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简介：Theobjectiveofthisresearchwastoshowawaytoconductrejuvenationofagedpolymermodifiedasphaltbinder(PMB)successfully.TofullyevaluateandunderstandtherejuvenationofagedPMB,thePenetrationgradetestsincludingpenetration,softenpoint,ductilityandelasticrecoveryandSuperpaveTMPGgradetestsincludingDSR,BBRandDDTwereconducted.TherejuvenationeffectofagedPMBbyutilizingafluidrecyclingagentincommonuseforbinderrejuvenationwasevaluated.AndthenthecompoundrejuvenationeffectofagedPMBbyutilizingtherecyclingagentwithanewmodifyingadditiveforbindermodificationwasevaluated.Theexperimentalresultsindicatedthattherecyclingagentincommonusecurrentlydoesnotapplytopolymermodifiedasphaltbinderrejuvenation.Buttherecyclingagenttogetherwiththemodifyingadditivecanrestorethecharacteristicsofagedpolymermodifiedbinderverywell.Therefore,compoundrejuvenationofpolymermodifiedasphaltbinderisrecommended.

简介：Basedonstatisticsprinciple,randomerrorandsystematicerrorwereconsideredandthevolumetricpropertiesofthetwomixturestypes,namelyAandB,werestatisticallyanalyzedusingdifferentdistributionmethods.Seventy-twosamplesofmixtureAandfifty-twoofmixtureBwerefabricatedusingtheMarshallmethod.Theprobabilitydistributionswerecomparedonthebasisofgoodnessoffit.Weibullmodelwasfoundtobemostappropriatemodelfordescribingtheasphaltmixturesvolumetricpropertiesdistribution.Thetwo-parameterWeibulldistributionfunctionappliedwelltomodelthebulkspecificgravityandvoidsfilledwithasphaltdata,whereas,thethree-parameterWeibulldistributionappearedtobemoreappropriateinthediscussingofairvoidsandvoidsinmineralaggregate.Theexperimetalresultsisrevealedthatcomparedwiththemeanvalue,thepeakvalueofWeibulldistributionwassuggestedasanalternativeandmorepowerfulparameterfordescribingthetestdatadistributioncharacteristic.Theanalysisoftestresultsalsorevealedthatthereweresignificantdifferencesinthevolumetricpropertiesofthetwotestedmixturesforthesameconfidencelevel.Theconfidenceintervaldecreasedwiththedecreasinginreliability.

简介：压缩的质量对热混合沥青(高端内存区)的表演重要人行道。沥青人行道的最早熟的失败涉及差的压缩。高端内存区混合物特征的压缩被学习。压缩测试用完了典型广泛地使用的高端内存区混合物，包括有不同名字的最大的总数尺寸的稠密的阶段沥青混合物(AC13，AC20，AC25)，并且有不同阶段(AC13，SMA13，Sup13和OGFC13)的混合物。高端内存区混合物在不同压缩温度和马歇尔打击数字被取样，在60和175栠杩?汥獡楴?潭畤畬?湡?楨桧琠浥数慲畴敲猠慴楢楬祴之间变化。

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简介：面包屑橡胶修改了包含30网孔的20%面包屑橡胶粒子的沥青被扫描电子显微镜(SEM)在沥青观察小宇宙的外观和面包屑橡胶粒子的典型分发检验了。SEM图画表明面包屑橡胶粒子在沥青均匀地散布并且他们与沥青兼容很好。shear爬面包屑橡胶的测试修改了沥青被执行在?10结合了穿着的板成功地在下列过程被获得：从18张层Al1060/Al3003表的基本的穿着的表第一在450点与44%的起始的滚动减小被获得???????????????″??吗？？

简介：这份报纸论述方法由压电的生成器从沥青人行道收获机械精力。结果证明在沥青人行道的势能能每公里每小巷直到150kW/h。机械精力的部分能被压电的变换器收获。七个典型变换器的表演通过有限元素分析被检验。PZT堆的结果表演并且多层，在沥青人行道环境的钗钹和桥罐头工作。PZT堆积并且多层更高让精力变换评价。然而，如果这些变换器在人行道直接被嵌入，全部的收获精力是小的。一个原型人行道发电机用PZT堆积被开发增加收获精力。发电机能在交通拥挤下面从人行道收获超过50kW/h精力。816PZT堆积为一个发电机被推荐。圆形状被建议让PZT堆积减少应力的集中。并且多层的结构被推荐因为PZT堆发电机的电的潜力到减少。生成器能在沥青人行道作为传感器被扩大，它能被用来监视交通，人行道压力和温度。

简介：我们调查了用原子力量显微镜学(AFM)在中国使用的三沥青(SK，Karamay，和Esso)的微观结构形态学。地形学和阶段对比图象被获得。地志的侧面和三幅维的图象被描述。微观结构的粗糙是计算的。并且沥青的化学作文被测试解释沥青的微结构机制。结果证明在原子力量显微镜学的地形学和阶段图象是适当的评估沥青文件夹的微观结构。在包括为在这研究的三沥青的像蜜蜂的结构，地志的侧面，3D图象，和粗糙的微结构形态学有重要差别。在沥青文件夹的微观结构有三个不同阶段。油来源和沥青的化学作文，特别沥青质内容在微观结构上有大影响。

简介：由使用包含ATH粉末的延迟火焰的多孔的沥青人行道改进隧道火保护的一个新方法被介绍。基于缩影多孔的沥青(PA)和延迟火焰的多孔的沥青(FRPA)的设计并且进行的燃烧试验，燃烧时间和温度被学习与水泥混凝土人行道，稠密等级的高端内存区和SMA作比较。燃烧试验和人行道表演测试的结果显示FRPA象高速公路隧道的人行道材料适当、合适。

简介：Top-downcrackinasphaltpavementshasbeenreportedasawidespreadmodeoffailure.Asolidunderstandingofthemechanismsofcrackgrowthisessentialtopredictpavementperformanceinthecontextofthicknessdesign,aswellasinthedesignandoptimizationofmixtures.UsingthecoupledelementfreeGalerkin(EFG)andfiniteelement(FE)method,top-downcrackpropagationinasphaltpavementsisnumericallysimulatedonthebasisoffracturemechanics.Aparametricstudyisconductedtoisolatetheeffectsofoverlaythicknessandstiffness,basethicknessandstiffnessontop-downcrackpropagationinasphaltpavements.Theresultsshowthatlongitudinalwheelloadsaredisadvantageoustotop-downcrackbecauseitincreasesthecompoundstressintensityfactor(SIF)atthetipoftop-downcrackandshortensthecrackpath,andthusthefatiguelifedescends.TheSIFexperiencesaprocess'sharplyascending—slowlydescending—slowlyascending—sharplyascendingagain'withthecrackpropagating.Thethickertheoverlayorthebase,thelowertheSIF;thegreatertheoverlaystiffness,thehighertheSIF.Thecrackpathishardlyaffectedbystiffnessoftheoverlayandbase.

简介：Forthemostcoastalareaswheretheairisveryhumid,studyontheeffectofhumidityontheperformanceofasphalthasitspracticalsignificance.However,limitedresearchhasbeendonetoinvestigatetheeffectofhumidityonrheologicalpropertiesofasphalt.Inthisstudy,asphaltbinderswereagedinthepressureagingvessel(PAV)underdifferentconditionsofmoistureandagingtime.ThenDynamicShearRheometer(DSR)andBendingBeamRheometer(BBR)measurementswereconductedtoobtaintheparametersrelatingtothecomplexmodulus,phaseangle,failuretemperature,andcreepstiffness.Itwasfoundthatthelowtemperatureperformancedecreasedasevidencedbytheresultsofthecreepstiffness.WhiletherewerenosignificantdifferencesamongconditionedbindersbasedoncomplexmodulusG*andphaseangleδ,itwasfoundthattheδvalueincreasedwhenthehumidityincreasedfrom0%to80%,andthentheδvaluedecreasedwhenthehumidityincreasedto100%.Inaddition,theresultsofthefailuretemperatureindicatedthatthehumidityof80%wouldbeacriticalpointforthehightemperatureperformanceoftheasphaltbinders.

简介：Thedensityofasphaltwasmeasuredwiththepycnometeranddensitometer.Creeppropertiesoftheasphaltwereinvestigatedwiththebendingbeamrheometerattemperaturesrangingfrom0℃to-36℃.Theasphaltdensitydatausedtocorrelatewiththecreeppropertieswerecalculatedfromtheregressionequationofdensityandtemperature.TheasphaltsampleusedtodeterminethecreeppropertywasagedbythestandardRTFOTtestandthePAVtest.Thetestresultsshowedthattheasphaltdensityhadalinearrelationshipwithtemperaturechanges.Thelogarithmofthecreepstiffnessandtheslopeofthelogarithmofthestiffnessat60secondsalldemonstratedalinearrelationshipwiththedensity,andtheregressioncoefficientofthesedatawasaround0.99.Thecreepstiffnessandtheslopeofthecreepstiffnesscanbecalculatedfromtheasphaltdensityatthesametemperature.

简介：超分子的紫外抵抗materiallayered修改的沥青的动态rheological性质加倍氢氧化物(LDH)被学习借助于动态砍电流计(数据设置就绪)测试。二典型基础沥青被选择，由2不同LDH的modifi编辑满足。数据设置就绪测试在原来的样品上被执行，在暴露了到以后，取样室外并且在artificial以后的样品分别地加速了紫外老化测试分析rheological性质。当LDH内容在沥青重量，高温度表演和疲劳的3wt%和5wt%之间时，它被发现那modifi编辑沥青的抵抗性质变得更好，紫外老化抵抗性质被改进。

简介：EvaluationofhightemperatureperformanceofSBS-modifiedasphaltmixturewaspresented.Bothwheelloadedmethodandcreepmethodwereadoptedfortwodifferentmixturesandtwokindsofspecimenswithdifferentheight,andcorrespondingindicatorsweremeasured.Meanwhile,thecorrelationbetweentheseindicatorswasthoroughlyanalyzedandtwokindsofmixtureswerecompared.TheexperimentalresultsshowthatthereisagoodlinearrelationshipbetweenLWTindicatorsandCTindicatorsforM-13,whilearelativelypoorrelationshipforM-25,especiallythatbetweendynamicstiffnessandstaticstiffnessandthatbetweendynamicstabilityandstaticcreepstiffness.Besides,logarithmicrelationshipbetweenDSandRDhasahigherdeterminationcoefficientthanthatforlinearrelationship.Thus,multi-indexevaluationshouldbetakenforsyntheticallyassessinghightemperatureperformanceofasphaltmixture.

简介：FordeterminingtheoptimalpercentageofRAPmaterialincentralplanthotrecycling,binderwasrecoveredfromRAPbymeansofAbsonrecoverymethod,andpropertiestestsofmixedbindersconsistingofrecoveredasphaltandfreshasphaltatdifferentratioswereperformed.Inaddition,theperformancesofmixturewithdifferentpercentagesofRAPsuchasruttingresistance,anti-cracking,moisturesusceptibilityandfatigueresistanceweretested.ThebindertestresultsshowedthatthehightemperatureperformancewasimprovedwiththeincreaseofthepercentageoftheRAP,whilethelowtemperatureperformancewasdeclined.Whenthepercentageoftherecoveredbinderwaslessthan30%,themixedbindercouldmatchthetechnicalstandardsforfreshasphalt.TestsonthemixturesshowedthatruttingresistanceincreasedgraduallyasRAPpercentageincreased,whilethermalanti-crackingatlowtemperatureandfatiguepropertiesdeclined.TheeffectofthepercentageofRAPonmoisturesusceptibilitywaslimited.ItisindicatedthatlowtemperatureperformanceandfatiguepropertiesareimportantforselectingtheoptimalpercentageofRAP.Basedondataobtainedfrombindersandmixtures,itisconcludedthatthemaximumpercentageofRAPisapproximately30%withouttheadditionofrejuvenatingagent.

简介：TheagingmechanismofSBSmodifiedasphaltduringitsagingprocesswasstudied.Thecharacterizationsofbaseasphalt,SBSpolymeranditsmodifiedasphaltweredeterminedindifferentagingtimebyFouriertransforminfraredspectrum(FTIR).FTIRshowsthatoxidativedehydrogenationreactionoccursinasphalt,andunsaturatedcarbonbondisgeneratedundershort-termthermalagingcondition.Additionally,SBSpolymerwasagedsignificantlyunderthatcondition,thespeedofwhichwasfasterthanthatofbaseasphalt.TheaginglawsofbothasphaltandSBSpolymerduringtheagingprocessofSBSmodifiedasphaltweresimilartotheiraginglawsrespectively.DuetotheprotectiveeffectbetweenasphaltandSBSpolymer,theagingdegreesofasphaltandSBSpolymerwerelowerthanthoseagedindependently.

简介：为了调查沥青人行道热适用密封剂的高温度的表演，以及减少密封剂撤退，弄软的点测试和流动的失败，测试(为评估高温度的表演的二存在方法)被进行。两测试不能精确地在高温度反映密封剂的粘附表演，这被发现。为这个目的，为PSAT的粘附测试(迫使敏感粘带)作为一本参考书被拿了开发对评估粘附表演合适的一台设备，由在高温度根据道路条件修改相关测试参数。13普通密封剂在修改粘附测试被测试，弄软点测试和流动测试。试验性的结果显示出那不重要的关联(p>0.05)在粘附价值，弄软的点，粘附价值和流动价值之间存在；当时重要关联(p<0.05)在弄软的点和流动价值之间存在。修改粘附测试在区分不同密封剂的高温度的粘附表演是有效的，并且能作为一个标准方法被使用评估如此的表演。

简介：烟抑制机制和沥青的表演上的扩展石墨的效果被适用学习红外线的光谱学(英尺红外)，X光检查衍射(XRD)，扫描电子显微镜学(SEM)和全面热分析(TG，DSC)。试验性的结果证实与可扩充的石墨被混合的沥青将在热混合，和扩展石墨层的过程膨胀将在沥青由轻部件胀大。在沥青的轻部件并且哼扩展石墨表面或在在盘子之间的扩展石墨层的塞子的部分上的吸附使成核结晶化成为了生长。并且货车derWaals力量并且有效地格子罐头结合制止沥青烟版本。同时，有氧化罐头的膨胀代理人传播了进沥青，导致沥青氧化并且塑料减退，当韧性减少时。扩展石墨，SBS修饰词和环境友好的可塑剂习惯于合成修改沥青。根据沥青烟版本实验，沥青性能的正常测试，Brookfield粘性测试，RTFOT测试和沥青，混合测试(高温度稳定性，低温度稳定性，水稳定性)，比到SBS的矩阵沥青和等价物的修改沥青的，修改沥青表演才好。而且，它有好烟抑制效果。

简介：ThedistributedopticalfibersensingtechnologywasusedtoinvestigatethefracturebehavioroftheEpoxyAsphaltMixture.Thespatialdistributionandvariationofthestraindevelopmentwithcrackpropagationwereacquiredusingthebrillouinopticaltime-domainreflectometerthroughtheloadingexperimentsofthecompositebeamstructure.Inaddition,afiniteelementmodelofthecompositebeamstructurewasdevelopedtoanalyzethemechanicalresponsesoftheepoxyasphaltmixtureusingtheextendedfiniteelementmethod.Theexperimentalresultsshowthatthedevelopmentofcrackpropagationbecomesinstablewiththeincreaseoftheload,andlargerloadswillgeneratedeepercracks.Moreover,thenumericalresultsshowthatthemechanicalresponseofthecracktipchangeswiththecrackpropagation,andtheworstareasthatsubjectedtocrackdamagearelocatedonbothsidesofthecompositebeamstructure.

简介：摘要：沥青混凝土心墙堆石坝为水电工程中常见坝型，在国内外均有广泛应用。沥青混凝土心墙作为大坝防渗建筑，其施工质量将直接影响到大坝坝体的防渗能力和使用寿命。然而，如何才能有效确保沥青混凝土心墙施工质量呢？本文通过巴基斯坦卡洛特水电站项目沥青混凝土心墙的实施案例，全面阐述了沥青混凝土心墙的施工过程，对类似项目在实施过程中的原料选用、工艺流程及技术参数等质量控制有较大的借鉴意义。