The present study explores the use of nano Al₂O₃ as a potential asphalt binder modifier. The study investigates the effects of different concentrations (0%,0.5%,1% and 2% by weight of the asphalt binder) of nano Al₂O₃ on various properties of the asphalt binders. XRD analysis is used to study the amorphous/crystalline nature of the base asphalt binder and nano Al₂O₃ modified asphalt binder. The influence of different temperatures and strain rates on the viscosity of the asphalt binder is evaluated. It was seen that the asphalt binder showed a shift from Newtonian behaviour to non-Newtonian behaviour upon the addition of nano Al₂O₃. The rutting evaluation of the asphalt binders was carried out by utilising different approaches like Superpave rutting parameter, multiple stress creep and recovery test, zero shear viscosity, and creep test. Furthermore, intermediate-temperature performance and aging resistivity of the modified asphalt binders was also evaluated. Results showed that the addition of nano Al₂O₃ enhances the stiffness of the asphalt binder and improves its recovery abilities. The modified asphalt binder was found to perform well under varying stresses and sustained loading and hence showed improved permanent deformation characteristics. Fatigue performance was evaluated utilising Superpave fatigue parameter and time sweep tests, and the nano Al₂O₃ modified asphalt binders showed improved fatigue life. The addition of nano Al₂O₃ also leads to an improvement in the aging resistance of the asphalt binder. The study shows an overall improvement in high temperature, intermediate temperature, and aging resistance of the asphalt binders using nano Al₂O₃ as an asphalt binder modifier.

本研究探讨了使用纳米 Al ₂ O ₃作为潜在的沥青粘合剂改性剂。该研究调查了不同浓度（沥青结合料重量的0%、0.5%、1%和2%）纳米Al ₂ O ₃对沥青结合料各种性能的影响。XRD分析用于研究基础沥青结合料和纳米Al ₂ O ₃改性沥青结合料的无定形/结晶性质。评估了不同温度和应变速率对沥青粘合剂粘度的影响。可以看出，加入纳米Al ₂ O _{3 后}，沥青结合料表现出从牛顿行为到非牛顿行为的转变。. 采用Superpave车辙参数、多应力蠕变和恢复试验、零剪切粘度和蠕变试验等不同方法对沥青结合料进行车辙评价。此外，还评估了改性沥青结合料的中温性能和耐老化性。结果表明，纳米Al ₂ O _{3 的加入}提高了沥青结合料的刚度，提高了其恢复能力。发现改性沥青结合料在不同应力和持续载荷下表现良好，因此显示出改进的永久变形特性。使用 Superpave 疲劳参数和时间扫描测试评估疲劳性能，纳米 Al ₂ O ₃改性沥青结合料的疲劳寿命有所提高。纳米Al ₂ O _{3 的加入}也导致沥青结合料抗老化性能的提高。该研究表明，使用纳米 Al ₂ O ₃作为沥青结合料改性剂，沥青结合料的耐高温、中温和抗老化性能得到全面改善。