The lighter side of OSHA

August 1, 2022  |  Update

When most of us hear the word “OSHA,” we instantly conjure up images of ticket-writing cops invading our workplace. And these aren’t the $35 tags that grace our windshield when we linger in a parking spot too long. These citations can easily hit the four- or five-digit mark depending on the se…
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Geosynthetic clay liner with aquiclude

August 1, 2022  |  Q&A: GMA Techline

Q: We are trying to design and construct an aquiclude with a geosynthetic clay liner (GCL). Do you have any experience with this application where a GCL has been used as the impervious barrier between a flowing stream and the underlain geologic formation?
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Working on an ethylene interpolymer alloy (EIA) specification

August 1, 2022  |  Q&A: GMA Techline

Q: I have an upcoming project that will use ethylene interpolymer alloy (EIA). Is the Geosynthetic Research Institute (GRI) working on a specification for this material?
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What is the CSI code for geosynthetics?

August 1, 2022  |  Q&A: GMA Techline

Q: What is the CSI code for geosynthetics?
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Do you have experience with T seams?

August 1, 2022  |  Q&A: GMA Techline

Q: I have a question about T-intersections where three panels of geomembrane meet. In my experience these intersections have all needed to be repaired with a patch. However, a recent project fusion welded straight through these intersections. Air channel testing was completed on the first seam prior…
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Liner materials that can perform in the toughest applications

August 1, 2022  |  Q&A: GMA Techline

Q: I am working on a 60 mil (1.5 mm) high-density polyethylene (HDPE) that will receive septage leachate. The pH will be below 5 and probably lower. I am looking for technical literature on liner performance at pH levels possibly as low as 2. Thank you for your assistance.
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Impregnation as it relates to seaming geosynthetic clay liners

August 1, 2022  |  Q&A: GMA Techline

Q: We are confused with the term “impregnation” as it relates to seaming geosynthetic clay liners (GCLs). There are two types of impregnations: (1) edge impregnation and (2) complete nonwoven (cap layer) impregnation of GCLs. How does a manufacturer do this? 
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Geosynthetics in green roofs

August 1, 2022  |  Features

To talk about geosynthetics on green rooftops is to talk about an opportunity to change and make an environmental improvement in the world. The growing need to create awareness of an ecological responsibility and the environment has allowed this concept to spread more successfully.
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Wick drain ground improvements

August 1, 2022  |  Features

Construction of a large mine waste stockpile was required at the Rainy River Mine in Ontario, Canada. The mine rock stockpile foundation has up to 131 feet (40 m) thick of low to high plastic, slickensided and lightly overconsolidated clay deposits. The stockpile required foundation ground improveme…
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Reinforced soil wall with geogrids

August 1, 2022  |  Features

Mechanically stabilized earth walls (MSE) are containment structures that have gained considerable popularity over the last few years due to their various benefits: constructive, environmental and economic. There are several types of reinforced earth walls, which vary according to the type of materi…
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