ASTM D6637/D6637M-15(2023)
(Test Method)Standard Test Method for Determining Tensile Properties of Geogrids by the Single or Multi-Rib Tensile Method
Standard Test Method for Determining Tensile Properties of Geogrids by the Single or Multi-Rib Tensile Method
SIGNIFICANCE AND USE
5.1 The determination of the tensile force-elongation values of geogrids provides index property values. This test method shall be used for quality control and acceptance testing of commercial shipments of geogrids.
5.2 In cases of dispute arising from differences in reported test results when using this test method for acceptance testing of commercial shipments, the purchaser and supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens which are as homogeneous as possible and which are from a lot of material of the type in question. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Student's t-test for unpaired data and an acceptable probability level chosen by the two parties before the testing began. If a bias is found, either its cause must be found and corrected or the purchaser and supplier must agree to interpret future test results in light of the known bias.
5.3 All geogrids can be tested by any of these methods. Some modification of techniques may be necessary for a given geogrid depending upon its physical makeup. Special adaptations may be necessary with strong geogrids, multiple layered geogrids, or geogrids that tend to slip in the clamps or those which tend to be damaged by the clamps.
SCOPE
1.1 This test method covers the determination of the tensile strength properties of geogrids by subjecting strips of varying width to tensile loading.
1.2 Three alternative procedures are provided to determine the tensile strength, as follows:
1.2.1 Method A—Testing a single geogrid rib in tension (N or lbf).
1.2.2 Method B—Testing multiple geogrid ribs in tension (kN/m or lbf/ft).
1.2.3 Method C—Testing multiple layers of multiple geogrid ribs in tension (kN/m or lbf/ft).
1.3 This test method is intended for quality control and conformance testing of geogrids.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D6637/D6637M − 15 (Reapproved 2023)
Standard Test Method for
Determining Tensile Properties of Geogrids by the Single or
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Multi-Rib Tensile Method
This standard is issued under the fixed designation D6637/D6637M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
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2.1 ASTM Standards:
1.1 This test method covers the determination of the tensile
D76/D76M Specification for Tensile Testing Machines for
strength properties of geogrids by subjecting strips of varying
Textiles
width to tensile loading.
D123 Terminology Relating to Textiles
1.2 Three alternative procedures are provided to determine
D4354 Practice for Sampling of Geosynthetics and Rolled
the tensile strength, as follows:
Erosion Control Products (RECPs) for Testing
D4439 Terminology for Geosynthetics
1.2.1 Method A—Testing a single geogrid rib in tension (N
D5262 Test Method for Determining the Unconfined Ten-
or lbf).
sion Creep and Creep Rupture Behavior of Planar Geo-
1.2.2 Method B—Testing multiple geogrid ribs in tension
synthetics Used for Reinforcement Purposes
(kN/m or lbf/ft).
1.2.3 Method C—Testing multiple layers of multiple
3. Terminology
geogrid ribs in tension (kN/m or lbf/ft).
3.1 Definitions:
1.3 This test method is intended for quality control and 3.1.1 atmosphere for testing geosynthetics, n—air main-
tained at a relative humidity of 50 to 70 % and a temperature
conformance testing of geogrids.
of 21 6 2 °C [70 6 4 °F].
1.4 The values stated in either SI units or inch-pound units
3.1.2 breaking force, (F), n—the force at failure.
are to be regarded separately as standard. The values stated in
3.1.3 corresponding force, n—synonym for force at speci-
each system are not necessarily exact equivalents; therefore, to
fied elongation.
ensure conformance with the standard, each system shall be
used independently of the other, and values from the two 3.1.4 force at specified elongation, FASE, n—a force asso-
ciated with a specific elongation on the force-elongation curve
systems shall not be combined.
(synonym for corresponding force).
1.5 This standard does not purport to address all of the
3.1.5 force-elongation curve, n—in a tensile test, a graphical
safety concerns, if any, associated with its use. It is the
representation of the relationship between the magnitude of an
responsibility of the user of this standard to establish appro-
externally applied force and the change in length of the
priate safety, health, and environmental practices and deter-
specimen in the direction of the applied force (synonym for
mine the applicability of regulatory limitations prior to use.
stress-strain curve).
1.6 This international standard was developed in accor-
3.1.6 geogrid, n—a geosynthetic formed by a regular net-
dance with internationally recognized principles on standard-
work of integrally connected elements with apertures greater
ization established in the Decision on Principles for the
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than 6.35 mm [ ⁄4 in.] to allow interlocking with surrounding
Development of International Standards, Guides and Recom-
soil, rock, earth, and other surrounding materials to primarily
mendations issued by the World Trade Organization Technical
function as reinforcement. D5262
Barriers to Trade (TBT) Committee.
3.1.7 geosynthetic, n—a product manufactured from poly-
meric material used with soil, rock, earth, or other geotechnical
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This test method is under the jurisdiction of ASTM Committee D35 on
Geosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechani-
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cal Properties. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 15, 2023. Published November 2023. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2001. Last previous edition approved in 2015 as D6637/D6637M – 15. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/D6637_D6637M-15R23. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D6637/D6637M − 15 (2023)
engineering related material as an integral part of a man-made shall be used for quality control and acceptance testing of
project, structure, or system. commercial shipments of geogrids.
3.1.8 index test, n—a test procedure which may contain
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