Geocomposite lamination strength ASTM test method: Time for an update

August 1, 2018

Recent project experience that included continuous peel testing across the roll width of geocomposite materials has shed light on the issue of peel strength between geotextiles and geonets that are heat-bonded together. The variability of peel strength across a roll width is found to be much greater than expected, with the typical standard deviation often …

Geosynthetics use expands in mining and ore processing

The estimated value of nonfuel mining of raw materials in the United States alone totaled $75.2 billion in 2017, according to an annual report by the U.S. Geological Survey (USGS). Everything from aluminum to zinc falls into this massive category, but that dollar figure is dwarfed by the USGS’s estimate in that same report of …

Talking geosynthetics with Congressman Bruce Westerman

One of the few professional engineers in Congress, Republican Rep. Bruce Westerman of Arkansas pulls no punches when discussing the potential use of geosynthetics in federal infrastructure projects. “I think geosynthetics should be part of the toolkit,” Westerman said during a phone interview with Geosynthetics magazine on May 19. First elected to Congress in 2014 …

GMA on Wisconsin, waste containment and Lobby Day

April and May were very active months for the Geosynthetic Materials Association (GMA). Our membership coordinated an educational opportunity in the state of New York, made a lobbying trip to Wisconsin and supported Infrastructure Week by advocating for geosynthetics in the nation’s capitol. GMA heads to Wisconsin On Apr. 9, 2018, members of the GMA …

Panorama

Tensar arranges Australian distribution for mining geosynthetics Tensar International announced June 15, 2018, that Chris Taylor of C&C Taylor Enterprises (CCTE) has agreed to become the exclusive distributor agent for Tensar Underground Mining Products in Australia. For more than 40 years, Taylor has worked in various mining industry roles, from the shop floor to director, …

Case studies using EPS geofoam for mining and energy

The complexities of the built environment continually challenge the limits of engineering and construction. For infrastructure built-in areas with settlement-prone soils or other hazardous geological conditions, assembling a team of experts to plan for challenges is essential. Industries like mining, oil and gas, and utilities must often bore through earth and rock to build tunnels, …

Don’t be afraid of making horizontal geomembrane seams on side slopes

Over the years, there have been many discussions raising concerns about having geomembrane field seams located horizontally on side slopes. By not allowing such seams, it usually results in many short roll lengths that become either unused or difficult to tailor into the flat area of the project. Stated differently, the installation costs increase accordingly. …

IGS-NA focuses on the Geosynthetics Conference 2019, service award and webinars

In this edition of the IGS-NA News column, the board of directors gives a special thank-you to John Allen for putting together a strong list of speakers for our educational webinars this year. IGS-NA supports Geosynthetics Conference 2019 The North American Chapter of the International Geosynthetics Society (IGS-NA) supports the next edition of the long-running …

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The GMA Techline answers all

UV Weathering of Geotextiles Q: My firm is providing construction quality assurance services for a landfill cell expansion. We are having an issue with our contractor and are going to be in a position of having 8 ounces/square yard (271 g/m2) of nonwoven geotextile exposed for a period of time, which exceeds the seven-day limit …

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Safe storage of mining waste focus of report

In December 2017, the United Nations Environment Programme (UN Environment) and GRID-Arendal, an organization that supports environmentally sustainable development in partnership with UN Environment and other collaborators, published “Mine Tailings Storage: Safety Is No Accident.” The report recommends mining companies adopt simple steps to reduce environmental destruction and death by changing the way they store …