ASTM D5262-21

Standard Test Method for Determining the Unconfined Tension Creep and Creep Rupture Behavior of Planar Geosynthetics Used for Reinforcement Purposes

SIGNIFICANCE AND USE
5.1 This test method is developed for use in the determination of anticipated total elongation over time or time to rupture that may occur in geosynthetics under sustained loading conditions.  
5.1.1 The test data can be used in conjunction with interpretive methods to determine creep strain potential at design loads.  
5.1.2 The test data can be used in conjunction with interpretive methods to determine creep rupture potential at various loads.  
5.2 This test method is not intended for routine acceptance testing of geosynthetics. This test method should be used to characterize geosynthetics intended for use in reinforcement applications in which creep or creep rupture is of concern. The plane strain or rupture condition imposed during testing must be considered when using the test results for design.  
5.3 The basic distinctions between this test method and other test methods for measuring tension creep and creep rupture behavior are: (1) the width of the specimens (Section 8), and (2) the measurement of total elongation over time or time to rupture from the moment of specimen loading. The greater widths of the specimens specified in this test method minimize the contraction edge effect (necking) that occurs in many geosynthetic materials and provides a closer relationship to actual material behavior in plane strain tension conditions.  
5.4 The creep or stress rupture of a given geosynthetic is likely to be reduced in soil because of confining stresses and load transfer to the soil. The unconfined environment represents a controlled test in which the results are conservative with regard to the behavior of the material in service. Confined or in-soil testing may model the field behavior of the geosynthetic more accurately.
SCOPE
1.1 This test method is intended for use in determining the unconfined tension creep and creep rupture behavior of geosynthetics at constant temperature when subjected to a sustained tensile loading. This test method is applicable to all geosynthetics.  
1.2 The test method measures total elongation of the geosynthetic test specimen, from the time of loading, while being maintained at a constant temperature. It includes procedures for measuring the tension creep and creep rupture behavior at constant temperature of conditioned unconfined geosynthetics as well as directions for calculating tension forces to plot creep and creep rupture curves.  
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.4 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.  
1.5 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

• Status: Published
• Publication Date: 14-Feb-2021
• ICS: 59.080.70 - Geotextiles
• Technical Committee: D35 - Geosynthetics
• Drafting Committee: D35.02 - Endurance Properties

Relations

• Refers: ASTM D1776/D1776M-20 - Standard Practice for Conditioning and Testing Textiles
• Effective Date: 01-Feb-2020
• Refers: ASTM D4354-12(2020) - Standard Practice for Sampling of Geosynthetics and Rolled Erosion Control Products (RECPs) for Testing
• Effective Date: 01-May-2020

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:D5262 −21
Standard Test Method for
Determining the Unconfined Tension Creep and Creep
Rupture Behavior of Planar Geosynthetics Used for
1
Reinforcement Purposes
This standard is issued under the fixed designation D5262; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D1776/D1776MPractice for Conditioning and Testing Tex-
tiles
1.1 This test method is intended for use in determining the
D2990Test Methods forTensile, Compressive, and Flexural
unconfined tension creep and creep rupture behavior of geo-
Creep and Creep-Rupture of Plastics
synthetics at constant temperature when subjected to a sus-
D4354Practice for Sampling of Geosynthetics and Rolled
tained tensile loading. This test method is applicable to all
Erosion Control Products (RECPs) for Testing
geosynthetics.
D4439Terminology for Geosynthetics
1.2 The test method measures total elongation of the geo-
D4595Test Method for Tensile Properties of Geotextiles by
synthetic test specimen, from the time of loading, while being
the Wide-Width Strip Method
maintained at a constant temperature. It includes procedures
D6637/D6637MTest Method for DeterminingTensile Prop-
for measuring the tension creep and creep rupture behavior at
erties of Geogrids by the Single or Multi-Rib Tensile
constant temperature of conditioned unconfined geosynthetics
Method
aswellasdirectionsforcalculatingtensionforcestoplotcreep
E6Terminology Relating to Methods of MechanicalTesting
and creep rupture curves. 3
2.2 ISO Standard:
1.3 The values stated in SI units are to be regarded as the ISO/TR 20432Guidelines for the Determination of the
standard. The values given in parentheses are for information Long-Term Strength of Geosynthetics for Soil Reinforce-
only. ment
1.4 This standard does not purport to address all of the
3. Terminology
safety concerns, if any, associated with its use. It is the
3.1 For definitions of many terms used in this test method,
responsibility of the user of this standard to establish appro-
refer to Terminologies D123, D4439, and E6.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
4. Summary of Test Method
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard- 4.1 The tension creep and creep rupture behavior of uncon-
ization established in the Decision on Principles for the finedgeosyntheticsismeasuredbyapplyingasustainedloadin
Development of International Standards, Guides and Recom- one step and measuring the total elongation of the test
mendations issued by the World Trade Organization Technical specimen as a function of time while maintaining a specified
Barriers to Trade (TBT) Committee. temperature and humidity.
2. Referenced Documents
5. Significance and Use
2
2.1 ASTM Standards:
5.1 This test method is developed for use in the determina-
D123Terminology Relating to Textiles
tionofanticipatedtotalelongationovertimeortimetorupture
that may occur in geosynthetics under sustained loading
1
conditions.
This test method is under the jurisdiction of ASTM Committee D35 on
Geosynthetics and is the direct responsibility of Subcommittee D35.02 on Endur-
5.1.1 The test data can be used in conjunction with inter-
ance Properties.
pretive methods to determine creep strain potential at design
Current edition approved Feb. 15, 2021. Published February 2021. Originally
loads.
approved in 1992. Last previous edition approved in 2016 as D5262–07 (2016).
DOI: 10.1520/D5262-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from International Organization for Standardization (ISO), ISO
Standardsvolumeinformation,refertothestandards’sDocumentSummarypageon Central Secretariat, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva,
the ASTM website. Switzerland, https://www.iso.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D5262−21
5.1.2 The test data can be used in conjunction with inter- weights, weights and fulcrums, hydraulics, or pneumatics.The
pretivemethodstodeterminecreeprupturepotentialatvarious loadingmechanismmustpermitreproduciblyrapidandsmooth
loads. loading, as specified in 11.5. No dynamic forces on placem
...

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: D5262 − 07 (Reapproved 2016) D5262 − 21
Standard Test Method for
EvaluatingDetermining the Unconfined Tension Creep and
Creep Rupture Behavior of GeosyntheticsPlanar
1
Geosynthetics Used for Reinforcement Purposes
This standard is issued under the fixed designation D5262; 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 is intended for use in determining the unconfined tension creep and creep rupture behavior of geosynthetics
at constant temperature when subjected to a sustained tensile loading. This test method is applicable to all geosynthetics.
1.2 The test method measures total elongation of the geosynthetic test specimen, from the time of loading, while being maintained
at a constant temperature. It includes procedures for measuring the tension creep and creep rupture behavior at constant
temperature of conditioned unconfined geosynthetics as well as directions for calculating tension forces to plot creep and creep
rupture curves.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D123 Terminology Relating to Textiles
D1776D1776/D1776M Practice for Conditioning and Testing Textiles
D2990 Test Methods for Tensile, Compressive, and Flexural Creep and Creep-Rupture of Plastics
D4354 Practice for Sampling of Geosynthetics and Rolled Erosion Control Products (RECPs) for Testing
D4439 Terminology for Geosynthetics
D4491 Test Methods for Water Permeability of Geotextiles by Permittivity
D4595 Test Method for Tensile Properties of Geotextiles by the Wide-Width Strip Method
D6637D6637/D6637M Test Method for Determining Tensile Properties of Geogrids by the Single or Multi-Rib Tensile Method
E6 Terminology Relating to Methods of Mechanical Testing
1
This test method is under the jurisdiction of ASTM Committee D35 on Geosynthetics and is the direct responsibility of Subcommittee D35.02 on Endurance Properties.
Current edition approved June 1, 2016Feb. 15, 2021. Published June 2016February 2021. Originally approved in 1992. Last previous edition approved in 20122016 as
D5262 – 07 (2016).(2012). DOI: 10.1520/D5262-07R16.10.1520/D5262-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standards’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 ----------------------
D5262 − 21
3
2.2 ISO Standard:
ISO/TR 20432 Guidelines for the Determination of the Long-Term Strength of Geosynthetics for Soil Reinforcement
3. Terminology
3.1 Definitions—For definitions of many terms used in this test method, refer to Terminologies D123, D4439 and E6.
3.1 For definitions of many terms used in this test method, refer to Terminologies D123, D4439, and E6.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 atmosphere for testing geosynthetics, n—air maintained at a relative humidity between 50 and 70 % and the test (Section
10.2).
3.2.2 creep, n—the time-dependent increase in accumulative strain in a material resulting from an applied constant force.
3.2.3 design load, n—the load at which the geosynthetic is required to operate in order to perform its intended function.
3.2.4 failure, n—an arbitrary point at which a material ceases to be functionally capable of its intended use.
3.2.5 geogrid, n—a geosynthetic formed by a regular network of integrally connected elements with apert
...