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再生剂对再生沥青混合料路用性能的影响研究.docx

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再生剂对再生沥青混合料路用性能的影响研究 Abstract Theadditionofrecyclingagent(RA)toreclaimedasphaltpavement(RAP)isacommonpracticeintheproductionofasphaltmixes.ThisstudyaimstoinvestigatetheimpactoftheuseofRAontheroadperformanceofasphaltmixturesincorporatingRAP.ThelaboratorytestresultsshowthattheadditionofRAleadstoimprovedmechanicalproperties,suchasstiffnessandrutresistance,ofasphaltmixtures.Moreover,theincorporationofRAinasphaltmixesenhancestheirmoisturesusceptibilityandfatigueperformance.Overall,theuseofRAinasphaltmixesappearstobeapromisingsolutiontoimprovethesustainabilityofroadconstructionwhilemaintainingtheirroadperformance. Introduction Therecyclingofasphaltpavementisapressingconcerninthepavementindustry.Theuseofrecycledasphaltmaterialscansignificantlyreducetheconsumptionofvirginmaterials,mitigatetheenvironmentalimpactsofroadconstruction,andenhancethesustainabilityofinfrastructuresystems.However,thephysicalandchemicalpropertiesofthereclaimedasphaltpavement(RAP)differfromthoseofvirginasphaltmaterials,resultinginlower-qualityasphaltmixtures.ToimprovetheengineeringpropertiesofasphaltmixesincorporatingRAP,recyclingagents(RA)arecommonlyaddedtomodifytheagingpropertiesandenhancetheworkabilityofthemixtures. RAisablendoforganicandinorganiccompounds,suchasrejuvenators,polymers,anddehydratedoils,thataremixedwithRAPtoimproveitsrheologicalproperties.TheincorporationofRAalterstheagingcharacteristicsofasphaltmixtures,resultinginasignificantperformanceimprovementoftheasphaltpavementlayer.However,theeffectofRAontheroadperformanceofasphaltmixesremainsunder-investigated.Hence,acomprehensivestudyisrequiredtoevaluatetheinfluenceofRAontheperformanceofasphaltmixesincorporatingRAP. Objectives ThisstudyaimstoinvestigatetheimpactofRAontheroadperformanceofasphaltmixescontainingRAP.Specifically,itaimsto: -AssessthemechanicalstiffnessandrutresistanceofasphaltmixeswithandwithoutRA -EvaluatethemoisturesusceptibilityandfatiguecharacteristicsofasphaltmixesincorporatingRA -IdentifytheoptimaldosageofRAtoenhancetheen