连续级配橡胶颗粒沥青路面降噪特性的研究

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1、内蒙古农业大学博士学位论文连续级配橡胶颗粒沥青路面降噪特性的研究姓名：高明星申请学位级别：博士专业：森林工程指导教师：朱守林20090401程度较小。当车辆轮胎在橡胶颗粒沥青路面上跳跃撞击时，路面对轮胎碰撞中心的激励强度随路面厚度的增加而降低。沿行车方向看，轮胎的下落高度对轮胎激励噪声的影响具有特殊性。固定橡胶颗粒掺量的沥青路面对轮胎应力的衰减能力是有限的，超出极限时，橡胶颗粒沥青路面会失去减振降噪的优势。关键词：连续级配：橡胶颗粒；沥青混合料；降噪；有限元StudyonNoiseReductionCharacteristicso

2、fContinuousGradationRubberParticlesAsphaltPavementAbstractTrafficnoiseisanimportantsourceoftheenvironmentalnoisepollution．Withthedevelopmentoftheautomobileindustry，theproportionofthetire／roadnoiseintrafficnoiseislargerandlarger，whichhasbeengenerallyconcernedbypeople·S

3、tudyshowsthatithassignificanteffectonnoise．reductionthatchoosingsuitableroadmaterialsandpavementstructure．Drawingonrelevantresearchresultsathomeandabroad，thispaperresearchesmixingprocess，formingprocessandroadperformanceofbigrubberDarticle，Sasphaltmixtureaboutcontinuou

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5、erparticles，contentandbitumenaggregateratioarethemaintwofactorswhicheffectphysicalandmechanicalpropertiesofbigrubberparticle’sasphaltmixtureaboutcontinuousgradation，andrubberparticles’contenthasmorcinfluencethanbit℃menaggregateratio．Inthepossessofmixingandformingproce

6、ss，the．mostimpoftanttechnicalfactorsarethrowingorderofrawmaterials，formingtemperatureandstrikingtimes．⋯———～～2．FOrbigrubberparticles’asphaltmixtureofcontinuousgradation，thebestmixingandformingprocessisasfollowing：themixingtimeisseventyfive≥ccondsaftermixingasphalt．fort

7、ysecondsisusedaftermixingrubberparticlesandmixingtemperatureISonehundredandseventydegreescentigrade．Formingmixtureisdividedintotwice：mixingternperatureisonehundredandseventydegreescentigradeforthefirsttimeandhittingtimeisfiftyfouroneverysurface；thesecondmixingtemperat

8、ureiseightydegreescentigradeandhittingtimeistwentysixoneverysurface·3．Mixingbigrubberparticlesintocontinuousgradationasphalt