Aging properties and aging mechanism of activated waste rubber powder modified asphalt binder based on rheological properties and micro-characterization
作者机构：School of TransportationSoutheast UniversityNanjing 211189China School of Chemistry and Chemical EngineeringSoutheast UniversityNanjing 211189China
出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)
年 卷 期：2023年第17卷第4期
页 面：625-636页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0814[工学-土木工程]
基 金：supported by the National Natural Science Foundation of China(Grant No.51778136) the Technology Research and Development Project of China Railway(No.J2019G003) The authors would like to thank the staff at the National Demonstration Center for Experimental Road and Traffic Engineering Education(Southeast University)for their active contributions to this study.
主 题：rubber powder modified asphalt aging mechanism rheological characterization
摘 要：The research and development of high-performance pavement materials has been intensified owing to the demand for long-life pavements.This study is performed to develop a novel pavement material using waste rubber powder,waste lubricating by-product(LBP),and asphalt.Subsequently,the aging properties and aging mechanism of activated waste rubber powder modified asphalt(ARMA)are investigated based on its rheological properties and microcharacterization.The rheological results show that,compared with waste rubber powder modified asphalt(RMA),ARMA offers a higher aging resistance and a longer fatigue life.A comparison and analysis of the rheological aging parameters of ARMA and RMA show that LBP activation diminishes the aging sensitivity of ARMA.The microcharacterization result shows that the aging of ARMA may be caused by the fact that LBP-activated waste rubber powder is more reactive and can form a dense colloidal structure with asphalt.Therefore,the evaporation loss of asphalt light components by heat and the damage to the colloidal structure by oxygen during the aging process are impeded,and the thermal-oxidative aging resistance of ARMA is improved.
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