利用淤污泥集料制备高速公路声屏障降噪材料的研究

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1、武汉理工大学硕士学位论文利用游污泥集料制备高速公路声屏障降噪材料的研究姓名：郭凯申请学位级别：硕士专业：材料学导教师：胡曙光20100501AbstractReducingtheinfluenceoftrafficnoiseondailylifehasbeenthemaingoalinconstructionanddesignofhighway.Highwaythathasbeenbuiltandisbuildinghasbeguntousesoundbarricadeasamethodofreducingtrafficnoise.However,thematerialsarebadtoenv

2、ironment,costmuchandhavelowdurability.ThisarticleisbasedonprogramsforscienceandtechnologydevelopmentoftransportdepartmentinHubeiprovince"researchonusingsiltsludgeaggregatestoproducesoundbarricadeinspeedway".InvestigatetheCompositionofsludge,theproducingtechniqueandperformanceofaggregatewasstudied,ra

3、isetheideaofusingbakingsludgelightaggregatetoproducesoimd-barricading.Throiighresearchonmechanismofactionofsoundbarricadeandcombinedwithcharactersofsludgeaggregate,thedesignofsound-barricadingproductionwasraised.Theoryofsoundwaveoftransmissionintubulewasunderdeepinvestigation,combinedwithdense-packi

4、ngstructuralcharactersofaggregate,modeIbetweensound-absorbingfrequencyandaggregateparticlesizewasestablished:accordingtoanalysisontransmissionthroughintubule,thesmallestradiusrelatedtosound-absorbingpeakwascalculated.Cement-basedmaterialsareporousstructurewithaggregates'co-connection.Supposedthatagg

5、regatesarethesameradius,theareaofholebetweenaggregatescanbecalculatedaccordingtoparticlesizeofaggregateandclose-packingstructure.Whenparticlesizeiscomparativelysmall,theholecanbeseenasroundhole.Therefore,theradiuscanbeapproximativelycalculated.Sinceholeinmaterialsareconnected,itcanbesupposedthatthes

6、eholesarecylindricaltubule.Finally,thecalculatedradiusistheradiusduringtransmittingandtheoreticrelationshipamongaggregateradius,tubuleradiusandsound-absorbingpeakratehasbeenestabUshed.Accordingtothistheory,theareaofaggregategrainsizeofporousmaterialswasfixed.Asnoiseratefrequencyinhighwayisconcentrat

7、edin800~1200Hz,relativeaggregategradationis1.18~2.36mmandtheaveragesound-absorbingcoefficientisashighas0.94.ThroughcomparisionVofsound-absorbingperformance,strengthanddurabilitybetweennoise-reducingma