Specification change: ASTM D6364 for drainage materials

May 9, 2016

The specification ASTM D1621 will change in the next issue of the Geosynthetics Specifier’s Guide (December 2016/January 2017). The change is from: Compressive Strength at yield per ASTM D1621 kPa (psi) To: Compressive Strength at yield per ASTM D6364 units kPa (psi) For a complete explanation, read this column from the Geosynthetic Institute.

Burke announces partners for CSPE geomembranes

September 8, 2015

San Jose, Calif.-based Burke Industries announced in a Sept. 8 press release that it has established exclusive strategic partnerships with Colorado Lining International Inc. (CLI) and Layfield Environmental Systems Corp. (Layfield) for the distribution and fabrication of all Burke chlorosulfonated polyethylene (CSPE) geomembrane products and systems. The two companies will manage Burke’s CSPE geomembranes in …

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New ballast system cited in landfill case studies

August 1, 2015

Introduction Exposed geomembrane cover systems such as rain covers and temporary caps are used on landfills throughout the world. While there are numerous benefits associated with exposed membranes, there are also potential hazards associated with insufficient ballasting or anchoring of the cover materials. For years owners and engineers have used various methods for ballasting exposed …

Underground gardens

Efficient landscape engineering and effective geosynthetic materials built Maple Garden Park In Taichung City, Taiwan, city dwellers wandering through Maple Garden Park are actually meandering below ground level. In November 2012, landscape engineers working with the aid of geosynthetic products converted a large hole in the heart of the city into an urban park oasis. …

ASTM announces new geogrid standard

July 21, 2015

A new geogrid test method from the standards organization, ASTM International, has been issued, according to a July 20 ASTM press release. The release said that the test described in the standard—D7864/D7864M, Test Method for Determining the Aperture Stability Modulus of Geogrids—will help ensure that geogrids meet product specific calibrated and validated levels of aperture …

Intertape Polymer Group geomembranes are certified

June 23, 2015

Sarasota, Fla.-based Intertape Polymer Group (IPG) announced in a June 22 press release that its geomembranes have been certified by NSF International, a global public health and safety organization. The release said that NSF has certified IPG’s Aquamaster line of geomembranes to NSF/ANSI 61. ANSI 61 is a certification by NSF applied to products that …

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An approach to approaching zero leakage

June 1, 2015

Panel Discussion: Geosynthetics 2015 Conference February 16, 2015 | Portland, Ore. Session moderator: Ian D. Peggs, I-Corp International Inc., USA Do liners leak? It is said that all liners leak, including geomembranes. They don’t. Double geomembrane liners do not leak into the subgrade. Or do they? What should probably be said is that all single …

Geomembrane would surround buildings

Business asks to test flood-protection shield on former Tuckerton police station By Pat Johnson Since Federal Emergency Management Agency (FEMA) money won’t go far enough to pay for demolition of the former police office on South Green Street that was damaged beyond repair by 2012’s Superstorm Sandy, the Tuckerton [N.J.] Borough Council entertained a presentation …

Geotextile + polyurea pre-sprayed panels

1-2 combo delivers waterproofing at Hawaii water impoundment structure By Del Williams Introduction For decades, polyurea coatings have been spray applied directly to properly prepared concrete, metal, and geotextile substrates on the jobsite using special equipment and trained applicators. However, recent polyurea products and process improvements are now speeding the installation process with even higher …

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Part 2: The first double geomembrane liner 40 years later

April 1, 2015

Constructed in June 1974, it’s been in continuous service ever since then. By J.P. Giroud and J.P. Gourc Introduction The first double liner with two geomembranes was constructed in June 1974 and has been in continuous service since then. The double-lined structure is a water reservoir located in Pont-de-Claix, near Grenoble in southeastern France. The …