不同老化条件下粉煤灰沥青混合料路用性能评价

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关键词：道路工程；沥青混合料；粉煤灰；老化；路用性能

中图分类号：U415 文献标志码：A 文章编号：1005-8249（2025）02-0156-05

DOI：10.19860/j.cnki.issn1005-8249.2025.02.026

Abstract：Inordertostudytheinfluenceofflyashontheperformanceofasphalt mixtureunderdiferentagingconditions，four blendingratios wereformulatedby partiallreplacing mineral powder withflyash，andthree agingconditions were designed. The high temperature rutting test at ，the beam bending test at ，the immersion Marshall test and the freeze-thaw spliting estwereusedtosystematicallevaluatetheroad performanceof asphaltmixture with diferentflyash-slagratio.The resultsshowthat thehigh temperature performance and waterstabilityof asphalt mixturecanbeimprovedbypartiallading fly ash.There isanoptimaldosagerange，andtherearediferences intheoptimaldosagerangeofdiferent properties.Flyashwil haveanadverseefectonthelowtemperatureperformanceof asphaltmixture，andthegreaterthecontent，themoresignificant the fect.The greaterthedegreeof aging，theroad performanceof asphalt mixtureissignificantlyreduced.Whenusingflyash to improve theperformanceofasphaltmixture，thecontentoflyashshouldbedeterminedcomprehensivelyacording totheroad performance.The research findings provide a reference for the application of flyash in asphalt pavement.

Key words： road engineering； asphalt mixture; fly ash; aging; road performance

0 引言

沥青路面以其良好的行车舒适性、养护便利性及噪音小等优点，逐渐成为了高等级公路的首选路面形式[1]。（剩余5173字）