混凝土吸声隔音砌块的制备研究

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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