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1、ATB—25沥青混合料级配优化第36卷,第6期2011年12月公路工程HighwayEngineeringVo1.36,No.6Dec.,2011ATB一25沥青混合料级配优化钟梦武,蒋功雪,孙超林,(1.湖南省交通科学研究院,湖南长沙410015;410219)朱沅峰.,罗志高,袁海雅,吴开2.湖南省长湘高速公路建设开发有限公司,湖南长沙[摘要】以混合料骨料填充理论为基础,运用理论计算的手段给出了高温多雨大交通量高速公路沥青路面下面层用ATB一25的合理级配范围,并且根据生产实践对级配进行了优化.与规范规定的级配范围相比,优化后的ATB-25混合料级配范围,适当提高了级配下限的细集料比
2、例,保证了ATB一25混合料的密实性;且大幅度减少了级配上限细集料比例,使ATB-25混合料始终处骨架密实结构,提高了ATB一25混合料的高温抗车辙性能.同时,ATB-25矿料级配骨架密实结构理论分析与试验验证表明,考虑正常的施工偏差,优化后的级配范围始终处于骨架密实结构,高温稳定性和水稳性能可以得到保证,可以应用在我国高温多雨大交通量高速公路的下面层中.[关键词]道路工程;ATB-25混合料;级配优化;骨架密实结构[中图分类号]U416.217[文献标识码]A[文章编号】1674—0610(2011)06—0001—05OptimizationofAggregateGradationf
3、orATB-25AsphaltMixtureZHONGMengwu,JIANGGongxue.,SUNChaolin,ZHUYuanfeng,LUOZhigao,YUANHaiya,WUKai(1.HunanCommunicationsResearchInstitute,Changsha,Hunan410015,China;2.HunanChangx-iangExpresswayConstructionandDew~lopmentCo.,Ltd,Changsha,Hunan410219,China)[Abstract]Baseonthetheoryoffillingaggregatemi
4、xture,thispapergivesareasonablegradationrangeofATB一25mixtureusedinlowel.layerbelowthehighwaywhichisinhightemperature,rainyandhightrafficbymeansoftheoreticalcalculations,andoptimizesthegradationaccordingtoproductionprac-tice.Comparingtothespecificationofthegradationrange,thedifferencesbetweentheop
5、timizedATB-25mixturegradationarethatthelowerlimitofaggregategradationappropriatelyincreasethefineaggregateratio,ensuringthedensityofATB一25raixture.Whiletheupperlimitofaggregategradationsubstantiallyreducetheproportionoffineaggregate,makingtheATB一25mixturealwaysattheskeletondensestructureandimprov
6、ingATB一25mixture,sperformanceofresistingruttinginhightemperature.Meanwhile,theskeletondensestructuretheoryandexperimentalverificationofATB-25aggregategradationshowsthatconsideringthedeviationofthenormalconstruction,theoptimizedgradationrangeisalwaysintheskele-tondensestructure,whosehightemperatur
7、estabilityandwaterstabilitypropertiescanbeguaranteed.Therefore,itcanbeusedinlowerlayerbelowthehighwaywhichisinhightemperature,rainyandhightraffic.[Keywords]roadengineering;ATB-25mixture;optimizationofaggregategradation
