Membrane seams addressed in new ASTM standard

Geosynthetics | February 2007

The increased use of geomembranes as barrier materials to restrict liquid migration created a need for a test method to evaluate the quality of geomembrane seams produced by tape methods.

ASTM International Committee D35 on Geosynthetics has met this need with the approval of the new standard D 7272, Test Method for Determining the Integrity of Seams Used in Joining Geomembranes by Pre-manufactured Taped Methods. The standard is under the jurisdiction of Subcommittee D35.10 on Geomembranes.

Jeff PanKonie, senior sales engineer for Firestone Specialty Products, noted that the new Test Method D 7272 more accurately addresses the unique characteristics of taped seams. He added that D 7272 will become a reference for engineers designing projects with taped seams, as well as for contractors who can use the standard for field testing.

Test Method D 7272 was developed to be used with most taped seams, whether the membrane is reinforced or nonreinforced. The standard also has allowances for seam width, since seams can vary greatly with taped products dependent on the manufacturer and the types of membrane and taped seam.

Interested parties are invited to participate in the standards developing activities of Subcommittee D35.10. ASTM International standards are available for purchase from Customer Service (phone: 610/832-9585; service@astm.org) or at www.astm.org.

For further technical information, contact Jeff PanKonie, Firestone Specialty Products, Indianapolis, Ind. (phone: 317/575-7238; PankonieJeff@firestonesp.com).

Committee D35 meets Jan. 31-Feb. 2, 2007, at the January Committee Week in Costa Mesa, Calif. For membership or meeting information, contact Christine Sierk, manager, Technical Committee Operations, ASTM International (phone: 610-832-9728; E-mail: csierk@astm.org).

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