The purpose of this study aims at investigating the impact of multi-walled carbon nanotubes (MWCNT’s) on the properties of low viscosity grade asphalt binder. Asphalt binder with viscosity grade-10 is selected as the control binder and later it is modified with different percentages of MWCNT’s (0.5–2.5%). Penetration, softening point, ductility and rotational viscosity test were employed for evaluating the effect of MWCNT’s on basic physical properties of modified asphalt binder. Dynamic Shear Rheometer (DSR) is used for evaluating the rheological properties of the base and modified bitumen, for both aged and unaged bitumen. Based on the conventional and basic rheological tests, it was seen that the addition of MWCNT’s improved the high-temperature performance of modified bitumen. Multiple Stress Creep and Recovery (MSCR) test results revealed that the addition of MWCNT’s improved the creep and recovery of modified binders for both stress intensities (0.1 kPa and 3.2 kPa) which confirms that the modified binder is more rut resistant. Moreover, it was observed that there was a significant improvement in the aging resistance of the asphalt binder due to addition of MWCNTs. However low temperature performance of MWCNTs was not encouraging. Also, MWCNTs addition to asphalt binder was found to be stable under high-temperature storage condition. Overall, there is a significant amount of improvement using MWCNTs in the base asphalt binder.

本研究的目的旨在研究多壁碳纳米管 (MWCNT) 对低粘度级沥青粘合剂性能的影响。选择粘度等级为 10 的沥青粘合剂作为控制粘合剂，然后用不同百分比的 MWCNT（0.5-2.5%）对其进行改性。采用渗透、软化点、延展性和旋转粘度测试来评估多壁碳纳米管对改性沥青粘合剂基本物理性能的影响。动态剪切流变仪 (DSR) 用于评估老化和未老化沥青的基础沥青和改性沥青的流变特性。基于常规和基本流变测试，可以看出添加多壁碳纳米管改善了改性沥青的高温性能。多重应力蠕变和恢复 (MSCR) 测试结果表明，加入 MWCNT 后，改性粘合剂在两种应力强度（0.1 kPa 和 3.2 kPa）下的蠕变和恢复都得到了改善，这证实了改性粘合剂更耐车辙。此外，观察到由于添加多壁碳纳米管，沥青结合料的抗老化性能有显着改善。然而，多壁碳纳米管的低温性能并不令人鼓舞。此外，发现添加到沥青粘合剂中的 MWCNTs 在高温储存条件下是稳定的。总体而言，在基础沥青粘合剂中使用多壁碳纳米管有显着的改进。此外，观察到由于添加多壁碳纳米管，沥青结合料的抗老化性能有显着改善。然而，多壁碳纳米管的低温性能并不令人鼓舞。此外，发现添加到沥青粘合剂中的 MWCNTs 在高温储存条件下是稳定的。总体而言，在基础沥青粘合剂中使用多壁碳纳米管有显着的改进。此外，观察到由于添加多壁碳纳米管，沥青结合料的抗老化性能有显着改善。然而，多壁碳纳米管的低温性能并不令人鼓舞。此外，发现添加到沥青粘合剂中的 MWCNTs 在高温储存条件下是稳定的。总体而言，在基础沥青粘合剂中使用多壁碳纳米管有显着的改进。