A forty-year anniversary for the first hardbound book on geosynthetics

October 1st, 2019

By Robert M. Koerner In the late 1970s, I regularly invited speakers to make presentations to my geotechnical engineering classes at Drexel University. Two of them were very memorable: Bill Ragen of Mirafi and Bill Witherow of Carlisle. Their respective topics were “filter fabrics” and “pond liners,” and in truth I didn’t associate them with […]

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GSI to host webinar on stabilization of soil slopes with anchored geosynthetics

September 23rd, 2019

The Geosynthetic Institute (GSI) will sponsor a webinar, “In-Situ Stabilization of Soil Slopes Using Nailed or Anchored Geosynthetics,” on Oct. 9, from 11:30 a.m. to 1 p.m. EDT. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. The sliding of soil slopes in the […]

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GSI to host webinar on geosynthetics and major applications

August 16th, 2019

The Geosynthetic Institute (GSI) will sponsor a webinar, “A Brief Overview of Geosynthetics and Their Major Applications,” on Sept. 11, from 11:30 a.m. to 1 p.m. EDT. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. Geosynthetic materials presently represent an $8 billion worldwide […]

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The GMA Techline

August 1st, 2019

Moderated by Robert M. Koerner, George R. Koerner and Y. “Grace” Hsuan A geotextile for unpaved driveway/road? Q: Is there any point in using a 150 g/m2 (4.4 oz/yd2) nonwoven geotextile in building an unpaved gravel driveway or gravel road? If so, what should be the most important characteristics of the fabric and what are […]

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GSI short course on MSE walls, berms and slopes now available on demand

June 17th, 2019

The Geosynthetic Institute (GSI) is sponsoring an online course, “Course 2: Construction Inspection of Mechanically Stabilized Earth (MSE) Walls, Berms and Slopes,” available anytime on the GSI website. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. This online course is focused on the […]

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The GMA Techline

June 1st, 2019

Who is doing the testing? Q: This question relates to the number of rolls to be selected as the lot sample for specification conformance testing and refers to ASTM D4354. When I look at this standard, it appears the values in Table 1 of GRI’s White Paper #10 refer to the number of units to […]

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GSI to host webinar on geotextile tubes

May 29th, 2019

The Geosynthetic Institute (GSI) will sponsor a webinar, “Applications and Design of Geotextile Tubes,” on June 12, from 11:30 a.m. to 1 p.m. EDT. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. Geotextile tubes are large factory-fabricated textile tubes with multiple access ports […]

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GSI to host webinar on hydraulic applications

April 17th, 2019

The Geosynthetic Institute (GSI) will sponsor a webinar, “Geosynthetics in Hydraulic Applications,” on April 24, from 11:30 a.m. to 1 p.m. EDT. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. By 2040 it is estimated that two billion people (25% of the world’s […]

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The GMA Techline

April 1st, 2019

Vegetation causing gases under geomembrane? Q: I have a site where we are installing a high-density polyethylene (HDPE) liner in an existing pond. Because of some residual heavy metals in the top layer of soil, I would like to strip off the top 3–6 inches (7.6–15.2 cm) of soil and vegetation. Alternatively, we could mow and […]

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GSI to host webinar on geotextile filters

March 27th, 2019

The Geosynthetic Institute (GSI) will sponsor a webinar, “Geotextile Filters: Concerns and Issues,” on April 10, from 11:30 a.m. to 1 p.m. EDT. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. It is roughly estimated that geotextiles have been used in more than […]

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