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New Method Tests Tensile Strength of Geosynthetic Clay Liners

The tensile strength of manufactured geosynthetic clay liners must be checked to verify the condition of carrier components and the tensile properties of finished products.

ASTM D 6768, Standard Test Method for Tensile Strength of Geosynthetic Clay Liners, makes testing easier by employing the same grips used in common tests for geosynthetic clay liners, not those used for the “grab method.” Users of the ASTM method can also expect more precise test results, says Robert Mackey, P.E., senior design engineer, S2L, Inc., Maitland, Fla.

“ASTM D 6768 is an improved method that utilizes the same test grips as ASTM D 6496 (GCL Peel Test),” says Mackey, who led the standard’s development. “The additional benefit of this test method is that it allows the user to test several properties without changing the grips, thereby saving time.”

Design engineers, manufacturers, test labs, users, and academics under ASTM Committee D35 on Geosynthetics developed the new method to bolster liner manufacturing and quality control processes.

The committee welcomes participation from all stakeholders as it develops standards for geosynthetic materials.

For further technical information, contact Robert E. Mackey, P.E., S2L, Inc., Maitland, Fla. (phone: 407/475-9163). Committee D35 meets Jan. 16-18 in Albuquerque. For meeting or membership details, contact Maxine Topping, manager, Technical Committee Operations, ASTM International (phone: 610/832-9737). //

Copyright 2002, ASTM