ASTM D11307沥青材料的延展性的试验方法

ASTMASTM D11307D11307沥青材料的延展性的试验方法沥青材料的延展性的试验方法 Designation D113 07American AssociationStateHighway andTransportation OfficialsStandardAASHTO No T51Standard Test Method forDuctilityof BituminousMaterials1This standardis issuedunder the f ixed designationD113 the numberimmediately following the designationindicates the year oforiginaladoption or in thecase ofrevision theyear of last revision A numberin parenthesesindicates theyearof last reapproval Asuperscript epsilon e indicates aneditorial changesince thelastrevisionor reapproval This standardhas beenapproved foruse byagencies of the Departmentof Defense 1 Scope1 1This testmethod describesthe procedurefor determin ingthe ductility of a bituminous material measuredby thedistanceto whichit willelongate beforebreaking whentwoends ofa briquetspecimen of the material of theformdescribed in Section4 are pulledapart at a specif i edspeed andat a specif i edtemperature Unless otherwisespecif i ed the testshall be madeatatemperature of2560 5 C andwith aspeedof5cm min65 0 At othertemperatures thespeed shouldbespecif i ed 1 2Because of the largenumber ofmethods forobtainingtest samples it isimpractical todiscuss specif i cproducts inthistest method Refer toindividual productspecif i cations forguidancein obtaininga testsample 1 3The valuesstated inSI unitsare tobe regardedas thestandard Values inparenthesis ininch pound unitsare pro vided forinformational purposesonly 1 4Warning Mercury has been designatedby EPAandmany stateagencies asa hazardousmaterial thatcan causecentralnervous system kidney andliver damage Mercury orits vapor may behazardous tohealth andcorrosive tomaterials Caution should be takenwhen handlingmercury andmercurycontaining products See theapplicable productMa terial SafetyData Sheet MSDS for detailsand EPA s website epa mercury faq htm for additionalinforma tion Users shouldbe awarethat sellingmercury ormercurycontaining products or both in yourstate may be prohibitedbystate law 1 5This standarddoes notpurport toaddress allof thesafetyconcerns if any associated withits use It istheresponsibility of the userof this standard toestablish appro priate safetyand healthpractices anddetermine theapplica bility ofregulatory limitationsprior touse 2 Referenced Documents2 1ASTM Standards 2C670Practice forPreparing Precisionand BiasStatementsfor Test Methods forConstruction MaterialsD5Test Methodfor Perationof BituminousMaterialsD1754Test Methodfor Effectsof Heatand Airon Asphal tic Materials Thin Film OvenTest D2872Test Methodfor Effectof HeatandAir ona MovingFilmof Asphalt Rolling Thin Film OvenTest E1Specif i cation forASTM Liquid in Glass ThermometersE11Specif i cation forWire Clothand Sievesfor TestingPurposesE77Test Methodfor Inspectionand Verifi cationof Ther mometersE220TestMethodfor Calibrationof ThermocouplesByComparison TechniquesE644Test Methodsfor TestingIndustrial ResistanceTher mometers3 Signif icance andUse3 1This testmethod providesone measureof tensileprop erties ofbituminous materialsand may be used to measureductilityfor specif icationrequirements 4 Apparatus4 1Mold The mold shall besimilar indesign tothatshown in Fig 1 The moldshall bemade ofbrass 10 060 1mm thick the endsb andb8being knownas clips and thepartsa and a8as sidesof the mold with a brass baseplate thatislarger thanthe assembledmold The dimensionsof theassembledmoldshallbe asshown inFig 1with thepermis sible variationsindicated 4 2Water Bathfor ConditioningSpecimens A water bathcapable ofmaintaining the specif ied test temperature varying1This testmethod isunder thejurisdiction ofASTM CommitteeD04on RoadandPaving Materialsand isthe directresponsibility ofSubmittee D04 44onRheological Tests Current edition approved Dec 1 xx Published Januaryxx Originallyapproved in1921 Last previouseditionapprovedin1999as D113 99 2For referencedASTM standards visit the ASTM website astm orcontact ASTMCustomer Serviceat service astm For AnnualBook ofASTMStandards volumeinformation refer to the standard s DocumentSummary pageonthe ASTMwebsite 1Copyright ASTM International 100Barr HarborDrive PO BoxC700 West Conshohocken PA19428 2959 United States not morethan0 5 C 0 9 F from thistemperature Thespecimen shallbe immersedand supportedsuch thatit issurroundedby water 4 3Testing Machine For pullingthe briquetof bituminousmaterialapart any apparatusmay beused whichis soconstructedthat the specimen willbe continuouslyimmersedin water while thetwo clipsare pulledapart ata uniformspeed as specified without unduevibration A variationof65 is permissible The waterin thetank of the testingmachineshall coverthe specimenboth aboveand belowit byatleast2 5cm andshallbemaintained within60 5 C 60 9 F of the testtemperature The testing machine shallincorporatea meansby which the elongationat thetime ofrupturecan bemeasured incentimeters 4 4Thermometer Athermometer havinga rangeshown asfollows and conformingto therequirements in aordancewith Specif ication E1 Note1 An equivalentthermometricdevice thathas beencalibrated inaordance withTest MethodE220or TestMethods E644may beused Temperature RangeASTM ThermometerNo 8to32 C63C18to89 F63F4 5Release Agent Amixture such as glycerinand Dextrin talc orKaolin china clay or VersamidResin andmineral oilusedto coat the bottomand sidesof moldto preventthespecimen fromsticking to the mold Other materialsmay beusedfor thispurpose ifthey havebeen shownnot to affect thephysicalproperties of the test specimen 4 6Oven An ovencapable ofmaintaining within65 C 610 F of thetemperature requiredto heatthe sampleso it isjust f l uidenough topour 4 7Trimming Tool A straight edged puttyknife orspatulawider thanthe specimenfor trimming 4 8Specific GravityAdditive A substancesuch asmethylalcohol sodium chlorideor ethyleneglycol usedto adjust thespecif ic gravityof the waterbathto preventspecimen fromingto thesurface of the wateror touchingthe bottom ofthe bath Other additivesmaybeused ifthey havebeen shownnot toaffect the physicalproperties of the specimen 4 9Sieves A300 m No 50 sieve inaordancewithspecif icationE11 N OTE1 In thosecases wheretheductilityspecimens areconditionedin thestandard perationbath at25 C the thermometeror equivalentA Distance betweencenters 111 5to113 5mm B Total lengthof briquet 74 5to75 5mm C Distance betweenclips 29 7to30 3mm D Shoulder 6 8to7 2mm E Radius 15 75to16 25mm F Width atminimum crosssection 9 9to10 1mm G Width atmouth ofclip 19 8to20 2mm H Distance betweencenters ofradii 42 9to43 1mm I Hole diameter 6 5to6 7mm J Thickness 9 9to10 1mm FIG 1Mold forDuctility TestSpecimenD113 072thermometric asprescribed forTestMethodD5maybesubstituted inplaceof theabove 5 Procedure5 1Assemble the mold onabrassplate Coat thesurface oftheplate andinterior surfacesof thesides aand a8 Fig 1 ofthe moldwith a thin layerofamixture ofrelease agent Theplate uponwhich themold isplaced shallbe fl atand levelsothat the bottom surface of themold willbe incontactthroughout Carefully heatthe sampleto preventlocal over heating untilit hasbee sufficientlyfl uid topour After athoroughstirring pour it into themold In fi llingthemold takecare notto disarrangethe piecesof themold thus distortingthespecimen shape Pour thematerial inathinstream backandforth fromend toend ofthemolduntil themold ismore thanlevelfull Allow thefilled moldto coolto roomtemperature for3565min Then placeitin the waterbath attest temperaturefor3565min Remove the test specimensfrom the water bathandimmediately trimthe excessmaterial withthe trimmingtoolto makethe moldsjust levelfull N OTE2 It isremended tothe userof this standard thatallemulsif ied asphaltresidues andcutback asphaltresidues besieved througha300mm No 50 screen prior to pouringtest specimens The currentdistillationprocedures subjectthese materialsto temperatureconditionsthat willnot beachieved in thefi eld and particulatematter maydevelopin the sample residuesthat maydrastically and negatively affectthetestresults If thematerial issieved priorto testing that notationshould beincludedin thereport 5 2Keeping Specimenat StandardTemperature Place thetrimmedspecimen andmold inthe waterbath atthespecifi edtemperaturefor9065min Remove thespecimen fromtheplate bya shearingaction betweenspecimen andplate avoiding anybending ofthespecimen Remove theside piecesaanda8being carefulnottodistort orfracture thespecimen 5 3Testing Attach therings ateach endofthe clips tothepins orhooks inthe testing machine andpull thetwo clipsapartat auniform speedas specifieduntil thespecimen rupturesorreaches thelength limitationsofthe testing machine Measurethe distancein centimetresthrough which theclipshave beenpulledto producerupture orfinal length 6 Report6 1A normal test isone inwhichthematerial rupturesnearthe centerofthespecimen orreaches thelength limitationsofthe testingmachine A ruptureourring ateither clipshall notbeconsidered normal 6 2If thebituminousmateriales incontact withthesurface ofthewateror thebottomofthe bath thetestshall notbeconsidered normal Adjust thespecific gravityofthebath byusinga specific gravity additiveas describedinSection4 8sothat thetestspecimenneither estothesurfaceofthewater nor touchesthebottomofthebath at any timeduring thetest N OTE3 Some additivesusedtoadjustthespecificgravityofthewaterbath aretoxic andcan causecorrosion ofthetestingmachine If specifi cgravityadjustments havebeen madeitisremended towear gloveswhenplacing handsinthebath fluid Frequent bathfluid changesareremended toprevent damagetothetestingmachine 6 3Report anormaltestas theductility ofthe sample If anormaltest isnot obtainable report theductility asbeingunobtainable underthe conditionsofthetest If rupturedoesnot ourdue tolength limitationsofthetestingmachine report ductilityas thelength limitationin cm for example 150cm If this test ing isperformed onless thanthreereplicates ofthe samesample dueto insufficientmaterial include thenumber ofreplicates usedinthetest report 6 4In theevent ofa discrepancy the refereemethod shallbeto performthetestusing threereplicates If thediscrepancyinvolves adistillation residue pour thematerial througha300 m No 50 sieve thathasbeenpreheated at13565 C 275610 F priortopouring intotest molds Report theaverageof threenormal testsas theductility ofthesample 7 Precision7 1Criteria forjudging theaeptability ofductility testresultsat25 C 77 F obtained bythistestmethod areshownin Fig 2 N OTE4 The precisionstatement forductility as presentedinFig 2 isbased ontests performedon asphaltcements The precisionof testsonresidues suchasthose obtainedby TestMethods D1754and D2872 have notbeen established N OTE5 The numbersplotted inFig 2represent the 1S and D2S limits forsingle operatorprecision andmultilaboratory precisionasdescribed inPractice C670 N OTE6 Insufficient dataare availableto properlydef ine precisionat15 6 C However analysis ofdata resultingfrom testsby13laboratorieson oneasphalt forwhichtheaverage ductilitytest resultwas45cm showsamulti laboratory precision D2S of23cm 8 Keywords8 1ductility ductility mold ductilometerD