ASTM D6637-10
(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
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.
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.
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 make-up. 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 SI units are to be regarded as the standard. The inch-pound values stated in parentheses are provided for information only.
1.5 This standard may involve hazardous materials, operations, and equipment. 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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Designation:D6637–10
Standard Test Method for
Determining Tensile Properties of Geogrids by the Single or
1
Multi-Rib Tensile Method
This standard is issued under the fixed designation D6637; 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 D5262 Test Method for Evaluating the Unconfined Tension
Creep and Creep Rupture Behavior of Geosynthetics
1.1 This test method covers the determination of the tensile
strength properties of geogrids by subjecting strips of varying
3. Terminology
width to tensile loading.
3.1 Definitions:
1.2 Three alternative procedures are provided to determine
3.1.1 atmosphere for testing geosynthetics, n—air main-
the tensile strength, as follows:
tained at a relative humidity of 50 to 70 % and a temperature
1.2.1 Method A—Testing a single geogrid rib in tension (N
of 21 6 2°C (70 6 4°F).
or lbf).
3.1.2 breaking force, (F), n—the force at failure.
1.2.2 Method B—Testing multiple geogrid ribs in tension
3.1.3 corresponding force, n—synonym for force at speci-
(kN/m or lbf/ft).
fied elongation.
1.2.3 Method C—Testing multiple layers of multiple
3.1.4 force at specified elongation, FASE, n—a force asso-
geogrid ribs in tension (kN/m or lbf/ft).
ciated with a specific elongation on the force-elongation curve
1.3 This test method is intended for quality control and
(synonym for corresponding force.)
conformance testing of geogrids.
3.1.5 force-elongation curve, n—in a tensile test, a graphi-
1.4 The values stated in SI units are to be regarded as the
cal representation of the relationship between the magnitude of
standard. The inch-pound values stated in parentheses are
an externally applied force and the change in length of the
provided for information only.
specimen in the direction of the applied force (synonym for
1.5 This standard may involve hazardous materials, opera-
stress-strain curve.)
tions, and equipment. This standard does not purport to
3.1.6 geogrid, n—a geosynthetic formed by a regular net-
address all of the safety concerns, if any, associated with its
work of integrally connected elements with aperetures greater
use. It is the responsibility of the user of this standard to
1
than 6.35 mm ( ⁄4 in.) to allow interlocking with surrounding
establish appropriate safety and health practices and deter-
soil, rock, earth, and other surrounding materials to primarily
mine the applicability of regulatory limitations prior to use.
function as reinforcement. D5262
2. Referenced Documents 3.1.7 geosynthetic, n—a product manufactured from poly-
2 meric material used with soil, rock, earth, or other geotechnical
2.1 ASTM Standards:
engineering related material as an integral part of a man made
D76 Specification for Tensile Testing Machines for Textiles
project, structure, or system.
D123 Terminology Relating to Textiles
3.1.8 index test, n—a test procedure which may contain
D1909 StandardTable of Commercial Moisture Regains for
known bias, but which may be used to establish an order for a
Textile Fibers
set of specimens with respect to the property of interest.
D4354 Practice for Sampling of Geosynthetics for Testing
3.1.9 integral, adj—in geosynthetics, forming a necessary
D4439 Terminology for Geosynthetics
part of the whole; a constituent.
3.1.10 junction, n—the point where geogrid ribs are inter-
1
This test method is under the jurisdiction of ASTM Committee D35 on
connected to provide structure and dimensional stability.
Geosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechani-
3.1.11 rib, n—for geogrids, the continuous elements of a
cal Properties.
geogrid which are either in the machine or cross-machine
Current edition approved March 1, 2010. Published April 2010. Originally
approved in 2001. Last previous edition approved in 2009 as D6637–01(2009).
direction as manufactured.
DOI: 10.1520/D6637-10.
3.1.12 rupture, n—for geogrids, the breaking or tearing
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
apart of ribs.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D6637–10
3.1.13 tensile, adj—capable of tensions, or relating to ten- cause must be found and corrected or the purchaser and
sion of a material. supplier must agree to interpret future test results in light of the
3.1.14 tensile strength, (a ), n—for geogrids the ma
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D6637–01 (Reapproved 2009) Designation:D6637–10
Standard Test Method for
Determining Tensile Properties of Geogrids by the Single or
1
Multi-Rib Tensile Method
This standard is issued under the fixed designation D6637; 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
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 SI units are to be regarded as the standard. The inch-pound values stated in parentheses are provided
for information only.
1.5 This standard may involve hazardous materials, operations, and equipment. 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D76 Specification for Tensile Testing Machines for Textiles
D123 Terminology Relating to Textiles
D1909 Standard Table of Commercial Moisture Regains for Textile Fibers
D4354 Practice for Sampling of Geosynthetics for Testing
D4439 Terminology for Geosynthetics
D5262 Test Method for Evaluating the Unconfined Tension Creep and Creep Rupture Behavior of Geosynthetics
3. Terminology
3.1 Definitions:
3.1.1 atmosphere for testing geosynthetics, n—air maintained at a relative humidity of 50 to 70 % and a temperature of 21 6
2°C (70 6 4°F).
3.1.2 breaking force, (F), n—the force at failure.
3.1.3 corresponding force, n—synonym for force at specified elongation.
3.1.4 force at specified elongation, FASE, n—a force associated with a specific elongation on the force-elongation curve.curve
(synonym for corresponding force.)
3.1.5 force-elongation curve, n—in a tensile test, a graphical representation of the relationship between the magnitude of an
externally applied force and the change in length of the specimen in the direction of the applied force.force (synonym for
stress-strain curve.)
3.1.6 geogrid, n—ageosyntheticformedbyaregularnetworkofintegrallyconnectedelementswithapereturesgreaterthan6.35
1
mm ( ⁄4 inch)in.) to allow interlocking with surrounding soil, rock, earth, and other surrounding materials to primarily function as
reinforcement. (D5262 )
3.1.7 integral, adj—in geosynthetics, forming a necessary part of the whole; a constituent.
1
This test method is under the jurisdiction ofASTM Committee D35 on Geosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechanical Properties.
Current edition approved June 1, 2009. Published July 2009. Originally approved in 2001. Last previous edition approved in 2001 as D6637 – 01. DOI:
10.1520/D6637-01R09.
Current edition approved March 1, 2010. Published April 2010. Originally approved in 2001. Last previous edition approved in 2009 as D6637–01(2009). DOI:
10.1520/D6637-10.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D6637–10
3.1.8geosynthetic, n—a product manufactured from polymeric material used with soil, rock, earth, or other geotechnical
engineering related material as an integral part of a man made project, structure, or system.
3.1.93.1.8 index test, n—a test procedure which may contain known bias, but which may be used to establish an order for a set
of specimens with respect to the property of interest.
3.1.9 integral, adj—in geosynthetics, forming a necessary part of the whole; a constituent.
3.1.10 junction, n—
...
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