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【英文标准名称】:StandardTestMethodforDeterminingFractureEnergyofAsphalt-AggregateMixturesUsingtheDisk-ShapedCompactTensionGeometry
【原文标准名称】:用盘状紧凑拉伸几何物测定地沥青集料混合物断裂强度的标准试验方法
【标准号】:ASTMD7313-2007a
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D04.26
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:集料;地沥青;施工材料;测定;圆盘;能量;断裂;几何;混合物;道路建筑;抗拉荷载;测试
【英文主题词】:asphaltconcrete;crackgrowth;cracking;crackmouthopeningdisplacement;disk-shapedcompacttensiontest;fractureenergy;temperaturetest;Aggregate(pavementsurfaces);Cracking;Fracture
【摘要】:Thetestmethodwasdevelopedfordeterminingthefractureresistanceofasphalt-aggregatemixtures.Thefractureresistancecanhelpdifferentiatemixtureswhoseservicelifemightbecompromisedbycracking.Thetestmethodisgenerallyvalidforspecimensthataretestedattemperaturesof10x00B0;C(50x00B0;F)orbelow(seeNote1).Thespecimengeometryisreadilyadaptedto150-mmdiameterspecimens,suchasfabricatedfromSuperpave(trademark)gyratorycompactors(TestMethodD6925),thatareusedfortheasphaltconcretedesignprocess.Thespecimengeometrycanalsobeadaptedforforensicinvestigationsusingfieldcoresofpavementswherethinliftsarepresent.Thisgeometryhasbeenfoundtoproducesatisfactoryresultsforasphaltmixtureswithnominalmaximumaggregatessizerangingfrom4.75to19mm.Note18212;Thestiffnessoftheasphaltbindertendstoinfluencetheassessmentofavalidtestasdescribedin7.4.Forinstanceasoftasphaltbinder,whichmayberequiredforaverycoldclimatemightnotleadtoamixturethatwouldproducevalidresultsat10x00B0;Candconversely,ahardasphaltbinderutilizedinhotclimatesmayrequirehighertemperaturestoprovideanymeaningfulinformation.Note28212;Thequalityoftheresultsproducedbythistestmethodaredependentonthecompetenceofthepersonnelperformingtheprocedureandthecapability,calibration,andmaintenanceoftheequipmentused.AgenciesthatmeetthecriteriaofSpecificationD3666aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthistestmethodarecautionedthatcompliancewithSpecificationD3666alonedoesnotcompletelyassurereliableresults.Reliableresultsmaydependonmanyfactors;followingthesuggestionsofSpecificationD3666orsomesimilaracceptableguidelinesprovidesameansofevaluatingandcontrollingsomeofthosefactors.1.1Thistestmethodcoversthedeterminationoffractureenergy(Gf)ofasphalt-aggregatemixturesusingthedisk-shapedcompacttensiongeometry.Thedisk-shapedcompacttensiongeometryisacircularspecimenwithasingleedgenotchloadedintension.Thefractureenergycanbeutilizedasaparametertodescribethefractureresistanceofasphaltconcrete.Thefractureenergyparameterisparticularlyusefulintheevaluationofmixtureswithductilebinders,suchaspolymer-modifiedasphaltconcrete,andhasbeenshowntodiscriminatebetweenthesematerialsmorebroadlythantheindirecttensilestrengthparameter(AASHTOT322,Wagoner).Thetestisgenerallyvalidattemperaturesof10x00B0;C(50x00B0;F)andbelow,orformaterialandtemperaturecombinationswhichproducevalidmaterialfracture,asoutlinedin7.4.1.2Thespecimengeometryandterminology(disk-shapedcompacttension,DC(T))ismodeledafterTestMethodE399forPlane-StrainFractureToughnessofMetallicMaterials,AppendixA6,withmodificationstoallowfracturetestingofasphaltconcrete.1.3Thetestmethoddescribesthetestingapparatus,instrumentation,specimenfabrication,andanalysisproceduresrequiredtodeterminefractureenergyofasphaltconcreteandsimilarquasi-brittlematerials.1.4ThestandardunitofmeasurementforfractureenergyisJoules/meter2(J/m2)[inch-pound/inch2(in.-lbf/in.2)].1.5Thetextofthistestmethodreferencesnotesandfootnoteswhi......
【中国标准分类号】:Q13
【国际标准分类号】:93_080_20
【页数】:7P.;A4
【正文语种】:


Product Code:SAE J2329
Title:Categorization and Properties of Low-Carbon Automotive Sheet Steels
Issuing Committee:Sheet And Strip Steel Committee
Scope: This SAE Recommended Practice establishes mechanical property ranges for low-carbon automotive hot-rolled sheet, cold-rolled sheet, and metallic-coated sheet steels. It also contains information that explains the different nomenclature used with these steels.