RAP精细分离效果评价及其再生沥青混合料性能研究  

Evaluation of RAP Refined Decomposition Effect and Study on The Performance of Recycled Asphalt Mixture

作　　者：王杰 王鹏 刘黎萍[1] WANG Jie;WANG Peng;LIU Liping(The Key Laboratory of Road and Traffic Engineering,Ministry of Education,Shanghai 210804;Road Research Center,Research Institute of Highway of Ministry of Transport,Beijing 100088)

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804 [2]交通运输部公路科学研究所道路研究中心,北京100088

出　　处：《石油沥青》2024年第1期26-32,共7页Petroleum Asphalt

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(2021-9038b)。

摘　　要：采用精细分离技术对沥青混合料回收料(RAP)进行处理,可减小RAP的变异性,提高再生沥青混合料的路用性能。通过对不同工艺处理的精细分离RAP试验,分析了精细分离RAP的矿料级配、沥青含量变化规律及变异性。采用精细分离RAP制备再生沥青混合料,研究分析了精细分离工艺对再生沥青混合料路用性能的影响。结果表明:未经过精细分离的RAP,矿料级配、沥青含量变异性较大;精细分离后的RAP,矿料级配、沥青含量的变异性明显减小,提升了RAP的稳定性;精细分离工艺有利于提升再生沥青混合料的路用性能,尤其是动稳定性和最大弯拉应变;精细分离有利于提高RAP在再生沥青混合料中的掺量,保证再生沥青混合料的质量,提升RAP在沥青路面中再生利用水平。Using refined decomposition technology to treat recycled asphalt mixture(RAP)can reduce the variability of RAP and improve the road performance of recycled asphalt mixture.Through the refined decomposition RAP test of different processes,the rule and variability of refined decomposition RAP aggregate gradation and asphalt content were analyzed.The recycled asphalt mixture was prepared by refined decomposition RAP,and the influence of refined decomposition process on the road performance of recycled asphalt mixture was analyzed.The results show that the gradation(after extraction)and asphalt content of RAP(original)without refined decomposition have great variability.The refined decomposition process reduces the variability of RAP aggregate gradation(after extraction)and asphalt content,and improves the stability of RAP and the quality of raw materials of recycled asphalt mixture.The refined decomposition process is conducive to improving the road performance of recycled asphalt mixture,especially the dynamic stability and maximum bending tensile strain.The refined decomposition process is conducive to improving the content of RAP in recycled asphalt mixture,ensuring the quality of recycled asphalt mixture,and improving the recycling level of RAP in asphalt pavement.

关 键 词：道路工程 沥青混合料回收料 精细分离 再生沥青混合料 

分 类 号：U414[交通运输工程—道路与铁道工程]