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Comparison testing of geosynthetic drainage products
February 1st, 2016
Unlike ASTM D6364 “Standard Test Method for Determining Short-Term Compression Behavior of Geosynthetics,” ASTM D1621 “Standard Test Method for Compressive Properties of Rigid Cellular Plastics” is a testing standard designed to measure the compressive properties of rigid cellular plastics (i.e., foam), not geocomposite drainage products. Unfortunately, the geosynthetic community has been saddled with this test […]
LLDPE Question
February 1st, 2016
“Burnout” occurred when the double-seam fusion welder got stuck as it welded (a stop at a small crease or at times going up a slope) followed by the welder sitting in one spot for a short time causing a burn hole in the LLDPE. The welder continues from that point onward once the situation is […]
Breathable membrane
February 1st, 2016
I am a graduate student pursuing a Ph.D. in environmental engineering. My project involves solving sanitation issues of urban slums in India using breathable membranes. We use a 55-gallon drum lined with this breathable membrane to serve as collection and storage for the fecal matter. We have been pursuing modifications on the project design and […]
New initiatives to promote geosynthetics education in civil engineering curricula
February 1st, 2016
The North American Geosynthetics Society (NAGS) is currently helping to re-establish the “Educate the Educators” (EtE) program. With the support of the Geosynthetic Materials Association (GMA) and sponsors such as the Geosynthetic Institute (GSI), IGS–NA developed a two-day event where experts in the geosynthetics field introduced 40 college professors to various geosynthetic materials and their […]
With a little help from my friends
February 1st, 2016
With the addition of John Gardner (Smith-Gardner Inc. in Raleigh, N.C.) to Geosynthetics magazine’s Editorial Advisory Committee, it reminded me once again to offer my heartfelt thank you’s to this wonderful group that you see listed on the lower-right of this page. So, here goes: Thanks Melody—after many peer reviews, we finally meet at Geosynthetics […]
Lach Huyen Bridge work platforms
February 1st, 2016
Outstanding Achievement Award TenCate Geosynthetics Introduction More than 27km of geotextile tubes were installed to reclaim the 4.1km × 26m work platforms to construct the 600,000m³ dredged sediment containment facility for construction of Lach Huyen Bridge in Vietnam. The in-progress 5.44km (almost 3.5 miles) bridge, which accommodates a four-lane highway, spans across the combined estuary […]
Exposed geomembrane cover
February 1st, 2016
I am evaluating the feasibility of constructing an exposed geomembrane cover on a coal combustion residuals (CCR) fly ash impoundment. The evaluation includes scenarios of: (1) allowing surface water to shed and (2) intentionally impounding water. In reviewing the available literature, I came across your article “Traditional vs. exposed geomembrane landfill covers” (Geosynthetics, October/November 2012). […]
Conductive geomembrane
February 1st, 2016
We are developing a conductive liner. I want to know if there is any kind of small-scale test that I can apply in our laboratory as a quality control test. Pacqua | Mexico Pacqua, Great to hear from you and nice to know that you are developing a conductive GM. What is typically done in […]
Geogrid proven in logging industry demonstration
February 1st, 2016
Introduction During a 2014 logging industry event in the Pacific Northwest, geogrid was used to reinforce portions of a heavily travelled logging road. The demonstration was conducted during the Pacific Logging Congress, 7th In the Woods, held in Molalla, Ore. An aggregate haul road was constructed to demonstrate the difference of an unreinforced road section […]
Spray over HDPE?
February 1st, 2016
Is it possible to spray over an HDPE liner? Can you provide me with spray manufacturers? Abbey | Saudi Arabia Abbey, There is no need to spray on HDPE, and even if you did it wouldn’t stick very easily. Regarding spray manufacturers, just Google “spray applied membranes” and you will get information in this regard. […]