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Hayward Baker opens new office in Twin Cities
April 1st, 2008
Hayward Baker Inc. geotechnical contractor has opened a new sales, project management, and engineering services office in the Twin Cities. The office is located in Bloomington, near the Minneapolis-St. Paul International Airport and the Mall of America. According to HB, the opening of the Twin Cities office illustrates the continuing growth of the company’s business […]
GeoAmericas 2008: Show wrap-up
April 1st, 2008
Doing business at GeoAmericas-2008: An energetic business hall. Good to see old friends, fun to meet new friends. First-rate, well-attended technical session and keynotes. Fiesta, fiesta, fiesta
Taking issue with recommendations
April 1st, 2008
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 author writes, “As per the GRI’s White Paper of April 2005: Do not use GCLs with needlepunched nonwoven […]
Request-for-Proposals
April 1st, 2008
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, to a total amount of $25,000 per student. It is important to note […]
Review and analysis of GRI-21 Conference
April 1st, 2008
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 for silage and capture of animal waste for gas […]
Geomembrane sealant to concrete pad
April 1st, 2008
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: Geomembrane anchorage to concrete surfaces is generally accomplished […]
Strength testing
April 1st, 2008
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 describe. People tend to copy sketches and materials from others […]
GCLs and slope stability
April 1st, 2008
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 landfills. (Myron, Washington) Reply: Of course, there are ongoing tests […]
Slack calculations
April 1st, 2008
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 geomembranes for the purpose of backfilling, and then having the lower […]
Pipeless drainage system
April 1st, 2008
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 little work with geotextiles, but my gut tells […]