就地热再生13型沥青混合料组成设计及应用  

Composition Design and Application of Hot In-place Regeneration 13 Asphalt Mixture

作　　者：梁高荣 欧锦石 罗桂银 LIANG Gao-rong;OU Jin-shi;LUO Gui-yin(Guangxi Road Construction Engineering Group Co.,Ltd.,Nanning,Guangxi,530001;Guangxi Communications Investment Technology Co.,Ltd.,Nanning,Guangxi,530007)

机构地区：[1]广西路建工程集团有限公司,广西南宁530001 [2]广西交投科技有限公司,广西南宁530007

出　　处：《西部交通科技》2019年第5期18-21,96,共5页Western China Communications Science & Technology

摘　　要：为促进广西高速公路旧沥青路面就地热再生技术的可持续发展,文章采用离心分离法对旧沥青路面SAM-13、KH-13进行抽提试验,对回收沥青添加0%、3%、5%、7%再生剂后的再生沥青及其混合料进行了评价,旧SAM-13的RAP与新拌沥青混合料按70%∶30%的比例设计,旧KH-13的RAP与新拌沥青混合料按80%∶20%的比例设计。结果表明:再生剂掺量为5%时,再生沥青及混合料的性能得到较好的改善,在再生SMA-13(KH-13)中4.75mm、2.36mm、0.075mm的通过率分别约为33%、25%、10%(42.5%、32%、7%),再生SMA-13(KH-13)的最佳油石比为6.1%(5.0%),其高温稳定性检验均>6000次/mm、冻融劈裂试验强度比均>90%,就地热再生SMA-13(KH-13)的现场空隙率≤6%,沥青路面性能良好。In order to promote the sustainable development of hot in-place regeneration technology of the old asphalt pavement in Guangxi expressways,this article uses the centrifugal separation method to extract the old asphalt pavement SAM-13 and KH-13,and evaluates the recycled asphalt after adding 0%,3%,5% and 7% regenerant and its mixtures,then,the old SAM-13 RAP and fresh asphalt mixture are designed according to 70%∶30% ratio,and the old KH-13 RAP and fresh asphalt mixtures are designed according to 80%∶20% ratio.The results show that the performance of recycled asphalt and mixture is better improved when the amount of regenerant is 5%,the pass rates of 4.75 mm,2.36 mm and 0.075 mm in regenerated SMA-13(KH-13) are respectively about 33%,25%,and 10%(42.5%,32%,7%),the best oil-stone ratio of regenerated SMA-13(KH-13) is 6.1%(5.0%),and its high-temperature stability test is all greater than 6000 times/mm,the intensity ratio of freeze-thaw splitting test is all greater than 90%,the on-site void ratio of hot in-place regenerated SMA-13(KH-13) does not exceed 6%,and the performance of asphalt pavement is good.

关 键 词：道路工程 就地热再生 级配 空隙率 动稳定度 

分 类 号：U416.217[交通运输工程—道路与铁道工程]