The durability of exposed geomembrane covers

October 1, 2017

The most frequently asked question by people in the geosynthetics world is how long is the anticipated lifetime of geosynthetics. So much so that of the more than 3,000 questions submitted to the GMA Techline since it began in 2004, 591 (19.7%) have been on lifetime, aka durability. Of these, 49% were on buried lifetime, …

GMA Techline

Welding HDPE to PVC and more Q: I would appreciate any input you have on these questions: Can a high-density polyethylene (HDPE) geomembrane (GM) be welded to a PVC geomembrane? I am looking to connect a geomembrane to a building foundation. Based on some research, I have found the following options: bolt the geomembrane to …

Geosynthetic Institute news: Mega waterbags

According to the United Nations (UN), 1.1 billion people in 34 countries have inadequate access to safe drinking water. Furthermore, pollution, global warming and population growth will have continuing negative impacts on the availability of safe drinking water. By the year 2040, the UN estimates that more than 2 billion people in 60 countries will …

Geosynthetic Institute News

August 1, 2017

Commentary on geosynthetic specifications One can only suspect that the first specification on a given manufactured material came along with or very shortly after the first manufactured product became available. It follows then that some 200 years later, manufactured geosynthetic materials should do likewise. In fact, so-called standards organizations have evolved by publishing the following …

Geosynthetics Institute News

June 1, 2017

Robert M. Koerner on his namesake award and lecture series On March 14, 2017, at the Geotechnical Frontiers conference in Orlando, Fla., George Koerner graciously accepted the Robert M. Koerner Award and Lecture Series. The biennial award and lecture series were established by the Geosynthetic Materials Association (GMA) Executive Council; Koerner was the first recipient. …

MSE wall failures vis-à-vis the lack of filtration design

April 1, 2017

Since 2001, the Geosynthetic Institute (GSI) has been accumulating data on failures of geosynthetic-reinforced mechanically stabilized earth (MSE) retaining walls. We currently have 301 cases, with 191 (63%) caused in whole or part by water in, or adjacent to, the reinforced soil zone. We sincerely hope that our past writings and webinars are helping to …

New geotextiles book launched in 2016

August 1, 2016

Introduction A hefty new addition to civil engineering and geosynthetics libraries around the world was unveiled earlier this year. Geotextiles: From Design to Applications debuted in March 2016. Number 175 from the U.K.-based Textile Institute/Woodhead Publishing Series in Textiles, the 640-page book contains 26 chapters by 35 authors, including many of the most-renowned and well-known …

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Traditional vs. exposed geomembrane landfill covers

October 1, 2012

The articles in this series encompass all types of geosynthetics and their applications viewed from the context of sustainability. Traditional solutions are compared with geosynthetic solutions from both cost and carbon footprint perspectives. (from the Geosynthetic Research Institute’s 24th conference, 2011) Cost and sustainability perspectives Abstract All municipal solid waste (MSW) landfills require a final …