Al-Khateeb Ghazi G, Alattieh Sara A, Zeiada Waleed, Castorena Cassie
Department of Civil and Environmental Engineering, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates.
Civil Engineering Department, Jordan University of Science and Technology, Irbid 3030, Jordan.
Molecules. 2024 Aug 13;29(16):3835. doi: 10.3390/molecules29163835.
Asphalt binder is the most common material used in road construction. However, the need for more durable and safer pavements requires a better understanding of asphalt's aging mechanisms and how its characteristics can be improved. The current challenge for the road industry is to use renewable materials (i.e., biomaterials not subjected to depletion) as a partial replacement for petroleum-based asphalt, which leads to reducing the carbon footprint. The most promising is to utilize biomaterials following the principles of sustainability in the modification of the asphalt binder. However, to understand whether the application of renewable materials represents a reliable and viable solution or just a research idea, this review covers various techniques for extracting bio-oil and preparing bio-modified asphalt binders, technical aspects including physical properties of different bio-oils, the impact of bio-oil addition on asphalt binder performance, and the compatibility of bio-oils with conventional binders. Key findings indicate that bio-oil can enhance modified asphalt binders' low-temperature performance and aging resistance. However, the effect on high-temperature performance varies based on the bio-oil source and preparation method. The paper concludes that while bio-oils show promise as renewable modifiers for asphalt binders, further research is needed to optimize their use and fully understand their long-term performance implications.
沥青结合料是道路建设中最常用的材料。然而，对于更耐用、更安全路面的需求，需要更好地理解沥青的老化机制以及如何改善其特性。道路行业目前面临的挑战是使用可再生材料（即不会耗尽的生物材料）部分替代石油基沥青，这有助于减少碳足迹。最有前景的是在沥青结合料改性中遵循可持续性原则利用生物材料。然而，为了了解可再生材料的应用是代表一种可靠可行的解决方案还是仅仅是一个研究想法，本综述涵盖了提取生物油和制备生物改性沥青结合料的各种技术、技术方面，包括不同生物油的物理性质、添加生物油对沥青结合料性能的影响以及生物油与传统结合料的相容性。主要研究结果表明，生物油可以提高改性沥青结合料的低温性能和抗老化性能。然而，对高温性能的影响因生物油来源和制备方法而异。本文得出结论，虽然生物油作为沥青结合料的可再生改性剂具有潜力，但仍需要进一步研究以优化其使用并充分了解其长期性能影响。
