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New polyurethane composite expected to extend German North Sea defenses
October 1st, 2010
Editor's Note: This article and two interesting sidebars were published in the October/November 2007 issue of Geosynthetics. Comment From: David, U.K. Posted: Aug. 18, 2010 U.K. farmers are being encouraged to partner with the Environment Agency to help maintain the sea walls that protect their land. Farmers may be licensed to undertake minor repairs. Repair […]
Examples of paradigm confusion in the June/July 2010 issue of Geosynthetics
October 1st, 2010
To the editor: “Magic” is an appropriate description where the two significant elements of very different properties are combined to produce a unique composite stronger than either element. Concrete and asphaltic concrete are two examples of “unique composites.” Unique composites exhibit behaviors that exceed the sum of the constituents and cannot be accurately modeled using […]
Optimization of anchor trench design for solar evaporation ponds
October 1st, 2010
By Richard Thiel Abstract Ponds with exposed geomembranes on their sideslopes are susceptible to wind forces, which must be resisted by properly designed anchorages at the slope crest. The most common anchorage is an earth-filled anchor trench. This article describes improved methods used to optimize the anchor trench design to conserve material and minimize earthwork […]
Life after golf: The greening of Cheviot Hills
October 1st, 2010
By Chris Kelsey Historic Cheviot Hills Golf Course opened in Raleigh, N.C., in 1930. But during the early 2000s, declining economic conditions and an abundance of golf courses in the region forced some course owners to make challenging decisions about whether to continue operations. Cheviot Hills’ ownership chose to shutter the course and put up […]
Cameron Airpark combines old and new technologies on its ‘streetways’
October 1st, 2010
By Ray Myers Background Cameron Airpark Estates, about 20 miles east of Sacramento, Calif., is a unique residential community and airport. In 1950, Larry Cameron, a former champion rodeo rider and successful auto dealership entrepreneur, envisioned a place where residents could play golf, swim in a lake, and even enjoy the benefit of their own […]
Green roof market growth: Opportunities and challenges
October 1st, 2010
By Dhani Narejo Introduction The forecast for the North American roofing market is an anticipated worth of $18 billion in 2014(1) with the most rapid gains expected in alternative roofing technologies, including green roofs. This is good news for the geosynthetics industry. While traditional roofs do not use any geosynthetics materials, green roofs use many. […]
What about selenium and coal ash?
October 1st, 2010
Editor's Note: The article, “GMA speaks up during EPA coal ash hearing,” prompted the following comment and response. What about selenium and coal ash? From: Dennis Lemly Posted: Sept. 13, 2010 Your cited data source does not measure selenium in the leachate from the coal ash disposal site, or any other for that matter. It […]
GG3-87
October 1st, 2010
From the GMA Techline RE: GG3-87 I was wondering if guideline GG3-87 is still in use. If it is, could I get a copy? Thank you. (Jason | Kentucky) Reply: Good question and, as with many other GRI Standards, we have given the GRI method to ASTM, which now has a replacement. The replacement for […]
Availability of Hypalon
October 1st, 2010
From the GMA Techline RE: Hypalon I am looking for a chlorosulfonated polyethylene AD-007. We used to use Hypalon but we received a notice a few months ago that chlorosulfonated resin will no longer be produced. Can you help us to find some companies that produce and sell this type of membrane? (Jorge | Mexico) […]
Geo mat for reinforcement when needed
October 1st, 2010
From the GMA Techline RE: Reinforcement We have a dirt area at our recycling center that large trucks drive on and, during normal conditions, the soil is stable. However, problems arise after heavy rains and it becomes difficult for the trucks to drive on. So, we are looking for a “geo mat” that we can […]