ASTM_D_5262_-_21.pdf

Designation:D526221Standard Test Method forDetermining the Unconfined Tension Creep and CreepRupture Behavior of Planar Geosynthetics Used forReinforcement Purposes1This standard is issued under the fixed designation D5262;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method is intended for use in determining theunconfined tension creep and creep rupture behavior of geo-synthetics at constant temperature when subjected to a sus-tained tensile loading.This test method is applicable to allgeosynthetics.1.2 The test method measures total elongation of the geo-synthetic test specimen,from the time of loading,while beingmaintained at a constant temperature.It includes proceduresfor measuring the tension creep and creep rupture behavior atconstant temperature of conditioned unconfined geosyntheticsas well as directions for calculating tension forces to plot creepand creep rupture curves.1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1776/D1776M Practice for Conditioning and Testing Tex-tilesD2990 Test Methods for Tensile,Compressive,and FlexuralCreep and Creep-Rupture of PlasticsD4354 Practice for Sampling of Geosynthetics and RolledErosion Control Products(RECPs)for TestingD4439 Terminology for GeosyntheticsD4595 Test Method for Tensile Properties of Geotextiles bythe Wide-Width Strip MethodD6637/D6637M Test Method for Determining Tensile Prop-erties of Geogrids by the Single or Multi-Rib TensileMethodE6 Terminology Relating to Methods of Mechanical Testing2.2 ISO Standard:3ISO/TR 20432 Guidelines for the Determination of theLong-Term Strength of Geosynthetics for Soil Reinforce-ment3.Terminology3.1 For definitions of many terms used in this test method,refer to Terminologies D123,D4439,and E6.4.Summary of Test Method4.1 The tension creep and creep rupture behavior of uncon-fined geosynthetics is measured by applying a sustained load inone step and measuring the total elongation of the testspecimen as a function of time while maintaining a specifiedtemperature and humidity.5.Significance and Use5.1 This test method is developed for use in the determina-tion of anticipated total elongation over time or time to rupturethat may occur in geosynthetics under sustained loadingconditions.5.1.1 The test data can be used in conjunction with inter-pretive methods to determine creep strain potential at designloads.1This test method is under the jurisdiction of ASTM Committee D35 onGeosynthetics and is the direct responsibility of Subcommittee D35.02 on Endur-ance Properties.Current edition approved Feb.15,2021.Published February 2021.Originallyapproved in 1992.Last previous edition approved in 2016 as D5262 07(2016).DOI:10.1520/D5262-21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standardss Document Summary page onthe ASTM website.3Available from International Organization for Standardization(ISO),ISOCentral Secretariat,Chemin de Blandonnet 8,CP 401,1214 Vernier,Geneva,Switzerland,https:/www.iso.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.15.1.2 The test data can be used in conjunction with inter-pretive methods to determine creep rupture potential at variousloads.5.2 This test method is not intended for routine acceptancetesting of geosynthetics.This test method should be used tocharacterize geosynthetics intended for use in reinforcementapplications in which creep or creep rupture is of concern.Theplane strain or rupture condition imposed during testing mustbe considered when using the tes