The performance characteristics of bitumens and Stone Matrix Asphalt (SMA) Mixtures modified by Nano TiO₂ were evaluated through this study. For investigating the physical and rheological behavior of bitumens, penetration grade, softening point, ductility, linear Amplitude Sweep (LAS), Rotational Viscosity (RV), Dynamic Shear Rheometer (DSR), Bending Beam Rheometer (BBR), Multiple Stress Creep Recovery (MSCR) and storage stability tests were implemented. In this study, the steel slag was replaced with a coarse portion of aggregate Moreover, Resilient modulus (Mr), Indirect tensile strength (ITS), dynamic creep, wheel track, moisture susceptibility, and Four-Point Beam Fatigue (FPBF) tests were implemented to evaluate the properties of asphalt mixtures. The physical and chemical properties of aggregates were investigated to evaluate their influence on the behavior of mixtures. LAS and MSCR tests result revealed that the utilization of Nano TiO₂ causes an enhanced fatigue life and rutting properties of binders. Based on results, utilization of Nano TiO₂ enhances the Mr, rutting properties, ITS, fracture energy, and intermediate temperature behavior of specimens. Also, based on results, replacing a coarse portion of the aggregate skeleton by steel slag aggregate result in improving the rutting resistance of mixtures. At the same time it leads to decrease MR, ITS, TSR, and fatigue resistance of mixtures.

纳米TiO ₂改性沥青与石基沥青（SMA）混合料的性能特征。通过这项研究进行了评估。用于研究沥青的物理和流变行为，渗透等级，软化点，延展性，线性振幅扫描（LAS），旋转粘度（RV），动态剪切流变仪（DSR），弯曲束流变仪（BBR），多次应力蠕变恢复（已执行MSCR）和存储稳定性测试。在这项研究中，钢渣被骨料中的一小部分所代替。此外，还进行了弹性模量（Mr），间接拉伸强度（ITS），动态蠕变，轮迹，湿气敏感性和四点束疲劳（FPBF）测试。用于评估沥青混合料的性能。研究了骨料的物理和化学性质，以评估其对混合物行为的影响。LAS和MSCR测试结果表明，纳米TiO的利用₂导致粘合剂的疲劳寿命和车辙性能提高。根据结果​​，利用纳米TiO ₂可以增强样品的Mr，车辙性能，ITS，断裂能和中间温度行为。另外，基于结果，用钢渣骨料代替骨料骨架的粗大部分可以提高混合物的耐车辙性。同时，它会降低MR，ITS，TSR和混合物的抗疲劳性。