Taking issue with recommendations
April 1, 2008 | News
The “Kam Kotia Project Case Study” in the February/March 2008 issue of Geosynthetics magazine starts off with interesting descriptions of the project design, geosynthetic testing, and construction. However, the summary and recommendations section provides misleading statements. The autho…
Request-for-Proposals
April 1, 2008 | News
The Geosynthetic Institute (GSI) is delighted to announce a worldwide call for requests-for-proposals (RFPs) focusing on innovative geosynthetics research and development projects. There will be multiple awards made, each for $10,000 per year, and they are renewable, pending an annual written report…
Review and analysis of GRI-21 Conference
April 1, 2008 | News
Our 21st annual GRI conference went off without a hitch in Cancún, Mexico on March 5, 2008. The morning session was devoted to geosynthetics in agriculture applications and had seven presentations. Use of geosynthetics in agricultural activities in Taiwan are impressive. The use of large bags…
Geomembrane sealant to concrete pad
April 1, 2008 | Products
From the GMA Techline Subject: Geomembrane sealant to concrete pad— This inquiry is about how to anchor geomembrane to a concrete pad, as well as rendering a perfect seal between the two to prevent water from seeping in between the concrete and the geomembrane. (Schar, London) Reply: Geomembra…
Strength testing
April 1, 2008 | Features
From the GMA Techline Subject: Strength testing— Is there now, or in the works, any industry standard for strength testing the extrusion weld connecting 60-mil HDPE to the poly-loc embedded strip? (Bob, Wisconsin) Reply: There are no generic standards or specifications for the situation you de…
GCLs and slope stability
April 1, 2008 | Products
From the GMA Techline Subject: GCLs and slope stability — I’d like to find out what the current thinking is on designing for slope stability with GCLs … perhaps summarize the current stateof- the-practice regarding residual strength of reinforced GCLs used in bottom liners at land…
Slack calculations
April 1, 2008 | News, Q&A: GMA Techline
From the GMA Techline Subject: Slack calculations — Do you have a reference that discusses the impact of environmental conditions and the procedures for determining “slack” into an HDPE liner at the time of installation? (Rod, California) Reply: The subject of calculating slack in …
Pipeless drainage system
April 1, 2008 | Features
From the GMA Techline Subject: Pipeless drainage system — We are designing residue cells for a mine in northern Minnesota, and they’ve opted for a pipeless drainage system in the cells. The residue is a very fine, saturated, silt-sized particle, quite sticky, low LL/PL. I’ve done a…
Classifying geotextiles
April 1, 2008 | Products
From the GMA Techline Subject: Classifying geotextiles — What is a “Class A” geotextile? (Ron, Maryland) Reply: I don’t know, but it sounds pretty good! I suspect that it comes from a state specification where product values are listed in an ascending or descending order, suc…