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1、外文原文where:D1,m=Fracturecoefficients.t=Loadingtimeinseconds.ThecorrelationusedfortheD1fractureparameteris:(3.3.56)where:T=Testtemperature()(i.e.,0,-10,and–20)Va=Airvoids(%)VFA=Voidfilledwithasphalt(%)=100Vbeff=effectivebindercontent,%ARTFO=InterceptofbinderViscosity-Temperaturerelationshipfo
2、rtheRTFOconditionForthemparameter,thecorrelationusedis:(3.3.57)where:T=Testtemperature()(i.e.,0,-10,and–20)Va=Airvoids(%)VFA=Voidfilledwithasphalt(%)Pen77=Penetrationat77=A=InterceptofbinderViscosity-TemperaturerelationshipVTS=SlopeofbinderViscosity-TemperaturerelationshipTheoutcomeofthemva
3、luehasbeensettoalowerlimitof0.01.Forallthreelevelsofdatainput,theDesignGuideprocedurerequirestensilestrengthat–10oC.Level1and2requiresactualtestdatafortensilestrength,whereas,level3hasbuiltintypicalvaluesbasedupontheasphaltmixproperties,similartocreepcompliancevalues.ForLevels1and2,thestren
4、gthtestisconductedonthesametestspecimenthatisusedtoestablishthe100secondcreeptest.Afterthecreeptestiscompleted,failureisevaluatedusingaloadrateof51mmperminute.Thereportedtensilestrengthsaretheaverageofthethreereplicatesused.Intherecommendedtestprotocol,aspecialprocedureisutilizedtodetermine
5、the"failureload"achievedduringtheindirecttensiletest.Thisisagainanimportantmodificationbecausethefailureloadhasbeenfoundtobelessthanthemaximumloadthatthespecimencanundergo.Thus,oncetheinstantoffailureisfound(approachusesthedeflectionmeasurementdifference),thefailureloadcanbedefinedandtheten
6、silestrengthcomputedfrom:(3.3.58)where:Pf=Failureload.Csx=Correctionfactor(previouslydefined).t=Specimenthickness.D=Specimendiameter.ForLevel3analysis,thetensilestrengthat–10oCwasalsocorrelatedwithmixturepropertiesaswiththecreepcompliancefractureparameters.Thebestindicatorsweretheairvoids,t
7、hevoidfilledwithasphaltcontent,thePenetrationat77oF,andtheAinterceptofthebindertemperature-viscosityrelationshipfortheRTFOcondition.Thefollowingcorrelationisusedintheanalysis:(3.3.59)where,thetensilestrength(St)isgiveninpsi.Theoutcomeoftheequationwassett
