不同級配排水瀝青混合料路用性能與透水性能研究

打開文本圖片集

中圖分類號：U414.2 文獻標(biāo)志碼：A 文章編號：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

排水瀝青路面有“頂級功能型路面”的稱號，近年來在我國高速公路中的應(yīng)用也逐漸增多。（剩余8238字）