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Ralph Bruno joins Propex as executive vice president
October 15th, 2009
Propex Operating Co. LLC has named Ralph Bruno executive vice president of its new Performance Technology business unit. The restructuring of the business unit with a direct line to the CEO lays the foundation for future growth and increased service to customers, the company said in a press release. The move was described as “an […]
Former Tenax division is now Syntec
October 13th, 2009
“Geosynthetics Evolved” is the credo of the newest manufacturer to enter the geosynthetics industry. Syntec, based in Baltimore, is a newly formed company with many familiar faces. In a recent transaction, Syntec acquired the environmental division of Tenax Corp., a well-known name in polymer extrusion technology for the past 50 years. According to a press […]
Forecast: More wind turbines coming
October 8th, 2009
According to a recent report, the market for wind turbines will continue to grow through 2015, driven by new generation additions as well as replacement of smaller, older turbines with larger, more-efficient turbines. Pike Research, a clean tech market intelligence firm, forecasts that the turbine market will resume its growth in 2011, following three years […]
Erosion control work at Pali Tunnel in Hawaii
October 7th, 2009
Geotextile reinforcement is part of an effort to stabilize a slope at the Pali Tunnel on the island of Oahu. More than 10 tons of mud and debris slid onto the highway there in 2006, closing it for days before the area was cleared and deemed safe. The $700,000 Pali Slope Stabilization Project began in […]
Show us your favorite geosynthetics photo
October 7th, 2009
By Archie Filshill This one has been a favorite of mine for some time. We were asked to complete a leak-location survey to identify the source(s) of a leak in a PVC liner for a decorative pond. The general contractor was responsible for exposing the liner around the perimeter. About five minutes into the job, […]
Floating interface testing for direct shear
October 7th, 2009
From the GMA Techline Subject: Floating interface testing for direct shear Can you give us some guidance on the appropriateness of conducting geosynthetic direct shear testing using “floating” or multiple interfaces? It is our understanding that this method is typically used when the critical interface is not known. (Victoria, USA) Reply: The first test using […]
GSI/GRI-GG5 and ASTM D6706
October 7th, 2009
GMA techline answers from Bob Koerner Subject: GG5 I referenced GSI/GRI–GG5 on a segmented retaining wall system spec and need to know if this is correct. Supposedly on your website this standard was crossed out and noted to refer to ASTM D6706. Should I replace GG5 with the ASTM standard? Please clarify. (Rebecca, New Jersey) […]
Installing prefabricated vertical drains
October 7th, 2009
From the GMA Techline Subject: Geocomposite question We are looking into installing prefabricated vertical drains to relieve excess pore water pressure for a surcharge fill. Following the information listed in Designing with Geosynthetics, 5th Edition, the statement 1-2 meters is the typical spacing for PVDs. Are there any in-depth investigations, studies, or publications that have […]
Geomembrane installations
October 7th, 2009
From the GMA Techline Subject: Geomembrane installations What are the pros and cons of letting a contractor proceed with the installation of a liner when the moisture content is lower than desired? (Marvin, New York) Reply: I have to make some assumptions before I answer your question. I assume that you mean installation of a […]
Liner thickness
October 7th, 2009
From the GMA Techline Subject: Liner thickness I use an equation from your Designing with Geosynthetics, 2nd Edition, to calculate liner thicknesses. Recently, I calculated a geomembrane thickness of 100 mils for a landfill with 200ft of waste. The supplier stated that he had never seen liner that thick used. Upon reviewing other designs, it […]