HowPavementWorks沥青路面工作原理

HOWHOTMIXASPHALTWORKS

热拌沥青工作原理HotMix

Asphalt

热拌沥青HowAsphaltBinderBehaves

沥青结合料性能BehaviorDependson性能主要取决于：Temperature温度TimeofLoading荷载作用时间EffectofTemperature

温度影响Howhardisthewater?

水的硬度是多少？ASPHALTBINDER

沥青结合料SolidBehavior固态性能LiquidBehavior液态性能Stiffness硬度EFFECTOFTEMPERATURE温度影响SolidBehavior固态性能HighTemperature高温LowTemperature

低温Liquid

Behavior液态性能Whichis

Better????哪一个更好呢？AsphaltsAandBarethesamepenetration沥青A和B的针入度是一样的AsphaltA沥青AAsphaltB沥青B

黏度Viscosity-20771402752-7SUPERPAVEAsphaltBinderSpecification

SUPERPAVE沥青结合料技术指标GradingSystemBasedonClimate(PavementTemperatures)PG等级取决于气候（路面温度）

(Summer夏季)(Winter冬季)PG64-22PerformanceGradePG等级Average7-daymaxpavementdesigntemp(ºC)平均7天最高设计路面温度Minpavementdesigntemp

(ºC)最低设计路面温度Temperature,C-20 20 60 135AsphaltBinderTests

沥青结合料测试Doneatdifferenttemperatures在不同温度进行测试TestTemperatureChangesinIncrements

of6C测试温度按照每6摄氏度递增DynamicShear动态剪切,TP5G*/sind,Min1.00kPa 64 70TestTemp测试温度@10rad/secHowtheSpecWorks

技术指标如何工作？RequirementStaysSame要求保持一致TemperatureGrades

温度等级HighTemperature高温58647076LowTemperature低温-22-28-34Ruleof9090度原则ModifiedAsphaltBinder改性沥青结合料Lowtemperaturefrombaseasphalt低温性能来源于基质沥青Hightemperaturechangedwithmodifier高温性能来源于改性剂RollingThinFilmOvenTest

(ShortTermAging)

旋转薄膜烘箱测试（短期老化）163CSimulatesConstructionAging2-12模拟施工老化过程HighTemperatureTest(Rutting)

高温测试（车辙）Doneat

HighTemperature

Grade在高温条件下进行FixedPlate固定盘Binder结合料2-15PressureAgingVessel压力老化容器

(LongTermAging长期老化测试)SimulatesIn-ServiceAging2-14模拟使用老化过程LowTemperatureTest(Cracking)低温测试（开裂）Done10ºCWarmerthan

LowTemperature

Grade2-15TrafficSpeedEffect车速影响Dependson

speedoftraffic车速影响

Highspeed(100k/h)高速PG64-22Slowerspeed(50k/h)低速PG70-22Stoppedspeed停止（交通灯）

(trafficlights)PG76-22RutResistance抗车辙RutResistance抗车辙Effectedby取决于：Aggregate

Properties骨料性质Volumetric

Properties体积性质AirVoids孔隙STIFFNESSANDTHEINDIANAPOLISMOTORSPEEDWAY印第安纳赛车场硬度ABUSYINTERSECTION繁忙路口PAVEDWITHREGULARMIX,AGE2YEAR普通路面，通车两年REPAIRPATCH维修处AGE2YEAR两岁Toosoft太软Stiffenough足够硬度RuttingInAsphaltLayer

沥青层面车辙HMA

15cmAggregate

Base骨料基

30cmSubgrade路基MixtureStiffness混合料硬度PAVEDWITHREPLACEMENTMIX,混合料修补AGE3YEAR通车三年After9years9年以后FATIGUECRACKING疲劳开裂Effectedby取决于Asphaltcontent(mixtureproperties)沥青混合料性质Thickness厚度FatigueCracking疲劳开裂DURABILTIY耐久性Effectedby取决于：Asphaltcontent沥青含量Compaction(in-place

voids)压实（到位空隙）Raveling剥离(segregation)Raveling剥离

(segregation)LowTemperatureCracking低温开裂TopDownCracking向下开裂TopDownCracking向下开裂RavelingandCracking

剥离和开裂BaseFailure基层破坏HMAPerformanceProperties

HMA性质MixProperties混合料性质AsphaltContent沥青含量AirVoids孔隙VMA矿料间隙度Density密度Segregation剥离RehabilitationandConstruction恢复和建设MillSurface铣刨面层Toremoveundesirablematerial移除不良材料Tore-establishgrades重新建立等级MillingMachine铣刨机Sweepto

RemoveLoose

Debris

清扫疏松碎片MilledSurfaceReadyforTackCoat

铣刨后的表面供粘接层使用PoorMillingPatternGeneralSevereRutting

严重的车辙LocalizedSevereRutting当地严重车辙Milloldsurface铣刨旧路面Need4to6inchesofgoodmix需要4-6英尺的新路面LocalizedSevereRutting

当地严重车辙Subgradeproblem-Digoutandpatch路基问题-深挖修补ConcretePavement水泥路面ReflectiveCracking反射裂缝Rehabilitat