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Leister introduces SEAMTEK W-900 AT low-voltage wedge welder
October 12th, 2018
Leister Technical Textiles has released the SEAMTEK W-900 AT low-voltage wedge welder, an energy efficient and safe welder with direct transmission of power to a thin welding wedge. The W-900 welds at a speed of 98 feet (30 m) per minute, uses no energy when in standby mode, can reach the desired target temperature in […]
Get listed in the Geosynthetics 2019 Specifier’s Guide
October 1st, 2018
The annual call for listings in the Geosynthetics 2019 Specifier’s Guide opened September 19. Thousands of companies, engineers and government agencies turn to this annual guide to purchase products and services. This comprehensive resource lists suppliers of geotextiles, geomembranes, geogrids, geosynthetic clay liners, drainage materials, geocells and erosion control materials, as well as services related […]
The many applications for geosynthetics in the energy sector
October 1st, 2018
The opportunities for geosynthetics in energy applications are nearly endless. There are huge energy categories, such as oil, natural gas and coal, but geosynthetics also play a role in nuclear energy, hydropower, wind power and solar power, among others. Geosynthetics line storage tanks, support roads to remote sites, line tailings ponds, provide filtration, dewater coal […]
The GMA Techline
October 1st, 2018
Toxicity of nonwovens? Q: Are there any comprehensive tests (or a general synopsis) of the environmental toxicity of leachate from nonwoven polypropylene fabrics when aged in a freshwater or saltwater solution? Regulatory and municipal bodies in Europe and New Zealand are requesting more info about products that are used in riparian and coastal environments. A: […]
Geo19 Watch: Inaugural IAGI GeoGames debuts at Geosynthetics Conference 2019, Plenary lineup announced
October 1st, 2018
The International Association of Geosynthetic Installers (IAGI) is hosting the inaugural GeoGames on Feb. 12, 2019, in Houston, Texas, during Geosynthetics Conference 2019. The outdoor event, to be held in a park across the street from the conference, will feature welding competitions by teams of installers. All Geosynthetics Conference 2019 participants are invited to attend […]
Geosynthetics opportunities and solutions in shale gas extraction
October 1st, 2018
While natural gas contained within shale rock is geologic and thus ancient by its very nature, the practice of its removal by horizontal drilling coupled with hydrofracking is a relatively recent development (Figure 1). Indeed, these dual technologies are making possible the recovery of huge amounts of natural gas—so much so that one can envision […]
Barry R. Christopher honored with 2018 Koerner award and lecture series
September 11th, 2018
The Geosynthetic Materials Association (GMA), led by a Koerner awardee selection task force, selected Barry R. Christopher, Ph.D., P.E., as the recipient of the 2018 Dr. Robert M. Koerner Award and Lecture Series. The award and lecture series is named for Dr. Robert M. Koerner, Ph.D., the founder and director emeritus of the Geosynthetic Institute […]
Geosynthetics installers to compete in GeoGames during 2019 Geosynthetics Conference
August 27th, 2018
The International Association of Geosynthetic Installers (IAGI) will host the inaugural Geo Games at the 2019 Geosynthetics Conference in Houston, Texas, on Feb. 12, 2019. The remarkable proficiency and skills utilized by geosynthetic installers displayed in the competition will highlight both the quality and speed of professional industry installers. Teams will be charged with welding […]
Don’t be afraid of making horizontal geomembrane seams on side slopes
August 1st, 2018
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. […]
The GMA Techline answers all
August 1st, 2018
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 […]