Designation:D6931−12StandardTestMethodforIndirectTensile(IDT)StrengthofBituminousMixtures1ThisstandardisissuedunderthefixeddesignationD6931;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversproceduresforpreparingandtestinglaboratory-fabricatedorfield-recoveredcoresofbitu-minousmixturestodeterminetheIndirectTensile(IDT)Strength.1.2Thewithin-laboratoryrepeatabilitystandarddeviation,fortherecommendedrateofloading(50mm/min)andtesttemperature(25ºC),hasbeendeterminedtobe80kPafor101.6mmdiameterspecimens,basedon28labsusingeither2or4testreplicateswith11differentmixsamples.AdditionaldataisprovidedinTablefortheuser’sinformation.Thebetween-laboratoryreproducibilityofthistestmethodisbeingdeterminedandwillbeavailableonorbeforeAugust2012.Therefore,thistestmethodshouldnotbeusedforacceptanceorrejectionofmaterialsforpurchasingpurposes.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1074TestMethodforCompressiveStrengthofBitumi-nousMixturesD1561PracticeforPreparationofBituminousMixtureTestSpecimensbyMeansofCaliforniaKneadingCompactorD3387TestMethodforCompactionandShearPropertiesofBituminousMixturesbyMeansoftheU.S.CorpsofEngineersGyratoryTestingMachine(GTM)D3496PracticeforPreparationofBituminousMixtureSpecimensforDynamicModulusTesting(Withdrawn2010)3D3549TestMethodforThicknessorHeightofCompactedBituminousPavingMixtureSpecimensD3666SpecificationforMinimumRequirementsforAgen-ciesTestingandInspectingRoadandPavingMaterialsD4013PracticeforPreparationofTestSpecimensofBitu-...
