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Landfill temperatures
October 1st, 2008
From the GMA Techline Subject: Landfill temperatures — I’ve had discussions with a South African consultant regarding the effects of temperature on the life expectancy of the geomembrane found in South African hazardous landfills. They have tested and found that they are getting temperatures on the membrane of up to 70°C (ca.160°F). He has read […]
Break/yield strengths
October 1st, 2008
From the GMA Techline Subject: Break/yield strength —I am a structural engineer working in Chile. I used the following text from your organization: GM13, GM17, and GM19. About GM13 (Rev.8: July 10, 2006), page 10 from this text shows yield strength and break strength for HDPE geomembrane-textured. The table 2b shows yield strength > break […]
Seams on a sideslope
October 1st, 2008
From the GMA Techline Subject: Seams on a sideslope — I am currently reviewing a design for a piggybacked cell that is an extension of a cell that was built 4 years ago. The issue that I am most troubled by is that the 2 cells meet halfway up the slope of an existing landfill. […]
Alkalinity
October 1st, 2008
GMA techline answers from Bob Koerner Subject: Alkalinity — I am working on a site where there is limestone bedrock. There may be some blasting required that could generate blasted rock fill. Is there a concern with using limestone rockfill with HDPE or polyester-coated geogrids? (Mike, Virginia) Reply: There is no concern over using the […]
Cheaper products
October 1st, 2008
From the GMA Techline Subject: Cheaper? — We are looking for a manufacturer of geosynthetic bags, tubes, and structures that are small and cheap. (Don, California) Reply: “Cheap” I don’t do very well! That said, if you are looking for a vendor other than the usual manufacturers of geotextile tubes and containers, I suspect you […]
Thanks for the info on GRS technology
October 1st, 2008
The article by Michael Adams in the April/May 2008 issue of Geosynthetics, “The GRS bridges of Defiance County,” discusses an “easy as 1-2-3” solution for simple bridge construction. The FHWA integrated bridge system design is straightforward and cost-effective. However, the simplicity of the design disguises some bold innovations. Since their introduction, geosynthetics have generated many […]
Shanghai proceedings available
October 1st, 2008
Geosynthetics in Civil and Environmental Engineering: Geosynthetics Asia 2008, Proceedings of the 4th Asian Regional Conference on Geosynthetics in Shanghai, China,, is available in hardcover (November 2008) by editors Guangxin Li, Yunmin Chen, Xiaowu Tang; list price: $449. Pre-orders are available through www.amazon.com. Editorial reviews and product description Geosynthetics in Civil and Environmental Engineering presents […]
HDPE and PVC
October 1st, 2008
From the GMA Techline Subject: HDPE and PVC — I am looking for reference material that indicates that HDPE liner and pipes, PVC pipes used in a landfill, are physically and chemically resistant to attack by solid waste and leachate. (Barbara, El Salvador) Reply: You ask a very general question that depends on the characteristics […]
Genivar acquires Solmers
October 1st, 2008
The Genivar Income Fund has acquired Solmers Inc., a Quebec-based firm specializing in environmental engineering services, including waste-confinement technology. With this acquisition, combined with its current capabilities, Genivar says it now has a leading position in this sector in Canada, with projects totaling more than 15 million square meters of designed, installed, and controlled geosynthetic […]
New personnel at Profile
October 1st, 2008
Kurt Chirbas has joined Profile Products LLC as market development manager for the company’s western territory, responsible for driving erosion-control product sales, industry education, and research opportunities across more than a dozen states. Prior to joining Profile, Chirbas worked as a project engineer and manager for Advanced Concrete Technologies in Loomis, Calif., and also spent […]