GMA history and happenings

April 1, 2020

By Andrew Aho Throughout the history of geosynthetics, leaders have emerged who have significantly affected the growth of the industry in North America. During the Geosynthetics CASE STUDIES Conference in March in North Charleston, S.C., a few of the Geosynthetic Materials Association (GMA) leaders had an opportunity to address the gathering and recall their personal …

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Geosynthetic strip MSE wall at Point Defiance Marina

By Paul C. Frankenberger and Robert Lozano  This article will focus on a geosynthetic strip mechanically stabilized earth (MSE) wall case study using discrete geosynthetic strips with large precast facing panels (Figure 1), an innovation of the original MSE invention. The system is the Highway Innovative Technology Evaluation Center/National Transportation Product Evaluation Program reviewed GeoMega …

How does your geosynthetic react to changes in temperature?

An essential aspect of geosynthetics is that they function well over a large range of temperatures in either buried or exposed environments. There has been much work in this area; see Giroud and Morel (1992), Koerner and Koerner (1995 and 2006), Lord, Soong and Koerner (1995), and Tsuboi, Imaizumi and Miyaji (1998). Most of the …

The GMA Techline

Moderated by George R. Koerner and Y. “Grace” Hsuan Welding Rod Q: This question is in regard to the welding rod intended for welding of geomembranes (both high-density polyethylene [HDPE] and linear low-density polyethylene [LLDPE]). Are there any GRI GM13- or GM17-based requirements for welding rods or are there any white papers or specifications? I …

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Construction water flow dynamics of the leak detection layer

By Abigail Gilson-Beck and Larry Shilling The double-lined containment facility featuring a leak detection system (LDS) is the most accurate way of assessing leakage through a primary geomembrane (Bonaparte and Gross 1992). This type of system also represents the gold standard for environmental protection, since leakage through the primary liner is collected and removed so …

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CSPE performance and history in long-term potable water storage applications

By Brian Fraser, Steven Roades, Mike Neal and Alex Gersch Chlorosulfonated polyethylene (CSPE) is a synthetic rubber-based material manufactured by a calendaring process into multiple layers and combines with a polyester reinforcement fabric for additional strength. Hypalon is a DuPont trademark for CSPE synthetic rubber (CSM) noted for its resistance to chemicals, temperature extremes and …

International Achievement Awards

Recognizing design excellence in geosynthetics The International Achievement Awards, sponsored by the Industrial Fabrics Association International (IFAI), recognize innovation, technical skill and design excellence in geosynthetic applications.  The awards are an annual competition promoting awareness of the specialty fabrics used in thousands of products and applications ranging in size and shape. For more than 70 …

Letter from the IGS-NA chair

The North American Chapter of the International Geosynthetics Society (IGS-NA) had a productive 2019, and we are looking forward to several exciting activities in 2020. We held the third installment of Educate the Educators in December 2019 in La Jolla, Calif.  In addition, IGS-NA was a sponsoring organization of the Geosynthetics Conference 2020: CASE STUDIES, …

Geosynthetics Conference 2021

Participate in the co-located program Start making plans now to not only join us in Kansas City, Mo., Feb. 21–24, 2021, but to be a part of the program. Geosynthetics Conference 2021 features the second co-location with the International Erosion Control Association’s Annual Conference. The last time these two shows got together (Portland, Ore., in …

Geosynthetics: An extraordinary handler of water

Most geosynthetics deal with water in some shape or form. Geosynthetics are an extraordinary handler of water, whether the project involves erosion control, water storage, wastewater, stormwater, seawater or mining. This issue of Geosynthetics looks at water applications in several forms. Drainage, leak detection layers, potable water storage, a mechanically stabilized earth (MSE) wall at …