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How do you select geosynthetics for biogas containment systems?
July 27th, 2021
By Hermann Ng, Senior Technical Sales Manager, APAC FIGURE 1 Photograph courtesy of Solmax Biogas production from anaerobic waste stabilization ponds, typically used for treatment of wastewater from farms and industry, is a smart, sustainable, eco-responsible option. A key component of these systems is the geosynthetic material used for the sealing system. Why are polyethylene geomembranes a better choice and how do you select the right material? […]
CSPE: The “Benjamin Button” of polymeric liners
July 26th, 2021
CSPE-lined Palos Verde Reservoir in Los Angeles County, Calif. Photograph courtesy of Raven Engineered Films Most polymeric liners undergo oxidative aging immediately after installation, and this continues over time, ultimately leading to a reduction of their molecular chain length (this destructive process is referred to as oxidative degradation). In particular, high-density polyethylene (HDPE), linear low-density […]
Size and application suggestions for polyethylene liners
June 22nd, 2021
Ever since polymers were first conceived as a material in construction, engineers were already creating product variations to hone the physical properties to best fit the needs of a project. In fact, before the term geosynthetics was even coined, the material was being used in projects such as the Delta Works in the Netherlands and […]
What temperature can a polyethylene geomembrane resist?
June 8th, 2021
By Catrin Tarnowski, senior technical manager, Solmax Polyethylene (PE) geomembranes are used by engineers and regulators around the world to line landfills, ponds, mining heap leach pads and other applications. Prolonged exposure to highly elevated temperatures can make liners weaken rapidly. Specialized high-temperature liners can help resolve both these challenges. Prolonged exposure to highly elevated […]
AquaFuse and Owens Corning to produce lake liners
May 4th, 2021
AquaFuse by CMF Global Inc., a world leader in revolutionizing high-density polyethylene (HDPE) irrigation systems that improve golf course performance and water efficiency, announces that the company has entered into an agreement with Owens Corning, a global building and industrial materials leader, to produce liners for ponds and lakes primarily on golf courses. Based in […]
Solmax liners help secure 10-day build of Wuhan hospital
April 1st, 2021
Workers involved in the installation of the Solmax liner for the Huoshenshan Hospital in Wuhan, China. Photograph courtesy of Solmax In late January 2020, just before the Chinese Lunar New Year, the COVID-19 pandemic broke out in large areas of Wuhan, Hubei Province, China. The city went into lockdown on Jan. 23, 2020, with the […]
Planning a successful landfill liner installation
March 2nd, 2021
There are many regulations and requirements associated with landfill liner installations. For example, when planning the installation of a new municipal solid waste landfill (MSWLF), there are three important federal requirements that must be met: groundwater monitoring, closure and post-closure care, and financial assurance (EPA 2021). These requirements are in addition to state regulations that […]
The GMA Techline
February 1st, 2021
Moderated by George R. Koerner BIOLOGICAL DEGRADATION OF PE AND PP Q: Can you please enlighten me on the biological degradation of polyolefin polyethylene (PE) and polypropylene (PP)? A: Within the various plant forms of biological life, i.e., bacteria, actinomycetes, fungi and algae, polymer degradation is essentially nonexistent due to high molecular weight of the common […]
Methods to estimate pressures and strains in pond geomembrane bubbles
August 1st, 2020
By Richard Thiel, Hesham Eldesouky and Richard Brachman FIGURE 1 Bubbles in pond with 60-mil (1.5-mm) HDPE geomembrane on verge of bursting This article provides an update, validation and improved approach for predicting the shape, pressure and strains that can occur in an exposed geomembrane bubble (aka “whale”) created by gas trapped below the geomembrane […]
Geosynthetics are at the ready
August 1st, 2019
Geosynthetics play a varied and important role in infrastructure, from liners and covers for reservoirs to landfill covers. They can be found in highway construction and in coal ash impoundments. They are part of the basic framework of public and private construction, supporting modern expectations for transportation, sanitation and reliable energy. The American Society of […]