Rep. Rahall: coal-ash dams are a ‘ticking time bomb’

April 1st, 2009

The chair of the U.S. House Natural Resources Committee has called for new legislation, the result of the Tennessee Valley Authority coal-ash dam collapse in Tennessee that sent more than 1 billion gallons of toxic ash pouring over homes, fields, and streams. Rep. Nick J. Rahall (D-W.V.) said coal-ash impoundments across the nation are at […]

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Cohesion (or adhesion) and friction angle in direct shear tests

April 1st, 2009

A technical note regarding interpretation of cohesion (or adhesion) and friction angle in direct shear tests By Richard Thiel Introduction Direct shear testing with geosynthetics is generally performed in accordance with ASTM D5321, Standard Test Method for Determining the Coefficient of Soil to Geosynthetic or Geosynthetic to Geosynthetic Friction by the Direct Shear Method. There […]

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Giroud elected to National Academy of Engineering

April 1st, 2009

Jean-Pierre Giroud has been elected to the National Academy of Engineering (NAE), one of the highest professional distinctions given to an engineer. His election citation reads: “For pioneering research in geosynthetics engineering and its practical application in civil/geotechnical engineering.” J. P. Giroud, chairman emeritus of Geosyntec Consultants, was among 65 newly elected members into the […]

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GSI calls for requests-for-proposals

April 1st, 2009

By Jamie R. Koerner, The Geosynthetic Institute (GSI) has announced a worldwide call for requests-for-proposals (RFPs) focusing on innovative geosynthetics research and development projects. This will be Class No. 2 for this award, the first presented in 2008. There are multiple awards, each for $10,000 per year, and they are renewable pending an annual written […]

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Commentary on Wikipedia®

April 1st, 2009

By Bob Koerner While recently researching various additives used with soil-filled geotextile tubes, I was unsure about subtle differences between flocculation, coagulation, and agglomeration. By simply searching these words on Wikipedia, my indecisions were immediately clarified. I thought to myself, this is a wonderful service! It turns out that others think so as well, since […]

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Geosynthetics 2009 conference is a big hit

April 1st, 2009

With a total of 820 participants, 86 exhibiting companies, 76 papers presented at 22 technical sessions, five short courses, two special sessions, and three impressive keynote addresses, the Geosynthetics 2009 conference and trade show Feb. 25–27 in Salt Lake City was another hit in a series of geosynthetics conferences presented by the Industrial Fabrics Association […]

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Geotextiles in levees (Part 1 of 2)

April 1st, 2009

History, performance, and design of geotextiles in levees: A report from New Orleans By Jody Dendurent and Mark Woodward Abstract Geotextiles are a key element in building levees that will survive catastrophic storms. The geotextile-reinforced earthen levees in New Orleans performed remarkably well during Hurricane Katrina in August 2005. With the current focus on updating […]

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Prefabricated bituminous geomembrane: A candidate for exposed geomembrane caps

April 1st, 2009

By Ian Peggs Landfill caps prevent incident precipitation from becoming leachate that has to be treated, contain landfill gas that can be used to generate electricity, and prevent odors that annoy neighbors. Typically, geomembrane caps are covered with soil and vegetation for appearance and for the construction of parkland and recreational facilities. However, exposed geomembrane […]

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Finland mine features bituminous geomembrane liner

April 1st, 2009

The liner is at the Kittilä Gold Mine in northern Finland. By Bertrand Breul, Mikko Huru, Anton Palolahti Abstract This article will describe the mine in general, including the opening date and the years of operations, and the purpose and construction of ponds to retain pollution. The structure of the bituminous geomembrane (BGM) is more […]

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Project helps open Pennsylvania freeway

April 1st, 2009

Design/build pyrite remediation project using geosynthetics. By Archie Filshill Introduction The Pennsylvania DOT’s Interstate-99/S.R. 6220 project extends from the village of Bald Eagle to the Mount Nittany Expressway (U.S. 322) in Centre County, just west of State College. The project involved the construction of a four-lane, limited-access highway with four interchanges and approximately 18 miles […]

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