Review on the properties and mechanisms of asphalt modified with bio-oil and biochar  

作　　者：Xinxing Zhou Ziyang Zhang Haopeng Wang Meizhu Chen Shaopeng Wu Song Xu Xinglin Zhou Maoping Ran Linglin Li Guangjun Lu Zhibin Ma 

机构地区：[1]State Environmental Protection Key Laboratoryof Efficient Utilization Technologyof Coal Waste Resources,Institute of Resources and Environmental Engineering,Shanxi University,Taiyuan 030031,China [2]Department of Civil and Environmental Engineering,University of Liverpool,Liverpool L693GH,UK [3]State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China [4]College of Civil Engineering,Fuzhou University,Fuzhou 350116,China [5]School of Automobile and Traffic Engineering,Wuhan University of Science and Technology,Wuhan 430081,China [6]Nottingham Transportation Engineering Centre,University of Nottingham,Nttingham NG72RD,UK

出　　处：《Journal of Road Engineering》2024年第4期421-432,共12页道路工程学报（英文）

基　　金：supported by the National Natural Science Foundation of China (No. 52378456, No. W2421062, No. 52008235);the Special Foundation of Achievements Transformation Guide of Department of Science and Technology of Shanxi Province (No. 202204021301075, No.201804D131034);the Patent Transformation Project of Shanxi Province(No. 202306009);Shanxi Graduate Education Innovation Plan(2024SJ027)。

摘　　要：Bio-asphalt has a great application prospect in the replacement of petroleum-based asphalt to pave and maintain asphalt pavement. However, the problems of flow-induced crystallization and phase separation caused by flowinduced crystallization had severely restricted its application. This paper describes the progress of research on preparation, property evaluation and phase separation mechanism of bio-asphalt. The advantages and disadvantages of preparation methods of bio-asphalt are states. The fundamental physical and rheological properties of bio-asphalt are investigated, especially for flow-induced crystallization. There exists obvious flow-induced crystallization because bio-asphalt is rich in waxes that crystallize easily. Owing to the existence of excess biochar,bio-asphalt appears phase separation. A brief review of the effect of bio-oil and biochar on asphalt volatile organic compounds(VOCs) is presented. Research find that bio-oil/biochar are not only replenish the light components of asphalt, but also improve the flow-induced crystallization and phase separation of bio-asphalt. There exists synergistic effect of biochar and bio-oil in asphalt modification. Moreover, biochar can improve the durability of bio-oil modified asphalt, but excessive addition of biochar to bio-oil modified asphalt can cause phase separation.Adding an appropriate amount of bio-oil and biochar to asphalt can improve its high-temperature resistance, lowtemperature crack resistance, and system compatibility.

关 键 词：Bio-asphalt BIO-OIL BIOCHAR Induced crystallization Phase separation mechanism Volatile organic compounds 

分 类 号：U414[交通运输工程—道路与铁道工程]