Geosynthetic clay liners

Bonding clay to geosynthetic materials has created an economical, long-term solution for many applications.

GCLs are used primarily as substitutes for compacted clay liners (CCLs), providing significant advantages in cost, ease of installation, and performance. Primary applications include surface impoundment, secondary containment and landfills.

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  • Design strength for GCLs

    If the GCL is not encapsulated between two geomembranes, the slope design should/must assume that the GCL will be fully hydrated at a low normal stress.

    June 1, 2009

  • GCLs and hydraulic equivalence

    GCLs are hydraulically equivalent to low permeability soil liner in terms of advective flow.

    June 1, 2009

  • The effects of heat on Subtitle D composite liner systems

    Heat can have many detrimental effects on a Subtitle D composite liner system.

    June 1, 2009
  • Figure 1 | GCL sample before test cycles.

    GCL shrinkage: A possible solution

    A potential industry-wide concern for GCL shrinkage was identified by Thiel and Richardson (2005) at the January 2005 Geo-Frontiers conference in Austin, Texas, based on observed problems at several sites worldwide.

    February 1, 2009

  • CETCO introduces new geosynthetic clay liner product

    The product combines the benefits of its needlepunched GCLs with the pricing of its adhesive GCLs, according to a company press release.

    October 1, 2008

  • GCLs and slope stability

    Of course, there are ongoing tests on GCLs constantly, but the focus is on the upper and lower interface shear tests and somewhat less with respect to internal shear strengths.

    April 1, 2008

  • Geomembrane thickness

    Regarding HDPE geomembranes, the minimum thickness required by the U.S. Environmental Protection Agency is 1.5mm.

    April 1, 2008
  • Figure 1 | Aerial view of the abandoned Kam Kotia Mine site prior to implementation of a multi-stage rehabilitation program. Figure courtesy of Patrick Jolicoeur, Hazco.

    Geocomposite cover for sulfide tailings

    In autumn 2006, the Ontario Ministry of Northern Development and Mines tendered a construction project to provide a soil cover over the North Impounded Tailings (NIT) area at the abandoned Kam Kotia Mine site in east-central Ontario, Canada.

    February 1, 2008

  • Background and most recent GRI standards

    In the 1980s, while supervising graduate research students in their geosynthetics theses topics, the issue of writing generic and standardized procedures arose in this (quite new at the time) geosynthetics field.

    August 1, 2007
  • Table 1

    Use of geosynthetics in the mining and mineral processing industry

    This article gives a brief overview and a summary of the results of research work conducted under the 2003 North American Geosynthetics (NAGS) Award of Merit.

    August 1, 2007
  • Prepared grouted riprap surface and deployed 22-oz/yd2 cushion geotextile (with geocomposite patches in foreground). Photo courtesy of URS.

    Using geosynthetics to rehabilitate Fisher Cañon Dam and Reservoir

    Installation of a reservoir liner restored more-efficient irrigation to a Colorado resort.

    August 1, 2007

  • Geosynthetic clay liners

    Bonding clay to geosynthetic materials has created an economical, long-term solution for many applications.

  • Page 1 of 1

  • Geosynthetics overview

    Sponsored by Geosynthetic Materials Association

    Geosynthetics are a family of civil engineering materials. Their use has expanded rapidly into nearly all areas of civil, geotechnical, environmental, coastal and hydraulic construction. Many durable polymers (plastics) common to everyday life are found in geosynthetics. The most common are polyolefins and polyester, although rubber, fiberglass and natural materials are sometimes used. However, more that 90% of geosynthetics are made of polypropylene.

    Since their introduction in the late 1960s, geosynthetics have proven to be versatile and cost-effective ground modification materials. Geosynthetics also have become essential elements as barriers in environmental and hydraulic applications.

    There are more that 40 manufacturers of geosynthetics that provide products for the North American marketplace. More than half of the manufacturers are located in the southeastern U.S. or Texas. The industry provides more than 12,000 jobs in the U.S. in manufacturing, fabrication, distribution and installation.

    GMA has conducted a market survey since 1996. Survey participation has been open to manufacturing members of the association who report product shipped. The majority of geosynthetic manufacturers participate in the survey.

    In 2008, a panel knowledgeable of the market analyzed the GMA data collected. This panel developed the GMA Geosynthetics Market Report by adding to it an estimation of product produced by manufacturers that had not reported in the GMA market survey. The result is the GMA Geosynthetics Market Report-the most comprehensive and accurate measure of the geosynthetic market in the U.S. and Canada.

    Learn more and purchase this report at GMA Geosynthetics Market Report.