沥青路面厂拌热再生及其设备改进技术研究

硕士学位论文沥青路面厂拌热再生及其设备改进技术研究张雄导师姓名职称张争奇教授申请学位级别硕士学科专业名称道路与铁道工程论文提交日期2012年4月25日论文答辩日期2012年6月8日学位授予单位长安大学分类号:U416.210710-2009121252ResearchonHotMixPlantRecyclingandItsEquipmentTechnologyImprovementsofAsphaltPavementADissertationSubmittedfortheDegreeofMasterCandidate：ZhangXiongSupervisor：Prof.ZhangZhengqiChang’anUniversity,Xi’an,ChinaI摘要我国已建成高速公路中90%为沥青路面，道路维修养护产生的废旧沥青混合料逐年递增，数量惊人，传统的废料堆弃处理方式不仅浪费资源，而且污染环境。沥青路面再生技术采用特殊方法对废旧料再生利用，变废为宝，能够有效解决废旧料处置难题，符合我国建立“资源节约型，环境友好型”社会的战略方针，其中以厂拌热再生技术最为成熟，应用最为广泛。本文以厂拌热再生技术为研究对象，从再生混合料性能、再生设备、再生工艺三方面开展研究。再生混合料性能方面，本文分析旧料组成及性能，确定采用新沥青再生方式及新沥青掺量，研究不同旧料掺配率下再生沥青混合料路用性能变化规律，并以此为据，兼顾经济因素，确定适合陕西地区的再生混合料最佳旧料掺配率。利用灰色理论分析不同设计因素对再生混合料各项路用性能的关联程度，为再生混合料设计提供参考；再生设备方面，对比分析国内外各种厂拌再生设备的优缺点，针对第二烘干筒再生设备运行中出现的问题，分析技术原因，提出烘干筒内壁防粘衬里、叶片结构分布等改进方案，使之更适应于当前再生混合料生产，并对改造后的第二烘干筒再生设备提出性能评价指标；再生工艺方面，详细分析厂拌热再生各阶段施工工艺，提出应着重加强旧料处理质量控制，以减小旧料变异性影响，总结并推荐合理的厂拌热再生全过程施工工艺。结合前期理论分析与室内试验成果，依托西禹高速预防性养护工程，铺筑厂拌热再生试验路，检验路用性能，并分析经济社会效益，为厂拌热再生进一步推广提供相关可借鉴经验。结果表明，厂拌热再生沥青路面性能良好，经济社会效益显著，应用前景广阔。关键词：厂拌热再生；旧料掺配率；路用性能；第二烘干筒；设备改进；施工工艺IIAbstractAbout90%oftheexistedexpresswaypavementisasphaltpavementinChina.RAPresultingfromroad’srepairandmaintenanceisincreasingyearbyyear,andthequantityofRAPisamazing.Traditionaldumpingtreatmentisnotonlyawasteofresources,butalsomaypollutetheenvironment.Asphaltpavementrecyclingtechnologyusesspecialmethodstomakewastematerialrecycled,andturnwasteintotreasure.ItisaneffectivemethodtosolvetheproblemofRAPdisposal,accordingtoourstrategicpolicytoestablisha“resource-conserving,environment-friendlysocial.Hotmixplantrecyclingtechnologyismostmatureandwidelyused.Thispaperresearchedonhotmixplantrecyclingtechnologyfrommixtureperformance,equipmenttechnologyandconstructiontechniques.Intermsofmixtureperformance,thispaperanalyzedtheRAPproperties,determinedtherecycledmethodsandcontentofnewasphalt,studiedonchangelawofrecyclingasphaltmixtureperformanceatdifferentproportionofRAP,andthentakenintoaccounteconomicfactorstodeterminetheoptimalproportionofRAPinShaanxiprovince.Afterthat,thispaperanalyzedtheeffectsofdifferentdesignfactorsonthecorrelationdegreewithroadperformanceusinggraytheory,andprovidedareferencedesignforrecyclingmixture;Intermsoftechnologyimprovements,thispapercomparedtheadvantagesanddisadvantagesofvarioushotmixplantsrecyclingequipment,researchedonthetechnicalreasonsandproposedimprovementprogramswithdryingtubewallstickinglining,leafstructuredistributiontosolvetheparallel-flowdryerdrumrecycledequipmentoperatingproblems,andthenprovidedrelevantperformanceevaluationindexfortheseconddryingcylinderrecycledequipment;Intermsofconstructiontechniques,thispaperanalyzedthevariousstagesexpoundingofconstructiontechnologyofhotmixplantrecyclingmixture.Itissuggestedthatweshouldfocusonstrengtheningpre-productioncontroltoreduceRAPvariability.Atlast,thispapersummarizedandrecommendedthereasonablewholeprocessofconstructiontechniqueofhotmixplantrecycling.IIICombinationtheoreticalanalysisandlaboratorytestresults,thispaperreliedonXi-yuexpresswaypreventivemaintenanceengineering,pavedhotmixplantrecyclingtestroad,testedroadperformance,analyzedeconomicandsocialbenefits,accumulatedexperienceforhotmixplantrecycling.Theresultsshowedthatthehotmixplantrecycledasphaltpavementhasgoodperformance,significanteconomicandsocialbenefitsandwidelyapplicationprospects.Keywords:hotmixplantrecycling;proportionofRAP;roadperformance;parallel-flowdryerdrum;equipmentimprovements;constructiontechniquesIV目录第一章绪论..............................................................................................................................11.1研究背景..........................................................................................................................11.2国内外沥青路面热再生技术研究及应用概况..............................................................11.2.1国外沥青路面再生技术研究现状...........................................................................11.2.2国内沥青路面再生技术研究现状...........................................................................31.3本文研究内容及技术路线..............................................................................................51.3.1本文研究内容...........................................................................................................51.3.2技术路线...................................................................................................................5第二章旧沥青混合料再生试验研究......................................................................................72.1旧沥青混合料取样..........................................................................................................72.2旧沥青混合料组成及性能分析......................................................................................72.2.1回收沥青性能分析...................................................................................................72.2.2回收集料组成及性能分析.......................................................................................92.3沥青再生与掺量研究....................................................................................................112.3.1掺加新沥青再生原理....................................