Recent developments in asphalt-aggregate separation technology for reclaimed asphalt pavement

作     者：Decheng Feng Jiwei Cao Libo Gao Junyan Yi Decheng Feng;Jiwei Cao;Libo Gao;Junyan Yi

作者机构：School of Transportation Science and EngineeringHarbin Institute of TechnologyHarbin 150090China Liaoning Provincial Transportation Investment Group Co.Ltd.Shenyang 110166China Liaoning Transportation Research Institute Co.Ltd.Shenyang 110000China 

出 版 物：《Journal of Road Engineering》 (道路工程学报（英文）)

年 卷 期：2022年第2卷第4期

页      面：332-347页

核心收录：

学科分类：0817[工学-化学工程与技术] 08[工学] 0814[工学-土木工程] 0823[工学-交通运输工程] 082301[工学-道路与铁道工程] 

基　　金：This paper was financially supported by the National Natural Science Foundation of China(No.52178420 and 51878229) Research Project of Liaoning Provincial Transportation Investment Group Co.,Ltd.(202004) Key R&D projects in Liaoning Province(No.2020JH2/10300097) 

主　　题：Road engineering Reclaimed asphalt pavement Asphalt-aggregate separation Physical separation Chemical separation Biological separation 

摘      要：Reclaimed asphalt pavement(RAP)has significant recycling value because it contains nonrenewable resources including asphalt and ***,thus far,only a small part of RAP materials can be used in the con-struction of recycled asphalt pavement,and the usage is regarded as a low-value utilization in the underlying *** of the most important reasons for this shortcoming is the problem of false particle size and pseudo gradation of RAP ***,identifying suitable asphalt-aggregate separation technology is essential for improving the utilization of RAP materials in recycled asphalt mixture and enhancing the construction quality of recycled asphalt *** address this,the paper performed a systematic review of asphalt-aggregate separation technologies for processing RAP materials and their ***,based on the composition of the asphalt mixture and the characteristics of RAP materials after aging,the key RAP separation technologies were ***,the concept,principle,and implementation methods of physical,chemical,and biological sep-aration methods of RAP materials were comprehensively ***,the advantages and disadvantages of various separation technologies were discussed by comparing them with the related technologies in the petrochemical *** application prospects of various asphalt-aggregate separation methods for RAP materials can provide a reference for upgrading and expanding solid waste recycling technology for asphalt pavement.