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1、沥青路面病害成因分析及防治对策1,asphaltpavementcommondiseasesAsphaltconcreteasaroadbinder,hasbeenwidelyusedinmanycountriesintheworld,fromtheroadtothecityroad,threefromtheroadtothehighway,theroadsubbasetotheroadsurface,arewidelyusedasamaterialinroadconstructionareuse
2、dforalongtime,butbecauseofthedifferenceoftheasphaltconcretematerialitself,andtheinfluenceofthelevelofdesignandconstruction,theasphaltpavementoftenappearcracking,bleeding,loose,pitsandotherdiseases.Theappearanceofthesediseaseshasseriouslyaffectedtherun
3、ningspeedanddrivingsafety,increasedthewearofautomobilesandshortenedtheservicelifeofasphaltpavements.2,thecauseofdiseaseanalysis2.1asphaltqualityproblemsInrecentyears,nationalcityinfrastructureconstruction,cityroadprojectsandmanyconstructionfundsarelim
4、ited,sotheprincipleofeconomicalintheuseofthicknessdesign,roadstructurelayermaterial,andthetrafficvolumechange,servicelifeandnoresearchfocus.Asthehighgradeasphaltpavement,andisusedinupperlayeroftheuseofimportedasphalt,whilethesurfacelayerandthesurfacel
5、ayerismadeofasphalt,asphaltcanmeettherequirementsofspecificationfordomesticmanufacturersarenotmany,butthequantityisverylimited,cannotmeettheneedsofdomesticconstructionscale.2.2designspecificationsexistproblemsAtpresent,thenationaldesigncodeisstillusin
6、gtheflexiblepavementdeflectioncontrol,wheelaxleloadtopavementdesign100kNgroupuniaxialforstandardaxleload;theasphaltconcretesurfacelayershouldadoptallowablerebounddeflection,flexuraltensilestressandshearstressofthreeindicatorsofdesign;buildasphaltinthe
7、uppersmalltrafficbranchwhencanonlyusetheallowabledeflectiondesign;allowablerebounddeflectionandshearstressoftwoindexesofasphaltmacadamsurfacebylayerdesign.Duringthedesignperiod,thestandardaxleloadaccumulatedandconvertedtothestandardaxleloadcumulativen
8、umberasthecontrolindex.Thedesignoftheroad,atrafficsurveydata,forthecapacityofservice,withoutconsideringtheproblemofoverload,thedesignisnotaccurateaxialload,resultinginthedesignperiodofthecumulativestandardaxleloadappearsinconsistentwiththefact
