos and Mark Smith Introduction Traditionally, leach pad lining systems have consisted of a single geomembrane liner placed directly over a prepared subgrade of locally available soil or, occasionally, compacted clay. Heap fills are most commonly constructed by placing a layer of highly-permeable drainage stone (overliner) over the geomembrane, usually with perforated drainage […]

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Allowable stress on geonets based on laboratory creep tests

October 1st, 2014

By Dhani Narejo and Sam Allen Introduction The first article in this three-part series presented compressive stress-strain behavior of several different geonet structures. The collapse, or rollover, does not occur for many types of geonets. In the absence of a rollover, the compression of geonets is non-linear in most cases with the compression rate being […]

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Geofoam SIPs: Thinking outside the (stick-framed) box

October 1st, 2014

Introduction In this decade of emerging technologies that seek to decrease carbon footprints, structural insulated panels (SIPs) have come of age. More architects and builders are thinking outside the box when designing with SIPs-creating beautiful buildings that approach net zero energy use and offering some surprising extras-while incorporating aesthetically pleasing design elements. SIPs have been […]

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Wakeboarding lakes get synthetic turf revetments

October 1st, 2014

Erosion control, turbid water addressed with new shoreline protection By Paul O’Malley Introduction The newly opened Terminus Wake Park is located within the LakePoint Sporting Community and Town Center Complex in Emerson, Ga., just off Interstate 75, about 30 miles northwest of Atlanta. This park represents one of the latest examples in a growing trend […]

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Puncture protection

October 1st, 2014

Geomembrane patching? Landfill cooling? Puncture protection? Geomembrane patching? Landfill cooling? Puncture protection? Questions and answers from the GMA Techline Geomembrane puncture protection I am sizing a cushion geotextile that will be protecting a 40-mil LLDPE closure geomembrane against 2in.–4in. crushed, angular gravel. I understand that the equation for factor-of-safety (FS) against puncture, as presented in […]

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Fabric-formed shells

October 1st, 2014

Geomembrane patching? Landfill cooling? Puncture protection? Geomembrane patching? Landfill cooling? Puncture protection? Questions and answers from the GMA Techline Building fabric-formed concrete thin shells Any suggestions on the type of geogrid or geoweb fabric I can use for shaping and reinforcing thin-shell concrete domes? (Ted | USA) Ted, You ask a great question and one […]

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Bentonite compatibility

October 1st, 2014

Geomembrane patching? Landfill cooling? Puncture protection? Geomembrane patching? Landfill cooling? Puncture protection? Questions and answers from the GMA Techline Bentonite compatibility with propylene glycol Are there any issues regarding bentonite GCL compatibility with propylene glycol? Any information you could share would be helpful. Thanks. (Scott | Massachusetts) Scott, There is no issue with respect to […]

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