Transmissivity: An ambiguous contradiction

February 1, 2008  |  Features

By Richard Lacey, TRI Environmental Introduction Specifying the transmissivity of a drainage product seems straightforward. There are only two approaches defined in the governing test method. One is to specify the required transmissivity, while the other is to specify the required in-plane flow rate…
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Testing produces design guidance

October 1, 2007  |  Features

Follow this new anti-scour mat product through the testing process. By Michael D. Robeson Abstract A new product with the application of culvert and stormwater outlet scour protection was tested at Colorado State University. The objective of the testing was to determine the hydraulic and sediment st…
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Geotextile compatibility

October 1, 2007  |  Features

From the GMA Techline Subject: Geotextile compatibility— Is there any lab testing method or norm verifying the compatibility between polypropylene nonwoven geotextiles and shotcrete or concrete? Is ISO 12960 relevant? My question derives from my need to prove compatibility between this geotext…
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Use of geosynthetics in the mining and mineral processing industry

August 1, 2007  |  Features

By Karin Renken, David Mchaina, Ernest Yanful Introduction This article gives a brief overview and a summary of the results of research work conducted under the 2003 North American Geosynthetics (NAGS) Award of Merit. The NAGS awards were initiated in 1989 as an industry sponsored program to recogni…
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Liner integrity/leak-location survey: The significance of boundary conditions

February 1, 2007  |  Features

By Ian D. Peggs Introduction A geoelectric integrity survey was requested on a new landfill cell with the following lining system from the top down: 18 in. sand Geotextile/geonet/geotextile composite (geocomposite) Primary geomembrane Geosynthetic clay liner (GCL) Geomembrane (rub sheet) Geocomposit…
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ECTC’s updated technical manual now available

February 1, 2007  |  Features

A revised and updated guidance document by the Erosion Control Technology Council (ECTC) is now ready for industry professionals. Titled “A Technical Guidance Manual: Terminology, Index & Performance Testing Procedures for Rolled Erosion Control Products,” can be found on ECTC’…
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Geosynthetics: Update from Korea

June 1, 2006  |  Features, News

The infusion of geosynthetics in Korea has been accomplished in a relatively short time. A look at potential growth, research, and markets. By Han-Yong Jeon 1. Introduction The geosynthetics industry in Korea is a promising field for investment and development. Many types of domestic geosynthetic pr…
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Initial feedback from CQA-ICP testing

June 1, 2006  |  Features

By George R. Koerner and Robert M. Koerner During the course of three summers (1988, 1990, and 1992) a team of speakers was put together by Bob Landreth of the U.S. Environmental Protection Agency to travel to each of the EPA’s 10 regions to teach and to explain the agency’s regulations …
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Construction Quality Assurance and Inspectors Certification Program (CQA-ICP)

April 1, 2006  |  Features

By George R. Koerner and Robert M. Koerner GRI White Paper #8January 31, 2006 1.0 Definition of CQA (as opposed to CQC) Construction quality assurance (CQA) and construction quality control (CQC) are widely recognized as critically important factors in overall quality management for waste containmen…
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The influence of geogrid’s geometry and structure on interface behavior

January 1, 1970  |  Features

European experience in pullout tests By Daniele Cazzuffi, Lidia Sarah Calvarano, Giuseppe Cardile, Nicola Moraci, and Piergiorgio Recalcati 1. Introduction The use of geosynthetics to improve the soil mechanical response has become increasingly common practice in geotechnical engineering application…
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