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Standard Acceptance Testing Requirements Available for Geosynthetic Clay Liners

Standard Guide D 6495 for Acceptance Testing Requirements for Geosynthetic Clay Liners provides guidelines on the acceptance testing requirements for geosynthetic clay liner (GCL) materials used to contain waste and water.

Developed by a task group of manufacturers, geotechnical testing laboratories, regulating agencies, and GCL designers in Subcommittee D35.04 on Geosynthetic Clay Liners in Committee D35 on Geosynthetics, the guide suggests various ASTM test methods for a variety of GCL material factors, such as:

--Swell index;
--Fluid loss;
--Grab tensile strength;
--Index flux;
--Tensile strength, thickness, and density of geomembrane support and backing; and
--Direct shear tests or peel strength tests (for needlepunched GCLs).

“The new ASTM D 6495 will enhance the user’s ability to specify GCLs with confidence that the testing regime adequately addresses the needs of the project,” says task group chairman Kent von Maubeuge, director of Product Marketing, Naue Fasertechnik GmbH & Co., Luebbecke, Germany. “The guideline provides for the most appropriate tests to be conducted to ensure containment is maximized in liquid as well as solid waste projects.”

Recommended verifications for compliance with acceptable material specifications are provided.

For further technical information, contact Kent von Maubeuge, Director of Product Marketing, Naue Fasertechnik GmbH & Co. KG, Wartturmstr. 1, 32312 Luebbecke (+49-5741-4008-28; fax.: -84). Committee D35 meets June 21-23 in Toronto, Ontario, Canada. For meeting or membership details, contact manager Pat Picariello, ASTM (610/832-9720). //

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