Designation:D7556−10StandardTestMethodsforDeterminingSmall-StrainTensilePropertiesofGeogridsandGeotextilesbyIn-AirCyclicTensionTests1ThisstandardisissuedunderthefixeddesignationD7556;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodscoverthedeterminationofsmall-straintensilepropertiesofgeogridsandgeotextilesbysubject-ingwide-widthspecimenstocyclictensileloading.1.2Thesetestmethods(A,B,andC)allowforthedeter-minationofsmall-straincyclictensilemodulusbythemea-surementofcyclictensileloadandelongation.1.3Thistestmethodisintendedtoprovidepropertiesfordesign.Thetestmethodwasdevelopedformechanistic-empiricalpavementdesignmethodsrequiringinputofthereinforcementtensilemodulus.Theuseofcyclicmodulusfromthistestmethodforotherapplicationsinvolvingcyclicloadingshouldbeevaluatedonacase-by-casebasis.1.4Threetestmethods(A,B,andC)areprovidedtodeterminesmall-straincyclictensilemodulusongeogridsandgeotextiles.1.4.1TestMethodA—TestingarelativelywidespecimenofgeogridincyclictensioninkN/m(lbf/ft).1.4.2TestMethodB—TestingmultiplelayersofarelativelywidespecimenofgeogridincyclictensioninkN/m(lbf/ft).1.4.3TestMethodC—TestingarelativelywidespecimenofgeotextileincyclictensioninkN/m(lbf/ft).1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareprovidedforinformationonlyandarenotconsideredstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D76SpecificationforTensileTestingMachinesforTextilesD123TerminologyRelatingtoTextilesD579SpecificationforGreigeWovenGlassFabricsD4354PracticeforSamplingofGeosynthe...
