The objective of this paper was to investigate the effect of carbon nanotubes (CNTs) as binder modifier on the rutting and cracking performances of asphalt mixtures. For this purpose, the different CNTs contents (0.05, 0.1, 0.15, 0.2, and 0.25 wt%) were added into the conventional asphalt binder. The Marshall stability (MS), indirect tensile (IDT), static modulus (SM), wheel tracking (WT) test, and semi-circular bending (SCB) fracture tests were conducted to evaluate the performance resistance of CNTs-modified asphalt binder for hot mix asphalt (HMA) mixtures. The results indicated that the addition of CNTs increased rutting resistance at high temperature and cracking resistance at intermediate temperature significantly. In addition, it was found from SCB test that the strain energy release rate (Jc) of 0.1% CNTs content was 16% higher than that of the control mixture. Finally, based on the results of the laboratory test and the construction cost analysis, it can be concluded that an optimum CNTs content of 0.1% by asphalt weight may be used as additive for asphalt binder in asphalt mixtures.

本文的目的是研究作为粘合剂改性剂的碳纳米管（CNTs）对沥青混合物的车辙和开裂性能的影响。为此，将不同的CNT含量（0.05、0.1、0.15、0.2和0.25wt％）添加到常规沥青粘合剂中。进行了马歇尔稳定性（MS），间接拉伸（IDT），静态模量（SM），车轮跟踪（WT）测试和半圆弯曲（SCB）断裂测试，以评估CNTs改性沥青粘合剂的性能热混合沥青（HMA）混合物。结果表明，CNT的添加显着提高了高温下的耐车辙性和中温下的耐开裂性。另外，通过SCB测试发现应变能释放速率（Jc）为0。1％CNTs的含量比对照混合物高16％。最后，根据实验室测试结果和建设成本分析，可以得出结论，以沥青重量计，最佳CNTs含量为0.1％（重量）可以用作沥青混合料中沥青结合料的添加剂。