不同级配排水沥青混合料路用性能与透水性能研究

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中图分类号：U414.2 文献标志码：A 文章编号：1005-8249（2025）02-0144-07

DO1：10.19860/j.cnki.issn1005-8249.2025.02.024

Abstract：Toacuratelydeterminethetarget voidageof asphalt mixtures，this studycomparedtheroad performanceandwater permeabilityofasphalt mixtures of variousgradesunder diferent design voidage conditionsatboth highandlow temperatures， theanticipated trends inmicro-voiddiameters forasphalt mixturesof diferentgradeswere investigated.Subsequently，a correlation was established between theexpectedvaluesof micro-voiddiametersandthe macroscopicpropertiesof asphalt mixtures.Theresultsindicatethatasvoidage increases，rutingresistanceathigh temperatures initiallydecreasesbefore increasing，whilecrackingresistanceatlow temperaturescontinuouslydiminishes．Increasingthevoidageratioandnominal maximum particle sizesignificantlyenhances the permeableperformanceof drainedasphalt mixtures.Considering the balance betweenroad performance and drainage eficiency，therecommended target voidage for drainedasphalt mixtures is 20 % to （22 21 % ．Astrong fitingrelationshipexistsbetween theexpected diameterof micro－voidsandthepermeabilitycoeficient， penetration shear strength，andlow-temperatureflexural tensilestrengthof drainedasphalt mixtures，therebyvalidating the rationalityoftherecommendedtarget voidage fromamicroscopicvoid structureperspective.theresearchresultscan provide reference for the selection of target voidage in the design of the mix ratio of drainage asphalt mixture.

Key words：porousasphalt pavement；porousasphaltmixture；voidratio；permeabilitycoeffcient；roadperformance; microscopic void structure

0 引言

排水沥青路面有“顶级功能型路面”的称号，近年来在我国高速公路中的应用也逐渐增多。（剩余8238字）