National & Local Joint Engineering Research Centre of Transportation & Civil Engineering Materials, Chongqing Jiaotong University, Chongqing 400074, China.
National & Local Joint Engineering Research Centre of Transportation & Civil Engineering Materials, Chongqing Jiaotong University, Chongqing 400074, China.
Waste Manag. 2023 Jun 15;165:159-178. doi: 10.1016/j.wasman.2023.03.035. Epub 2023 May 11.
To cope with the global climate crisis and assist in achieving the carbon neutrality, the use of biomass materials to fully or partially replace petroleum-based products and unrenewable resources is expected to become a widespread solution. Based on the analysis of the existing literature, this paper firstly classified biomass materials with potential application prospects in pavement engineering according to their application and summarized their respective preparation methods and characteristics. The pavement performance of asphalt mixtures with biomass materials was analyzed and summarized, and the economic and environmental benefits of bio-asphalt binder were evaluated. The analysis shows that pavement biomass materials with potential for practical application can be divided into three categories: bio-oil, bio-fiber, and bio-filler. Adding bio-oil to modify or extend the virgin asphalt binder can mostly improve the low temperature performance of asphalt binder. Adding styrene-butadienestyrene (SBS) or other preferable bio-components for composite modification will have a further improved effect. Most of the asphalt mixtures prepared by using bio-oil modified asphalt binders have improved the low temperature crack resistance and fatigue resistance of asphalt mixtures, but the high temperature stability and moisture resistance may decrease. As a rejuvenator, most bio-oils can restore the high and low temperature performance of aged asphalt and recycled asphalt mixture, and improve fatigue resistance. Adding bio-fiber could significantly improve the high temperature stability, low temperature crack resistance and moisture resistance of asphalt mixtures. Biochar as a bio-filler can slow down the asphalt aging process and some other bio-fillers can improve the high temperature stability and fatigue resistance of asphalt binders. Through calculation, it is found that the cost performance of bio-asphalt has the ability to surpass conventional asphalt and has economic benefits. The use of biomass materials for pavements not only reduces pollutants, but also reduces the dependence on petroleum-based products. It has significant environmental benefits and development potential.
为应对全球气候危机并助力实现碳中和，生物质材料有望被广泛应用于替代石油基产品和不可再生资源，从而充分或部分发挥其作用。本文基于对现有文献的分析，首先根据生物质材料在路面工程中的应用对其进行分类，并对其各自的制备方法和特点进行了总结。分析和总结了含有生物质材料的沥青混合料的路面性能，并评估了生物沥青结合料的经济和环境效益。结果表明，具有实际应用潜力的路面生物质材料可分为生物油、生物纤维和生物填料三类。生物油改性沥青可用于改善或延长原沥青的低温性能，添加苯乙烯-丁二烯-苯乙烯（SBS）或其他优选的生物组分进行复合改性可进一步提高其低温性能。用生物油改性沥青制备的大多数沥青混合料都提高了沥青混合料的低温抗裂性和疲劳性能，但高温稳定性和水稳定性可能会降低。作为一种再生剂，大多数生物油可恢复老化沥青和再生沥青混合料的高低温性能，提高疲劳性能。生物纤维的添加可显著提高沥青混合料的高温稳定性、低温抗裂性和水稳定性。生物炭作为生物填料可以减缓沥青老化过程，而其他一些生物填料可以提高沥青结合料的高温稳定性和疲劳性能。通过计算发现，生物沥青的性价比具有超越传统沥青的能力，具有经济效益。生物质材料在路面中的应用不仅减少了污染物的排放，还减少了对石油基产品的依赖，具有显著的环境效益和发展潜力。
