RAP细料掺量对高模量再生混合料性能的影响研究  

The Influence of Fine RAP Content on the Performance of High Modulus Asphalt Mixture

作　　者：庄园 马辉 谢志伟 李宁 ZHUANG Yuan;MA Hui;XIE Zhi-wei;LI Ning(Expressway Engineering Maintenance Technology Co.Ltd,Nanjing 211106,Jiangsu,China;College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,Jiangsu,China)

机构地区：[1]江苏高速公路工程养护技术有限公司,江苏南京211106 [2]河海大学土木与交通学院,江苏南京210098

出　　处：《合成材料老化与应用》2025年第1期24-28,共5页Synthetic Materials Aging and Application

基　　金：江苏交通控股有限公司科技项目(项目编号:822005516)。

摘　　要：为研究不同RAP细料掺量对高模量再生混合料性能的影响,考虑级配的可恢复程度及再生沥青性能确定了RAP细料最大掺量,设计了0%、10%、20%和30%四种RAP细料掺量的高模量再生混合料,采用单轴压缩动态模量试验、车辙试验、低温小梁弯曲试验、冻融劈裂试验及四点梁疲劳试验评价了高模量再生混合料的性能,并分析了RAP细料掺量对性能的影响规律。结果表明,利用RAP细料用于高模量沥青混合料具有可行性,且随着RAP细料掺量的增加,混合料低温性能会有一定程度的改善,但高温性能、水稳定性和抗疲劳性能会略微降低。In order to investigate the impact of various fine RAP content on the performance of high-modulus asphalt mixtures,the maximum fine RAP content was determined considering the recoverable degree of gradation and the property of recycled asphalt.Four types of high-modulus recycled asphalt mixtures with varying RAP fines contents of 0%,10%,20%,and 30%were designed and subjected to a series of comprehensive experimental methods,including uniaxial compression dynamic modulus testing,rutting test,low-temperature beam bending test,freeze-thaw splitting test,and four-point beam fatigue test.Concurrently,the influence of fine RAP content on various performance indicators were analyzed.The experimental results indicate that the utilization of fine RAP materials for the preparation of high-modulus asphalt mixtures is feasible.And with the increase of RAP fine material content,the low temperature performance of the mixture will be improved to a certain extent,but the high temperature performance,water stability and fatigue resistance will be slightly reduced.

关 键 词：再生技术 高模量沥青混合料 RAP细料 硬质沥青 路用性能 

分 类 号：U414[交通运输工程—道路与铁道工程] U418