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ID:36514312
大小:2.05 MB
页数:69页
时间:2019-05-11
《混凝土吸声隔音砌块的制备研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、东南大学硕士学位论文混凝土吸声隔音砌块的制备研究姓名:张金花申请学位级别:硕士专业:材料学指导教师:高建明20060307AbstractWiththedevelopmentoftransportation,especiallythedevelopmentofhighways,thenoisepollutionbecomesmoreandmoreWOl'跎.Thenoisedamagesthehabitationanddowntownenvironmentbadly,andmakesthelivingenvironmentofcitie
2、shardly.Thenoiseabsorptionandsoundproofconcreteblockwhichhasbeenstudiedinthepaperisanewconcreteblock,ithasbetterdumbilityandgoodnoiseabsorptionabilitycomparewiththeenmnlonconcreteblock.Thestrength,mixproportions,frostresistanceandsoundabsorptionpropertiesofporousconcrete
3、havebeenstudiedabundantlyinthepaper.ThechangeofcompressivestrengthandflexuralstrengthwithdifferentW/B,differentsizesofaggregate,differenttargetvoidratioonthebasicmechanicalpropertieshavebeenstudied.Whilethechangeofcompressivestrengthandflexuralstrengthwithsilicafumeandfl
4、yashalsohavebeenstudied.Forthesoundabsorptionproperties,theinfluenceoftargetvoidrado,thesizesofaggregateandthethicknessofporousconcretetosoundabsorptioncoefficientandarithmeticmeanoftheabsorptioncoefficientshavebeenstudiedtoo.Theresearchresultsshowthatthebestrangeoftarge
5、tvoidratiois20%-25%,andthebestrangeofW/Bis0.24—0.24whensilicafumeandflyashareaddedtoporousconcrete.Butwhenpolymermodifierareaddedtoporousconcrete.thebestrangeofW/Bis0.24—0.27.Thelargestsizeofaggregateis10mm.Theporousconcretewhichmadewiththeseconditionscanget20MPastrength
6、andthearithmeticmeanoftheabsorptioncoefficientsofitislargerthan0.3.Thereale4groupsnoiseabsorptionandsoundproofconcreteblockhavebeendesignedbasedonacousticcharacteristicofporousconcreteinthepaper.Atlastthetechnicregulationshavebeendesigned.Keywords:Porousconcrete;block;Co
7、mpressivestrength;Flexuralstrength;Targetvoidratio;SoundabsorptioncoefficientⅡ第一章绪论1.1引言改革开放20多年来,我国公路交通事业发生了历史性的巨变。目前,公路交通已不再是制约国民经济增长的“瓶颈”,而成为拉动国民经济发展的主要力量。近几年来,我国的公路交通事业发展更为迅速,特别是高速公路的建设,速度惊人。1995年全国公路总里程为125.70万km,到2005年末已达到170.95万km,同期高速公路从0.2147万km发展到1.63万km。根据交通部近
8、期规划的“公路、水路交通发展三阶段战略目标”,到2010年,全国公路总里程达到180万kⅢ。其中高速公路达到3.5万k皿,占公路总里程的1.9%;二级以上公路达到36万km,占公路总里程的20%。在公路交通
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