Ji Haidong, He Dongpo, Li Bo, Lu Guanzhong, Wang Chenyu
College of Civil Engineering, Northeast Forestry University, Harbin 150000, China.
College of Civil Engineering, Lanzhou Jiao Tong University, Lanzhou 730000, China.
Materials (Basel). 2022 Apr 20;15(9):3000. doi: 10.3390/ma15093000.
Research on polyurethane-modified asphalt has become very popular. To this end, researchers have explored different ways, such as the use of polyurethane, to improve the road performance of asphalt. However, according to existing experimental research findings, it seems that the use of polyurethane alone cannot completely improve the road performance of asphalt. Therefore, the influence of nano-titanium dioxide and polyurethane on the rheological behavior and anti-ultraviolet aging properties of asphalt was studied. In this research, the rheological and microscopic tests of asphalt were conducted using Dynamic Shear Rheometer, Curved Beam Rheometer, and Fourier Infrared Spectrometer. The results show that the addition of TPU and nano-TiO to the asphalt not only improves the high- and low-temperature rheological behavior of the asphalt, but also improves the thermal oxygen resistance and UV aging resistance of the asphalt, and prolongs the use performance. Considering economic factors and environmental influences, among all the selected dosages, 4% TPU and 1% nano-TiO had the best performance.
聚氨酯改性沥青的研究已变得非常热门。为此，研究人员探索了不同的方法，比如使用聚氨酯来改善沥青的路用性能。然而，根据现有的实验研究结果，单独使用聚氨酯似乎无法完全改善沥青的路用性能。因此，研究了纳米二氧化钛和聚氨酯对沥青流变行为及抗紫外线老化性能的影响。在本研究中，使用动态剪切流变仪、弯曲梁流变仪和傅里叶红外光谱仪对沥青进行了流变和微观测试。结果表明，向沥青中添加TPU和纳米TiO₂不仅改善了沥青的高低温流变行为，还提高了沥青的耐热氧性和抗紫外线老化性能，并延长了使用性能。考虑到经济因素和环境影响，在所有选定的剂量中，4%的TPU和1%的纳米TiO₂性能最佳。
