RET复配SBR改性沥青流变特性及机理分析陈治君

4211201611JOUＲNALOFBEIJINGUNIVEＲSITYOFTECHNOLOGYVol．42No．11Nov．2016ＲETSBＲ710064reactiveelastomericterpolymerＲETstyrene-butadienerubberSBＲ．MSCＲ、BBＲ、ＲETSBＲ．ＲETＲET、SBＲ、．ＲETSBＲU414A0254－0037201611－1691－06doi10．11936/bjutxb20160200122016-02-22512780601989—[e-mail]sticsofＲETCompoundSBＲModifiedAsphaltandItsMechanismAnalysisCHENZhijunHAOPeiwenCollegeofHighwayChang’anUniversityXi’an710064ChinaAbstractInordertosolvetheproblemoftheincreasinglyhighrequirementofasphaltpavementperformanceasolutionofreactiveelastomericterpolymerＲETcompoundingstyrene-butadienerubberSBＲwasproposedtoobtainmodifiedasphaltwithsuperiorcomprehensiveandcost-effectiveperformance．InthispapertherheologicalpropertiesandmicromodificationmechanismofdifferentcontentofＲETcompoundSBＲmodifiedasphaltbinderswerestudiedthroughMSCＲtestBBＲtestatomicforcemicroscopeandFourierinfraredspectrumexperiment．ThetestresultsshowthatＲETSBＲandbaseasphalthaveinteractivechemicalreactionsandformanewmacromoleculematerialandchemicalinteractivenetworkstructureincompoundmodifiedasphaltwhichsignificantlyimproveshightemperaturestabilitycrackresistanceatlowtemperatureandstoragestabilityofthecompoundmodifiedasphaltbindersaswelldelaystheearlydiseasesofasphaltpavementeffectively．KeywordsreactiveelastomericterpolymerＲETstyrene-butadienerubberSBＲcompoundmodifiedasphaltbinderrheologicalpropertiesmodificationmechanism、、、、．SHＲP29%52%87%1．20162-3．ＲETreactiveelastomericterpolymer．、SBS、SBＲＲET．ＲET、、4-5．ＲETＲET、ＲET、6．．SBＲSBＲ．SBＲＲET．．．ＲETSBＲMSCＲ、SBS．ＲETSBＲ．1AH－70ＲETSBＲ110%PPA．AH－70ＲET1、2．2ＲETSBＲ2.1ＲETSBＲＲETSBＲ4.0%SBS．ＲET0.8%～1.8%SBＲ2%、3.5%ＲET1.0%、1.5%、2.0%．1Table1Propertiesofthebaseasphalt25℃0.1mm68.260～80T0604/℃53.5≥46T060610℃cm35≥20T0605ＲTFOT/%0.46±0.8T0609163℃/%63.5≥61T060485min10℃cm8≥6T06052ＲETTable2PhysicalpropertiesofＲET/g·cm－30.94ASTMD792/g·10min－14ASTMD1238DSC/℃103ASTMD3417DSC/℃89ASTMD3418ＲETSBＲ2170℃SBＲＲET15～20min3500～4000r/min175～180℃30minPPA160℃30min180℃2h．2.2ＲETSBＲMSCＲSHＲP“”DSＲG*/sinδ．G*/sinδ7-8．MSCＲ9．AASHTOTP70—0710ＲTFOT296111ＲETSBＲ64℃0.1、3.2kPaMSCＲ．25mm、1mm．．ＲETMSCＲ3、4．．ＲETＲJＲdJdＲET3Table3ＲandＲdiffformodifiedasphaltbinders%Ｒ0.1Ｒ3.2Ｒdiff1.0%ＲET+2.0%SBＲ271736.11.5%ＲET+2.0%SBＲ474211.62.0%ＲET+2.0%SBＲ61603.04.0%SBS62586.5Ｒ0.10.1kPaＲ3.23.2kPa．464℃Table4Jnrandtrafficgradeformodifiedasphalt64℃J3.2/kPa－1Jd/%1.0%ＲET+2.0%SBＲ0.86442216.41.5%ＲET+2.0%SBＲ0.46446418.72.0%ＲET+2.0%SBＲ0.2157096.14.0%SBS0.2496326.5＜1.0＜75＞1×107＜0.5＜75＞3×107J3．23.2kPa．．SBS2%ＲETSBＲSBS2%ＲETSBＲ4.0%SBS．AASHTO《M320—09》MSCＲ41.0%ＲETAASHTO1.5%、2.0%ＲET4.0%SBSAASHTO．2.3ＲETSBＲBBＲBBＲＲETSBＲ．Sm．Smm．SHＲPS≤300MPam≥0.30BBＲ5．5BBＲTable5ＲesultsofBBＲtest1.0%ＲET+2.0%SBＲ1.5%ＲET+2.0%SBＲ2.0%ＲET+2.0%SBＲ1.5%ＲET+3.5%SBＲ－12℃99.178.085.737.3S/MPa－18℃270.0257.0268.0116.8－24℃604.0487.0544.0218.7－12℃0.4760.4570.4410.454m－18℃0.3440.3370.3260.394－24℃0.2250.2150.2160.3225ＲETSBSSm．ＲETm39612016SＲET1.5%SＲET1.5%．ＲET1.5%SBＲＲETSBＲmSBＲＲET．3ＲETSBＲ3.1ＲETSBＲＲETSBS、SBＲＲET．ＲETSBＲBrukeDimensionEdge50μm×50μmＲETSBＲ．1．1．———．Loeber11AFM．、．12．．SBＲSBＲ．．、．SBＲ．SBＲＲETSBＲＲET1Fig．1MicrotopographyfiguresofasphaltbindersSBＲ－．496111ＲETSBＲ．ＲETＲET．ＲETＲETSBＲ、．3.2ＲETSBＲＲETSBＲ、ＲETSBＲ、1.0%ＲET2.0%SBＲ、1.5%ＲET2.0%SBＲ、2.0%ＲET2.0%SBＲＲETSBＲ．NicoletMagna－IＲ7504000～400cm－1120．2．AH－702919.55cm－12850.18cm－1C—HC—H1599.17cm－1CC1456cm－11376cm－1—CH2——CH31031.78cm－1861.92cm－1808.98m－1721.28cm－1—CH2nn≥4．AH－70、、．13ＲET3434.46cm－1—OHＲET．SBＲ．SBＲ965cm－1．AH－70ＲETSBＲＲETSBＲ2Fig．2FTIＲfiguresofasphaltbinders1400～700cm－11050cm－1ＲET、SBＲ59612016ＲET、SBＲ．41ＲETAASHTO“M320—09”ＲETSBＲ．2ＲET1.5%．ＲETSBＲＲETSBＲmSBＲＲET．3ＲET、SBＲ－．4ＲETSBＲ、．1．DSＲJ．2001343112-115．ZOUGLZHANGXNHANCD．UtilizationofDSＲforevaluationofpavementperformanceJ．JournalofHarbinUniversityofCivilEngineeringandArchitecture2001343112-115．inChinese2CHENCQIANZDCHENLL．ConstructioncontrollingandstrengthincreasingcharacteristicsoflocallydevelopedepoxyasphaltmixtureJ．JournalofSoutheastUniversity201127161-64．3．J．2010133352-356．LILHGENGHSUNYN．Evaluationmethodandindicatorforviscosityofhigh-viscosityasphaltJ．JournalofBuildingMaterials2010133352-356．inChinese4FILIPPOMFELICEGSAＲAFetal．Kerosene-resistantasphaltbindersbasedonnon-conventionalmodificationJ．JournalofTransportationEngineering201112874-881．5EYOABTZKIHMMUGUＲTetal．LowtemperaturefracturepropertiesofpolyphosphoricacidmodifiedasphaltmixturesJ．JournalofMaterialsinCivilEngineering20122481089-1096．6．J．2011314250-253．YUANXLZHANGXXLUCHetal．StudyonＲETmodifyingbubberasphaltbinderJ．JournalofZhongwaiHighway2011314250-253．inChinese7．SHAPPGJ．200429142-44．ZOUGLZHANGXNLIZ．DiscussionsonhightemperaturegradingofsuperpavePGsystemforasphaltbindersJ．JournalofCentralSouthHighwayEngineering200429142-44．inChinese8．SuperpaveJ．20042419-11．YUANYJZHANGZQHUCS．ApplicabilityofsuperpavespecificationtomodifiedasphaltJ．JournalofChang’anUniversityNaturalScienceEdition20042419-11．inChinese9D'ANGELOJKLUTTZＲDONGＲEＲetal．ＲevisionofthesuperpavehightemperaturebinderspecificationthemultiplestresscreeprecoverytestJ．JournaloftheAssociationofAsphaltPavingTechnologists200776123-162．10AmericanAssociationofStateHighwayandTransporta