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.
Part 3: Dynamic strength.
For groundwater protection, site remediation, hydraulic engineering.
Geosynthetics for mining waste rock and tailings.
Equipment and procedures for GCL static shear strength measurement.
Equipment and procedures for GCL shear strength measurement.
A reader needs some assistance in comparing two geosynthetic clay liners for a project.
A reader is designing a surface impoundment with interior side slopes of 1.5H:1V.
NAUE GmbH & Co. has opened a new geosynthetic clay liner production center in Malaysia.
Hiring experts to accomplish specialty work is a key for success in this type of venture.
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.
GCLs are hydraulically equivalent to low permeability soil liner in terms of advective flow.
Heat can have many detrimental effects on a Subtitle D composite liner system.
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.
The product combines the benefits of its needlepunched GCLs with the pricing of its adhesive GCLs, according to a company press release.
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.
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.