季冻区沥青混合料组成与路用性能研究

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1、华南理工大学硕士学位论文季冻区沥青混合料组成与路用性能研究姓名：王雪莲申请学位级别：硕士专业：建筑与土木工程指导教师：王端宜;周钟钧20061208AbstractTheasphaltconcreteroadwaswidelyappliedtothehighgraderoadsurfacebecauseofitsoneOWllmeritsuchascomfortabledrivingandeasytorepair．However,alongwiththeasphaltroadsforthevolumeoftrafficincreasesrapidly,the

2、channelingrunning，andoverloadingseriously,etc．Particularly,intheseasonalfreezenzone，thelowtemperaturecrackisverycommonly．seriouslyaffectingtheUSequalityandlifespanofpavement,andincreasingtheexpenditureofpavementmaintain．SoresearchandsolvethisproblemThepaperisaimedatthemainreasonoft

3、heasphaltpavement’destructioninthefrigidzone(thelowtemperaturecrackandthehightemperaturerut)．Fromseveralaspectdiscussingthefactorsaffectonthestabilityoflowtemperatureandhi【ghtemperature．Becausetherearesomanyfactorsaffectonthelowtemperaturecrack，Wemustusesystemicmethodsandconsiderth

4、eperformanceandstructureofmaterialandbeginwithchooseofasphalLtheoptimizeanddesignofgradation,thenfindoutthewaytosolvethelowtemperaturecrack．Thispaperjustfromtheresearchofgradationoptimizestoimprovethecrack—resistanceperformance，andatthesametimeimprovethehightemperature—stability．In

5、thedesignmethodsoftheasphaltmixture，weleadintheSuperpavemethods．ThroughattraditionalMarshalldesignmethodandSuperpavepitchthatmethodcompoundmixmaterisalcattyonwaycompareswithandanalyseswithperformance，anddiscussingtherationslityofdesignindexesandtherestrictedzone．Gradingaggregateist

6、heframeworkofmixture；itdecidestheweightandthequantityofasphaltinthemixture．Throughchoosingsuitableaggregategradationanddecidingtheoptimumasphaltcontenttodesigntheasphaltmixtureandmakingtheasphaltmixturehassmallershrinkageandbetterflexibilityisthemaincontentofthelowtemperatureasphal

7、tmixturedesign．Weanalyzefivekindsoftestinggradations’10Wtemperatureperformanceandfindoutthefourthone，whichconformstoSHRPgradationidea,hasperfectlowtemperaturecrack·resistanceperformanceandhi【ghtemperature—stability．Keywords：Asphaltmixture；Superpave；Marshallaggregategradation；lowtem

8、peratulecrack-resistancepe