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

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Zhou, Xinxing, Zhang, Ziyang, Wang, Haopeng ORCID: 0000-0002-5008-7322, Chen, Meizhu, Wu, Shaopeng, Xu, Song, Zhou, Xinglin, Ran, Maoping, Li, Linglin, Lu, Guangjun et al (show 1 more authors) and Ma, Zhibin (2024) Review on the properties and mechanisms of asphalt modified with bio-oil and biochar. Journal of Road Engineering, 4 (4). pp. 421-432. ISSN 2097-0498, 2773-0077

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Official URL: https://doi.org/10.1016/j.jreng.2024.06.001

Abstract

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 flow-induced 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, low-temperature crack resistance, and system compatibility.

Item Type:	Article
Uncontrolled Keywords:	31 Biological Sciences, 3106 Industrial Biotechnology
Divisions:	Faculty of Science and Engineering Faculty of Science and Engineering > School of Engineering
Depositing User:	Symplectic Admin
Date Deposited:	06 Jan 2025 09:58
Last Modified:	06 Jan 2025 09:58
DOI:	10.1016/j.jreng.2024.06.001
Related URLs:	Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3189508