Geogrid bags provide shallow water habitat in Seattle

October 1, 2014

Marine mattress installation for new Elliott Bay Seawall By Ron Bygness Why do marine animals need mattresses? A marine mattress, a geogrid bag filled with stone, will provide a shallow water habitat along the new Elliott Bay Seawall in Seattle. This is especially important for small fish, including migrating juvenile salmon. The seven-year reconstruction project …

Hanes acquires ERO-TEX

4th geosynthetics purchase since 2011 By Ron Bygness Winston-Salem, N.C.-based Hanes Geo Components (HGC) announced in an August press release that it has acquired ERO-TEX, a distributor of geotextiles and erosion control materials located in Menomonee Falls, Wis. The acquisition is the fourth for HGC in the past four years: Michigan-based Price & Co. (2011), …

Fish pond lining

Questions and answers from the GMA Techline Fish pond lining We have a project fixing an HDPE liner for a fish pond. Should we use HDPE liner 0.50mm? What would be the suitable covering sheet to protect the pond from UV? (Mustafa | Saudi Arabia) Mustafa, You ask good questions but ones that really require …

Geosynthetics standards and specifications

By Lucie Passus An article reprinted in the spring 2001 issue of ASTM International’s Business Link, on a research project entitled “The Economic Benefits of Standardization,” built the case for companies to support standardization. Some highlights from this article emphasized the following: Short- and long-term cost-savings and competitive benefits are achieved by companies who participate …

Geomembrane patching

Geomembrane patching? Landfill cooling? Puncture protection? Geomembrane patching? Landfill cooling? Puncture protection? Questions and answers from the GMA Techline Geomembrane patching Would it be acceptable to repair an existing 30-mil HDPE geomembrane liner system with 60-mil HDPE geomembrane patches? Is there any research documenting this application? Are there any additional welding preparation procedures required for …

GSI Fellowship Awards announced

By Bob and George Koerner The GSI Board of Directors has made its selections for the GSI Fellowship Awards for academic year 2014-2015. The program recognizes and supports outstanding graduate students researching geosynthetics. The following were selected from 12 new proposals and three renewals. No. Name University Advisor Topic 1-14 Asli Yalcin Dayioglu University of …

Fusion welds

Geomembrane patching? Landfill cooling? Puncture protection? Geomembrane patching? Landfill cooling? Puncture protection? Questions and answers from the GMA Techline Double-track fusion welds Can you offer any guidance on the minimum allowable ambient temperature to perform double-track fusion welds of HDPE and LLDPE geomembranes? Thanks. (Noah | North Carolina) Noah, (1) Regarding the seaming window for …

NAGS meeting report

By Bob Mackey The North American Geosynthetics Society (NAGS) is in the midst of some changes that we want to result in the ability of the society to be more active and have a higher profile within the North American geosynthetics community. Unlike other International Geosynthetics Society (IGS) chapters, NAGS is only one of several …

Geotextile filter

Geomembrane patching? Landfill cooling? Puncture protection? Geomembrane patching? Landfill cooling? Puncture protection? Questions and answers from the GMA Techline Geotextile filter Are there any papers done on the use of a geotextile filter layer below a GCL or CCL? Your assistance in this regard will be much appreciated. (Tian | South Africa) Dear Tian, Thank …

Bentonite compatibility

Geomembrane patching? Landfill cooling? Puncture protection? Geomembrane patching? Landfill cooling? Puncture protection? Questions and answers from the GMA Techline Bentonite compatibility with propylene glycol Are there any issues regarding bentonite GCL compatibility with propylene glycol? Any information you could share would be helpful. Thanks. (Scott | Massachusetts) Scott, There is no issue with respect to …