GSI to host webinar on wick drains, GMA members get discounted rates

November 12, 2018

The Geosynthetic Institute (GSI) will sponsor a webinar entitled “Soil Consolidation Using Wick Drains, aka PVDs” on Nov. 14, from 11:30 a.m. to 1 p.m. EST. The webinar will be hosted by Dr. Robert M. Koerner. GMA member companies and their employees receive discounted rates on all GSI webinar and short course registrations. Wick drains, …

KMS installs PURON PLUS package system in Canada featuring PULSION MBR

October 31, 2018

Koch Membrane Systems (KMS), a leader in the development and manufacture of membrane-based filtration technologies, announced the commissioning of a PURON PLUS packaged MBR system in Saskatoon, Saskatchewan, Canada. The PURON PLUS system provides a compact and turnkey wastewater treatment solution that is fully automated and provides consistent high-quality effluent for safe discharge or reuse. …

HUESKER to host webinar on GEC systems

October 8, 2018

HUESKER will host a free webinar on geotextile encased columns (GEC) on Oct. 8 at 11 a.m. EDT. Oliver Detert, Head of the Engineering Department at HUESKER, will lead the webinar. The geotextile sleeve allows the accommodation of high vertical loads by compensating for the lack of lateral support to the granular columns from the …

GSI’s Koerner to host webinar on the development of geosynthetic drainage, GMA members get discounted rates

August 21, 2018

The Geosynthetic Institute (GSI) will sponsor a webinar entitled “Sand Drains-to-Wick Drains-to-Sand Columns,” on Sept. 12, from 11:30 a.m. to 1 p.m. EDT. The webinar will be hosted by Dr. Robert M. Koerner. GMA member companies and their employees receive discounted rates on all GSI webinar and short course registrations. This webinar will begin with …

O-I chooses steel reinforced geosynthetic drainage improvements for a Texas landfill

May 17, 2018

In December 2017, Owens-Illinois, commonly known as O-I and one of the largest glassmakers in the world, took action to improve the drainage system for their glass container landfill situated near the company’s O-I Waco manufacturing facility in Waco, Texas, Contech Engineered Solutions said in a press release. The consulting engineer worked closely with the …

GSI hosts webinar on MSE wall back drainage design

May 9, 2018

The Geosynthetic Institute (GSI) will sponsor a webinar entitled “MSE Wall Back Drainage Design,” on May 23, 2018, from 11:30 a.m. to 1 p.m. EDT. Within GSI’s database of 301 failed mechanically stabilized earth (MSE) walls reinforced with geogrids or geotextiles, 64% have failed due to water. Furthermore, 73% have been constructed with fine-grained silt …

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Geocomposite drain flow capacity: ISO VS. ASTM

February 1, 2014

From the GMA Techline RE: Geocomposite drain flow capacity: ISO VS. ASTM We are evaluating geocomposite drain products for underdrainage beneath geomembrane-lined ponds. This is an international project—we are considering non-North American products for which the hydraulic properties are based on EN ISO 12958 rather than on ASTM D4716. Would you kindly comment on how …

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Apparent opening size (ASTM D4751) for geotextiles

From the GMA Techline RE: Apparent opening size (ASTM D4751) for geotextiles Our specification calls for a geotextile with an AOS of #50 U.S. sieve (0.3mm). I understand that unlike the rest of the technical property values, AOS is specified by the maximum value (i.e., MaxARV not MARV). Please advise. Does it mean that I …

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More silt fence

From the GMA Techline RE: More silt fence Also, I have another question regarding geo properties and their specifications. Permittivity is an indicator of how well water can flow through the fabric. AOS is an indicator of the soil particle size held back by the fabric. The permittivity specification is a minimum value while AOS …

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Cover veneer stability and freezing

From the GMA Techline RE: Cover veneer stability and freezing I received a question recently from a regulator on whether freezing conditions could result in reduced interface shear strength between a geocomposite drainage layer and a geomembrane for a cover system with three feet of overlying soil. We have not historically seen freezing and ice …