ASTM D 4885 Standard Test Method for Determining Performance Strength of Geomembranes by the Wide Strip Tensile Method
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ASTM D 4885 Document Information:
Title
Standard Test Method for Determining Performance Strength of Geomembranes by the Wide Strip Tensile Method
ASTM International
Publication Date:
Jul 10, 2001
Scope:
This test method covers the determination of the performance strength of synthetic geomembranes by subjecting wide strips of material to tensile loading.
This test method covers the measurement of tensile strength and elongation of geomembranes and includes directions for calculating initial modulus, offset modulus, secant modulus, and breaking toughness.
The basic distinctions between this test method and other methods measuring tensile strength of geomembranes are the width of the specimens tested and the speed of applied force. The greater width of the specimens specified in this test method minimizes the contraction edge effect (necking) which occurs in many geosynthetics and provides a closer relationship to actual material behavior in service. The slower speed of applied strain also provides a closer relationship to actual material behavior in service.
As a performance test, this method will be used relatively infrequently, and to test large lots of material. This test method is not intended for routine quality control testing of geomembranes.
The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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