摘要
【目的】为改善新型路用环保材料——生物沥青的高温性能及提高生物油的适用性,研究多聚磷酸(PPA)和不同来源的生物油复合改性沥青的性能及性能差异。【方法】采用玉米秸秆油(CSO)、厨房废油(KWO)和植物类生物油(VBO)三种常见的生物油,制备PPA改性生物沥青,并对其开展常规性能、流变性能和微观形貌试验,研究其高、低温性能和表面形态。【结果】PPA对沥青的高温性能有较大提升,三种PPA改性生物沥青的低温抗裂性能均较好;生物油的种类会影响PPA改性生物沥青的温度敏感性、高温性能和低温性能,其中PPA/CSO改性沥青的温度敏感性最高,三种PPA改性生物沥青按其高温性能由高到低排序依次为:PPA/KWO改性沥青、PPA/CSO改性沥青、PPA/VBO改性沥青;按其低温流变性能由高到低排序依次为:PPA/VBO改性沥青、PPA/CSO改性沥青、PPA/KWO改性沥青。【结论】PPA和生物油共同作用可以明显改善沥青的高、低温性能,本研究可为生物油的应用和推广提供参考,使道路工程建设更加绿色和环保。
[Purposes]This work aims to improve the deficient high-temperature performance and applicability of bio-oil,a new environmental material for pavement and determine the performance differences of polyphosphoric acid(PPA)and bio-oil composite modified asphalt,which bio-oil from different sources.[Methods]The bio-oils,corn straw oil(CSO),kitchen waste oil(KWO)and vegetable bio-oil(VBO)were used to prepare PPA modified bio-asphalt.The conventional properties,rheological behavior and SEM tests were conducted to study its high and low-temperature behavior and microstructure.[Findings]The results showed that PPA has a positive effect on the high-temperature rutting resistance of asphalt,and the three kinds of bio-oils improved the low-temperature cracking resistance.The type of bio-oil influenced the temperature sensitivity,high and low-temperature performance of asphalt.The high-temperature performance of the three PPA-modified biological bitumen was in order from high to low:PPA/KWO modified bitumen,PPA/CSO modified bitumen,PPA/VBO modified bitumen;The low-temperature rheological properties of PPA/VBO modified asphalt,PPA/CSO modified asphalt and PPA/KWO modified asphalt were in descending order.[Conclusions]The combination of PPA and bio-oil can significantly improved the high and low-temperature performance of asphalt.This study could provide a reference for applying and promoting bio-oil and make road engineering more environmentally friendly.
作者
邓亚军
琚子豪
李园葧
葛冬冬
DENG Yajun;JU Zihao;LI Yuanbo;GE Dongdong(Shenzhen Municipal Engineering Corp.,Shenzhen 518109,China;School of Traffic and Transportation Engineering,Changsha University of Science&Technology,Changsha 410114,China;Key Laboratory of Special Environment Road Engineering of Hunan Province,Changsha University of Science&Technology,Changsha 410114,China)
出处
《长沙理工大学学报（自然科学版）》
CAS
2023年第2期115-124,共10页
Journal of Changsha University of Science and Technology:Natural Science
基金
长沙理工大学特殊环境道路工程湖南省重点实验室开放基金资助项目(kfj210502)。
