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Test method for determining leakage through imperfections in GMs of a composite liner system
June 1st, 2020
George R. Koerner This article describes a large-scale test method intended to determine the leakage through imperfections in a geomembrane (GM) under a given head. It can be used as a performance test to simulate field conditions where the GM is physically breached. The test method places a GM test specimen of 2 feet (0.6 […]
Geomembrane wrinkles: Your challenges and solutions
May 11th, 2020
Wrinkles are all too common when installing a new geomembrane. Small wrinkles can turn into cracks under pressure. That, in turn, can compromise the integrity of an entire geomembrane installation and cause a costly amount of damage. In this article, we take a closer look at why geomembrane wrinkles form and how you can avoid […]
IGS North America to host webinar on electrical leak location
April 28th, 2020
The Geosynthetic Institute (GSI) will sponsor a webinar, “IGS Electrical Leak Location Seminar Series Ep. 4,” on May 14, from 12:00 p.m. to 1 p.m. CDT. The webinar will explain ASTM D8265: The new standard practice for covered geomembrane testing. The aim of the newly published standard practice for covered geomembrane electrical leak location testing […]
GSI to host webinar on wave management with geomembranes
April 6th, 2020
The Geosynthetic Institute (GSI) will sponsor a webinar, “Wave (or Wrinkle) Management for Proper Deployment of Geomembranes,” on April 15, from 11:30 a.m. to 1 p.m. EST. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. An intrinsic property of all exposed geomembranes is […]
How does your geosynthetic react to changes in temperature?
April 1st, 2020
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
April 1st, 2020
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 […]
Coated fabrics for secondary containment applications
March 30th, 2020
The importance of environmental control In the U.S., dealing with environmentally hazardous liquids calls for conforming to the U.S. Environmental Protection Agency (EPA) rules, along with state and local requirements for secondary containment and under-dispenser containment. As part of your response plan in the event of a leak, contingencies are required for leak prevention and […]
AGRU introduces CleanSeam for geomembranes
February 12th, 2020
AGRU released CleanSeam, a new product configuration for AGRU geomembrane liners that integrates a protective release film on the weld edges of the geomembrane. CleanSeam eliminates or greatly reduces the potential for fine soils, waste materials, and stockpile dust from coming into contact with seaming areas during or prior to geosynthetics installation. The negative impacts […]
FGI to host webinar on floating cover systems
January 31st, 2020
The Fabricated Geomembrane Institute (GSI) will sponsor a webinar, “Floating Cover Systems for Reservoirs and Ponds,” on Feb. 27, at 4 p.m. CST. This webinar will discuss the different types of floating cover systems available for various reservoirs and ponds. In particular, this webinar will discuss the design, factory fabrication, installation, operation and maintenance of […]
ASTM International releases new standard for electrical leak location in geomembranes
September 25th, 2019
ASTM International has released a new standard, ASTM D8265-19 Standard Practices for Electrical Methods for Mapping Leaks in Installed Geomembranes. These practices describe standard procedures for using electrical methods to locate leaks in geomembranes covered with liquid or earthen materials, which can be watered to cause leakage through the geomembrane. For more information or to […]