RAP掺量对厂拌热再生沥青混合料路用性能的影响  

Effect of RAP content on road performance for factory-mixed heat regenerated asphalt mixture

作　　者：张丛 唐文洋 张轩铭 陈良锐 何俊雄 ZHANG Cong;TANG Wenyang;ZHANG Xuanming;CHEN Liangrui;HE Junxiong(CMCU Engineering Co.,Ltd,Chongqing 400041,China)

机构地区：[1]中机中联工程有限公司,重庆400041

出　　处：《工程建设》2025年第3期8-11,17,共5页Engineering Construction

摘　　要：为探究RAP掺量对厂拌热再生沥青中路用性能的影响,通过配合比设计确定不同掺量条件下的最佳沥青用量,并对其主要路用性能进行试验分析。结果表明:1)再生沥青混合料动稳定系数随RAP掺量增加而增加,当掺量由20%增加至50%时,动稳定度增加47.1%;2)在RAP掺量由20%增加至50%过程中,再生沥青混合料弯拉强度增长20.16%,但弯拉应变降低31.37%,劲度模数增加79.94%,且掺量超过40%时,低温抗裂性能不再满足规范要求;3)RAP掺量会降低再生沥青混合料的水稳定性,其由40%增加至50%过程中,残留稳定度比降低7.94%。本文成果可为再生沥青混合料在公路路面工程中的应用提供借鉴与参考。In order to explore the effect of RAP content on the road performance of plant-mixed heat recycled asphalt,the optimal asphalt under different conditions is determined by mix ratio design,and the main road performance are experimentally analyzed.The results show that:1)The dynamic stability coefficient of recycled asphalt mixture increases with the increase of RAP content,and when the content increases from 20%to 50%,the dynamic stability increases 47.1%;2)In the process of increasing the RAP content from 20%to 50%,the tensile strength of the recycled asphalt mixture increases 20.16%,but the tensile strain decreases 31.37%,the stiffness modulus increases 79.94%,and the low-temperature crack resistance no longer meets the requirements of the specification when the content exceeds 40%.3)The RAP content will reduce the water stability of the recycled asphalt mixture,and the residual stability ratio reduces 7.94%when the content is increased from 40%to 50%.The results can provide a certain reference for application of recycled asphalt mixture in highway pavement engineering.

关 键 词：厂拌热再生沥青 RAP掺量 路用性能 配合比设计 

分 类 号：U416.26[交通运输工程—道路与铁道工程]