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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 […]
Automation of large-scale geotextile and geomembrane fabrication
October 1st, 2018
The development of a large-scale fabrication machine was conceived during the fabrication of geotextiles for a tailings pond cap in 2010. The machine joins five strips of material at a time to create fabricated panels for large projects. It is capable of both welding geomembranes and sewing high-strength geotextiles. This machine was specifically designed to […]
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 […]
From Our Readers: Woven monofilament geotextile for glacial soils?
October 1st, 2018
To the editor: Regarding your article “Springtime Failure of a Cold-Climate Geotextile Riprap Slope” in the June/July issue of Geosynthetics magazine, I believe woven slit film (WSF) fabrics are inappropriate as “filter fabric” for subsurface drains or beneath hard armor in erosion control applications. WSF have insufficient porosity, percent open area and permeability to relieve […]
GMA’s geosynthetic education offerings make a difference on campus and Capitol Hill
October 1st, 2018
August 2018 was a great month for the Geosynthetic Materials Association (GMA) and the industry at large. Banner legislation promoting innovative materials was introduced in Congress by friend of the industry Sen. Sheldon Whitehouse, D-R.I. GMA members and industry educators met at the University of Illinois at Urbana-Champaign to educate students about the importance of […]
Geosynthetics and coal combustion residuals
October 1st, 2018
According to the World Bank Group, in 2015 coal produced 41% of the world’s energy and about 34% of the energy production in the United States. While global warming and pollution are serious challenges according to most scientific evidence, and coal burning is cited as one cause of both, there are many staunch advocates of […]
Geocells protect wind turbine generator footings in India
October 1st, 2018
Soil erosion from wind and rainwater runoff was plaguing Suzlon Energy Ltd., exposing the foundations for its twenty wind energy generators (WTGs) at Behpur, Mandsaur, Madhya Pradesh, India. The foundations are circular footings set at shallow depths. Sites for WTGs are selected based on where the intensity of wind is high over a major period […]