The surface temperature of asphalt pavement can be exceedingly high in summer while the heat conserved in the pavement tends to be rapidly lost in winter, which leads to rutting and cracking distresses, respectively. Thermochromic material with its ability to change colour subject to temperature variations, was used in this study to control road surface temperature. Three types of thermochromic materials including the red, blue, and black ones, were applied to the 70# and SBS asphalts at the contents of 5% by weight to prepare 70#+ and SBS+ asphalts, respectively. Different test methods were employed to verify the high-temperature, low-temperature, water stability, and fatigue performances of the 70#+ and SBS+ asphalt mixtures. The study reveals thermochromic material can be used to reduce the road surface temperature in summer, and to delay the reduction of road temperature in winter. 70#+ and SBS+ thermochromic asphalt mixtures have a significant improvement in high-temperature performance. The low-temperature crack resistance of the mixture is improved after the blend of blue and black thermochromic materials, while the opposite is true after mixing with the red thermochromic one. The water stability of the thermochromic mixtures is slightly better than that of base asphalt. Furthermore, the observed fatigue performance of SBS + Blue asphalt mixture is remarkably improved. Therefore, considering the overall balance of performance improvements, the blue thermochromic material is recommended in this study.

沥青路面的表面温度在夏季会非常高，而在冬季，路面中保存的热量往往会迅速散失，分别导致车辙和开裂。热致变色材料具有随温度变化改变颜色的能力，在本研究中用于控制路面温度。将红色、蓝色和黑色三种热致变色材料以5%的重量比分别应用于70#和SBS沥青，分别制备70#+和SBS+沥青。采用不同的试验方法验证了70#+和SBS+沥青混合料的高温、低温、水稳定性和疲劳性能。研究表明热致变色材料可用于降低夏季路面温度，并延缓冬季道路温度的降低。70#+和SBS+热致变色沥青混合料对高温性能有显着改善。蓝色和黑色热致变色材料混合后，混合物的低温抗裂性得到改善，而与红色热致变色材料混合后则相反。热致变色混合物的水稳定性略好于基础沥青。此外，观察到的 SBS + Blue 沥青混合料的疲劳性能显着提高。因此，考虑到性能改进的整体平衡，本研究推荐使用蓝色热致变色材料。蓝色和黑色热致变色材料混合后，混合物的低温抗裂性得到改善，而与红色热致变色材料混合后则相反。热致变色混合物的水稳定性略好于基础沥青。此外，观察到的 SBS + Blue 沥青混合料的疲劳性能显着提高。因此，考虑到性能改进的整体平衡，本研究推荐使用蓝色热致变色材料。蓝色和黑色热致变色材料混合后，混合物的低温抗裂性得到改善，而与红色热致变色材料混合后则相反。热致变色混合物的水稳定性略好于基础沥青。此外，观察到的 SBS + Blue 沥青混合料的疲劳性能显着提高。因此，考虑到性能改进的整体平衡，本研究推荐使用蓝色热致变色材料。观察到 SBS + Blue 沥青混合料的疲劳性能显着提高。因此，考虑到性能改进的整体平衡，本研究推荐使用蓝色热致变色材料。观察到 SBS + Blue 沥青混合料的疲劳性能显着提高。因此，考虑到性能改进的整体平衡，本研究推荐使用蓝色热致变色材料。