太原理工大学
国家自然科学基金（5240082195）；山西省基础研究计划项目（202203021221078；20210302123082）；高性能热解炭黑复合改性沥青路面耐久性能提升技术研究 （NZ-H202312130 ）
Taiyuan University of Technology
为改善热解炭黑和C9石油树脂复合改性沥青的低温及自愈合性能，制备了废旧轮胎热解炭黑（PCB）与C9石油树脂（C9PR）的复合改性沥青. 依托复数模量、相位角、车辙因子和疲劳因子分析改性沥青样品的高、低温流变性能；采用响应面法优化改性沥青的自愈合影响因素参数. 结果表明，PCB和C9PR的添加增强了沥青的高温性能，高温下的流变特性随着C9PR用量的增加而增加；复合改性沥青的低温流变性能随C9PR用量的增加先增加后降低，且掺入2%的C9PR时低温流变性能最好；确定最佳自愈参数为损伤程度为63 %，愈合温度为48 ℃和愈合时间为44 min.
In order to improve the low-temperature performance and self-healing performance of waste tyre pyrolytic carbon black modified asphalt, a composite modified asphalt of waste tyre Pyrolytic Carbon Black (PCB) and C9 Petroleum Resin (C9PR) was prepared. Complex modulus, phase angle, rutting factor, and fatigue factor were used to analyse the high and low temperature rheological properties of the modified asphalt samples; And response surface method was used to optimize the parameters of self-healing factors affecting the modified asphalt. The results showed that the addition of PCB and C9PR enhanced the high-temperature performance of asphalt. And the rheological properties at high temperatures increased gradually with the increase of C9PR dosage; The low-temperature rheological properties of PCB/C9PR-modified asphalt showed a trend of increasing and then decreasing with the increase of C9PR dosage. And the best low-temperature rheological performance was achieved with the addition of 2% of C9PR; The optimum self-healing parameters were 63 % of the damage degree, 48 ℃ of the healing temperature and 44 min of the healing time.
