国际橡胶沥青会议

DevelopmentofAsphaltPavementinJiangsuExpresswayQianGuochaoDeputydirector,Ph.D.JiangsuProvincialCommunicationsDepartmentNov.2,2009Contents1、GeneralOverview

2、ChallengeinAsphaltPavement3、DevelopmentPavementTechnology4、ApplicationofNewTechnique5、PavementQuality6、ConclusionOntheeasternChinacoastWheretheYangtzeRiveremptiesintotheseaArea:102,600sqkmPopulation:76millions.GDP4800$/personKnownasa"landoffishandrice”Jiangsu4JiangsuTransportationInvestmentInrecent5years,206.1

billionRMBwasinvestedinhighwayandwaterway5JiangsuHighwaysHighwayGradeLength,kmExpressway3725Grade16490Grade219399Grade315351Grade472900Other16034Total130000JiangsuExpresswayExpresswayDevelopmentinJiangsuProvinceTimeExpresswayMileage(Km)

Built3000kminpast15years3725kmtill2008ExpresswayDensity,No.1inChinaJiangsuExpresswaylanesLength,Km41630627108860Total52004Lanes6Lanes8LanesOtherProvince

OpenJiangyinYangzteBridgeRunyangBridgeNanjing2rdBridgeNanjing3BridgeSutongBridge1088m4wordrecord

UnderConstructionTaizhouYangzteBridgeNanjing4thBridgeChongqiBridge

江苏代表了中国跨江大桥建设的最高水平JiangsuBridgesSutongBridge,1088mRunyangBridge,1490m9Have

themostwaterwaymileageanddensityinChinaInlandWaterway4800km20%

of

china

Golden

WaterwayYangzte

RiverJinghang

canalWaterwayNetworkin20202longitudinal4transverseTotal3455kmJiangsuWaterway10JiangsuPortsMilliontonDockBerth252No.1inChina2007freightturnovervolume1.05billiontonNo.1inChinastandardcontainers6.2M4.9timesthan20022010Build5portsof100Mtonstandardcontainers12M11JiangsuRailwayOpen850kmin5yearsMileage:1600kmIn5years1hourcitygroupNanjing,ShanghaiandHangzhouWorldlevelRailwaynetwork12JiangCivilAviationNow7CivilAirport190

fightsinternational30Domestic160Passenger

10Millions/y.Cargo200000t/y.To2020Passenger100

millions/y.Cargo3.6millionstonContents1、GeneralOverview2、ChallengeinAsphaltPavement3、DevelopmentPavementTechnology4、ApplicationofNewTechnique5、PavementQuality6、ConclusionDevelopmentofJiangsuAsphaltPavement

ThreePhasesofJSAsphaltPavementPhaseI（Beginning）1992~2000，1000kmFollowSpecificationDealingwithpavementprematureDamageUsuallyneedRepairingwithin3yearsPhaseII（Developing）2001~2005，1880kmSMA，Superpave、AC-S……Prolongingservicelife，norapairingwithin5yearsPhaseIII（Improving）2006~2015OGFC、AR-AC、PA、CTBSmooth,Safe,Environment-friendly,Long-lifeNorepairingwithin10yearsChallengein2000Shanghai-NanjingExpressway248Kmopentotrafficin1996Rehabilitationto8lanesin2005HeavyDutyExpresswayPavementPrematureFailure1997~2004pumping,pothole,revealingTypicalMoisturedamageChallengein2000XichengExpressway35Km,opentotrafficin1999Beijing-ShanghaiExpressway261Km,opentotrafficin2000;18000Vehicle/Dayin200470%truckPavementFailureAfter1~2yearsRevealing,pothole,ruttingChallengein2000forJSPavementpavementearlydamageisveryseriousMoisturedamageRuttingTherushhourofconstructionappearedin20011000kilometersbe-buildingineveryyear;300kilometersfinishedineveryyear.Whatshouldwedo?Contents1、GeneralOverview2、ChallengeinAsphaltPavement3、DevelopmentPavementTechnology4、ApplicationofNewTechnique5、PavementQuality6、ConclusionAsphaltTreatedBaseLocalSpecificationoasphaltAggregateEndResultSpecificationMaterialConstructionPerpetualPavementAC-SSMAStructureManagementSuperpaveCompactionSegregationPermeabilityPorousAsphaltPavementResearchStatisticalProcessControlTypicalResearchProjectResearchonProlongingServiceLifeofAsphaltPavementResearchtime:2001~2003Conductedby:ExpresswayConstructionHeadquarters

ofJiangsuProvince,JiangsuTransportationResearchInstituteSoutheastUniversityContents:ImprovingdurabilityofasphaltpavementbyresearchingconstructiontechnologyEstablishinglocalspecificationofasphaltpavementdesignandconstructionwhichissuitableforJiangsuProvince’sclimateandheavytraffic,includingdesignmethodofasphaltpavement,testmethodofasphaltandasphaltmixture.Objective:

Nolarge-areadamagewithin5years

3.1

OptimizationofPavementStructureAdjustmentofHMAThicknessSurfacecourse:4cm→4-4.5cmBasecourse:7cm→8-10cmBinderCourse:5cm→6cmTotalHMAThickness:16cm→18-20cmUsingDenseMixtureThreelayersalladoptdense-gradationmixturetoimproveresistibilityofwaterdamage.IncreaseratioofthicknesstoNMASTheratiooflayerthicknesstoNominalMaximumAggregateSizeisnotlessthan3times.TypicalJSPavementStructureBefore20004cmAC16B6cmAC25I6cmAC25II22～30cmLFABaseLFtreatedSoil4cmAK16C5cmAC25I7cmAC25II32cmCTBLFTreatedSoil4.5cmAK16C/SMA165cmAC25I7cmAC25I34cmTwoAshes-GravelBaseLFTreatedSoilShanghai-NanjingExp.1996Wuxi-JingjiangExp.1999Beijing-ShanghaiExp.2000TypicalPavementStructureduring2001-2005YearNameofExpresswayHMAThicknessSurfacecourseBinderCourseBasecourseBase2001Lian-XuNing-Jing-YanNing-Su-Xu17cm4cmSBSAK-13A4cmSBSSMA136cmAC-20I6cmSup207cmAC-25I7cmSup25LFACTB2002Fen-GuanNing-Jing-YanLian-Xuy17cm4cmSBSAK-13A4cmSBSSMA136cmSBSAC-20I6cmSup207cmSBSAC-25I7cmSup25CTB2003Jing-Fu,Xu--SuNing-Hang17~18cm4cmSBSAK-13A4cmSBSSMA134cmSBSSup136cmSBS

AC-20I6cmSup207～8cmSBS

AC-25I7～8cmSup25CTB2004Ning-HangJiang-TaiChang-ChengBeltwayofYangzhou18cm4cmSBSAK-13A4cmSBSSMA136cmSBS

AC-20I6cmSup208cmSBS

AC-25I8cmSup25CTB2005Yan-TongSu-Huai18~20cm4cmSBSAK-13A4.5cmSBSSMA136cmAC-20S6cmSup208cmAC-25S9.5cmSup25CTB3.2

MixtureDesignIntroducingNewMixturesSMASuperpaveImprovingtraditionalmixturedesignmethodAK13A→AK-13SAC-20I→AC-20SAC-25I→AC-25SAC-25ISup-2525SMADesignMethodMarshellcompaction50blows/Face→75Blows/FaceDesignAirVoids:4~5%SuperpaveGyratoryCompact100SGCSDesignAirVoids:4%ApplicationinExpressway2500kminJiangsuExpressway85%ExpresswaysurfacecoursesareSMA.SuperpaveTechnicalProgressIn1996,JSIntroducethefirstsetsofSuperpaveEquipmentandtechnologytoAsianJSistheleadingProvinceofSuperpaveinChinaBinderSpecificationJSAdoptsin1999SuperpaveMixtureIn2000,buildthefirsttestsectionIn2005,SuperpaveiswidelyusedSuperpaveConstructionControlMoreCompactionWaterPermeabilityPavementPerformanceMoreuniform,lesssegregationStrongResistanttoRuttingThecostisalmostthesameasAC-IApplicationinExpressway1500kminJSExpressway，2008Effectivetooltosolvepavementearlydamage.Sup-25AC-25IAC-SMixtureTraditionalAC-IMixtureGradationrangtoowideLessstonetostonecontactCausePavementsegregationRuttingAC-SMixtureDesignIdeaMorestonetostonecontactDenseUniformApplicationinExpresswayItwasadoptedinconstructionspecificationofMinistryofCommunicationsin2004.2000kminJSTraditionalAC25IGradationAC-25SGradation3.3

SealCoatandTackCoatSealCoatonCTBModifiedAsphaltEmulsionsinglelayerchipsealisadopted.OtherTypeAsphaltRubberSAMIStrata®MixtureTackCoatbetweenHMAlayersModifiedAsphaltEmulsionPureasphalt0.2kg/m2～0.3kg/m2Constructionusingintelligentdistributortospray3.4

PavementCompactionEnhancingcompactionenergyandusingheavyrubberroller;Oneworksectionisequippedwith:

three25t/30tpneumatic-tiredrollersThree12T+drumvibratoryrollersCompactionstandard:Doublecontrolnotlessthan98%ofMarshallsampleTheoreticaldensityAC-S,Superpave:93%～97%SMA

:94%～96.5%.3.5ApplicationofModifiedAsphaltCirculartracktestshowsthatruttingexistsnotonlyinthesurfacebutalsoinbindercoursebindercoursecontributemostofruttingdeformationInSurfacecourseandbindercourse,useSBSmodifiedasphalttoimprovetheresistancetorutting.

Contributionrateofdeformation(%)

SurfacecourseBindercourseAsphaltGradeinJSExpresswaySurfaceandbindercoursePG70-22PG76-22BasecourseandATBPG64-22PG70-22JSSpecificationsfor70#AsphaltTestItemTechnicalSpecificationsPenetration(25℃,100g,5S)(0.1mm)60—80Ductility(5cm/min,15℃)(cm)

notlessthan100Ductility(5cm/min,10℃)(cm)

notlessthan20SofteningPoint(RingandBall)(℃)notlessthan46Solubility(Chlorylene)(%)

notlessthan99.5Penetrationindex(PI)-1.3~+1.0Thinfilmheatingtest163℃,5hMassloss(%)

notmorethan0.6Penetrationratio(%)

notlessthan65Ductility(15℃)(cm)

notlessthan100Ductility(10℃)(cm)

notlessthan6Flashingpoint(COC)(℃)

notlessthan260Waxcontent(distillationmethod)(%)notmorethan2Density(15℃)(g/cm3)

notlessthan1.01Kineticviscosity(absoluteviscosity,60℃)(pa·s)

notlessthan180Remarks:PGofasphaltis64-22.JSSpecificationsforSBSModifiedAsphaltTestItemTechnicalSpecificationsPenetration(25℃,100g,5S)(0.1mm)50～80Penetrationindex(PI)-0.2～+1.0Ductility(5cm/min,5℃)(cm)

notlessthan30SofteningPoint(TR&B)(℃)notlessthan60Kineticviscosity(60℃)(pa·s)

notlessthan800Kineticviscosity(135℃)(pa·s)

notmorethan3Flashpoint(℃)

notlessthan230Solubility(%)

notlessthan99Segregation,differenceofSofteningPoint(℃)

notmorethan2.5Recoveryofelasticity(25℃)（%）notlessthan70TestafterRTFOTMassloss(%)

notmorethan0.6Penetrationratio(25℃)(%)

notlessthan65Ductility(5cm/min,5℃)(cm)

notlessthan20SHRPPerformanceGradePG70－223.6QualityControlofAggregateAggregateAdmittanceSystemestablishedsince2001.AllSuppliersmustonthelistEquipmentsCrusherTypeSecondaryDustCollectsystemImprovingAggregateIndexCrushingValuein180℃Flat-longparticleContentManagementSelf-checkingSpotcheckFlycheckJSSpecificationforCoarseAggregateIndexTechnicalSpecificationsCrushingValueofGravelnotmorethan(%)20,24(180℃)LosAngelesAbrasionLossnotmorethan(%)30ApparentDensity

notlessthan(g/m3)2.60WaterAbsorptionnotmorethan(%)2.5(lessthan2.2isbetter)AdhesiontoAsphaltnotlessthanNotlessthan5gradewithanti-strippingagentSoliditynotmorethan(%)12FlatandElongatedParticlesnotmorethan(%)13DustContent(WaterWashing<0.075mm)notmorethan(%)1#0.62#

0.83#

1.0SoftStoneContentnotmorethan(%)3Polishedstonevalueofsurfacecoursenotlessthan

(BPN)42Compressionstrengthnotlessthan

(MPa)120JSSpecificationforFineAggregateSpecificationNominalsizeofaggregate（mm）Percentagepassingfollowingsieve（%）9.54.752.300.60.075S150－510085－10040－700－12.5S160－310085－10020－500－12.5Apparentdensityisnotlessthan2.60g/cm3;SandEquivalentisnotlessthan60%(morethan70%isbetter).383.7

PavementsegregationControlResearchonTestingMethod(firstinChina,2001）sandpatchmethodTakecoremethodNucleargaugeinfraredcameraGuideofPreventionAsphaltPavementsegregationApplicationResult:moderate/serioussegregationin2001→

nosegregation/minorin2005

CompactionleveltestedbynucleargaugeJSTestMethodofSegregation(2001)TestMethodIndexNoSegregationMinorSegregationModerateSegregationSeriousSegregationsandpatchmethodTD/TDaverage<1.31.3~1.61.6~1.9>1.9ExtractingcoremethodDensityDifference,g/cm3<0.040.04~0.060.06~0.08>0.08Gradingvariety,%/1sieveholemorethan>5%1sieveholemorethan>10%2sieveholesmorethan>10%Varietyofasphaltcontent,%<0.20.2～0.40.4～0.6>0.6NuclearDensityInstrumentDensityDifference,g/cm3<0.040.04~0.060.06~0.08>0.08infraredcameraTemperatureDifference,℃<1010~2020~30>30/WarningRepairRedo3.8

WaterpermeabilitytestJSPermeabilityindexstandardismoststrictinChinaSurfacecourseandbindercoursePermeabilityindex,notmorethan50ml/min;PercentagePassing,notlessthan90%;BasecoursePermeabilityindex,notmorethan60ml/min;PercentagePassing,notlessthan80%.PercentofpassofWaterPenetrationCoefficient(%)SurfacecourseBindercourseBasecourse3.9StrictlyControllingonAsphaltcontentNationalSpecification:±0.3%JiangsuSpecification:+0.2%,-0.1%ContractorAgencyAmericaAverageProjectNumber

3.10StrengtheningConstructionQualityControlEstablishedlocalspecificationSpecificationsforConstructionofJiangsuProvinceExpresswayAsphaltPavementImprovingtherequirementofequipmentBatchplant,>320t/hTwosimilarpaversNon-contactbalancebeamApplyingStatisticalProcessControlforconstructionqualityCarryingoutthird-partytechnologyconsultantforasphaltpavement43StatisticalProcessControlStatisticalProcessControl（SPC）ApplyingSPCtoqualitycontrolDevelopSPCprogramandchartDefiningkeyindexofpavementqualityairvoidsofspecimenairvoidsinfieldAsphaltcontentPercentagepassingofkeysievesizeVMAApplicationinExpresswayYanjiang,beltwayofYangzhou,andYantongExpressway,total1000kmImprovingpavementqualityapparently.Third-partyTechnologyConsultantforconstructionItisasuccessfulexperienceinJiangsuProvince.Third-party

with

Experience

EngineersJiangsu

Transportation

Research

InstituteSoutheast

UniversityTechnologyconsultantPavementStructureOptimizationTechnicalTrainingSelectionand

evaluation

ofrawmaterialMix

formulaDesignQuality

AssuretestduringconstructionSolvingtechnicalproblemduring

constructionRefine

guidanceContents1、GeneralOverview2、ChallengeinAsphaltPavement3、DevelopmentPavementTechnology4、ApplicationofNewTechnique5、PavementQuality6、ConclusionPerpetualPavementTestSection

inYanjiangExpresswayFunctionImprovingsafetyinrainyconditionsReducingnoise.PorousAspahltPavement2005,YantongExpressway2008,NinghangExpresswayOGFC2004,ChangchengExpresswayNormalPavementOGFCPavementPorousAspahltPavementandOGFCPorousAsphaltPavementPAC-13ResultofWaterPermeationofPorousAsphaltPavementafterwateringFunctionimproveshigh-temperaturestabilityofmixture.improvesmodulusofmixtureTestsectionYantongExpressway,200514.95kmAsphaltPenetrationis50MixturetypeisAC-25SStiffAsphaltAsphaltrubberWetprocess18%rubbercontentApplicationAR-SAMIAR-AC13SAR-OGFCAsphaltRubberStressAbsorptionInterayerAR-SAMIAR-SAMIAsphalt:2.5kg/m2Aggregate:12kg/m2CrackResistance≈3cm

HMAApplicationYanhai,2005Ningchang,2007Ninghang,2008Gap-GradeMixtureAR-AC13SAR-AC13SGapGradationHighVMAHighAsphaltcontentCoarseSurfaceTexture.RubberPowderParticleGapGradeAggregateJiangsuAR-AC13SOpenGradeMixtureAR-OGFC13SHighasphaltcontent;Reducenoiseupto5dbImprovingsafetyContents1、GeneralOverview2、ChallengeinAsphaltPavement3、DevelopmentPavementTechnology4、ApplicationofNewTechnique5、PavementQuality6、ConclusionPavementQualityAfter2001PavementMoisturewasEliminatedinJSPavementruttingisunderControlFewpavementrepairwithin8years.Fen-GuanExpresswayOpenin200285kmNorepairwithin7years;Averageruttingislessthan8mm.SegmentPavementStructureSurfacecourseBindercourseBasecourseOPQ21AK-13SAC-20SAC-25SOPQ22SMA-13Superpave-20Superpave-25OPQ23SMA-13AC-20SAC-25SFen-GuanExpresswayRuttingin2008,mmSectionYan-JiangExpresswayYanJiangExpressway113Km,openin2004distributeheavytrafficofHu-NingExpresswayduring2003~2005PavementCondition:goodin5years;Averageruttingislessthan6mm.SegmentPavementStructureSurfacecourse