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高模量沥青混合料抗变形性能及模量预估研究.docx

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高模量沥青混合料抗变形性能及模量预估研究 Abstract Highmodulusasphaltmixture(HMAM)hasbeenwidelyusedintheconstructionofhighwaysandairportsduetoitssuperiorperformanceinresistingruttingandfatiguecracking.ThispaperaimstoinvestigatethedeformationresistanceandmoduluspredictionofHMAMbyconductinglaboratorytestsandnumericalsimulations.TheresultsshowthatHMAMexhibitsexcellentdeformationresistanceunderrepeatedloading,anditsmoduluscanbeaccuratelypredictedusingappropriatemodelsconsideringtheeffectsoftemperatureandloadingrate. Keywords:highmodulusasphaltmixture,deformationresistance,modulusprediction,laboratorytest,numericalsimulation Introduction Highmodulusasphaltmixture(HMAM)isatypeofasphaltconcretethathasahigherstiffnessandstrengththanconventionalasphaltmixture.HMAMiscommonlyusedinheavytrafficpavements,suchashighwaysandairports,wherethepavementissubjecttohighstressfromheavytrucksandaircraft.TheuseofHMAMcanimprovetheperformanceofpavementsintermsofresistancetorutting,fatiguecracking,andothertypesofdistress,leadingtolongerpavementservicelifeandlowermaintenancecosts. OneofthekeyadvantagesofHMAMisitssuperiordeformationresistance,whichistheabilitytowithstanddeformationunderrepeatedloading.Deformationresistanceisaffectedbymultiplefactors,includingaggregatecharacteristics,asphaltbinderproperties,temperature,andloadingrate.Inaddition,themodulusofHMAM,whichisameasureofitsstiffness,alsoplaysanimportantroleindeterminingitsdeformationresistanceandotherperformancecharacteristics.Therefore,itisessentialtostudythedeformationresistanceandmoduluspredictionofHMAMtooptimizeitsdesignandconstruction. Inthispaper,laboratorytestsandnumericalsimulationswereconductedtoinvestigatethedeformationresistanceandmoduluspredictionofHMAM.Thefollowingsectionsdescribetheexperimentalprocedures,testresults,andnumericalmodeling,followedbyadiscussionoftheimplicationsandconclusions. ExperimentalProcedures HMAMspecimenswerepreparedusingaSuperpavegyratorycompactor(SGC)accordingtotheAASHTOT312standard.Theaggregategradationandasphaltbinderpro