This study aims to investigate the effect of Iran rock asphalt (IRA) on the rheological performance of waste bio-oil modified asphalt (WBMA). Three kinds of WBMA with bio-oil origins including soybean oil residue, castor oil residue, and waste cooking oil residue were blended with different dosages of IRA. The high-temperature performance of the three blended asphalt binders was evaluated using the temperature sweep test and multiple stress creep recovery (MSCR) test. The effect of IRA on the fatigue performance and low-temperature cracking resistance of the three WBMAs was evaluated using the linear amplitude sweep (LAS) test and the bending beam rheometer (BBR) test. A gel permeation chromatography (GPC) test was conducted to further understand the contribution of IRA to the overall rheological performance of different WBMAs. Results indicated that the high-temperature performance of the three WBMAs was enhanced significantly with the increase of IRA content. The predicted fatigue life from the LAS test showed that the incorporation of IRA extended the fatigue life of the three WBMAs at a lower strain level, while this effect was not profound at a higher strain level. Results from BBR test showed that IRA may increase the risk of low-temperature cracking and that the dosage of IRA should be limited to fulfill the requirements of the low-temperature performance. The GPC analysis revealed that the enhanced high-temperature performance and reduced low-temperature cracking resistance of WBMAs modified with IRA was mainly a result of the increased asphaltene concentration.

本研究旨在研究伊朗岩沥青（IRA）对废弃生物油改性沥青（WBMA）流变性能的影响。将大豆油渣、蓖麻油渣和废食用油渣三种生物油来源的WBMA与不同剂量的IRA混合。使用温度扫描试验和多应力蠕变恢复（MSCR）试验评估了三种混合沥青结合料的高温性能。使用线性振幅扫描 (LAS) 测试和弯曲梁流变仪 (BBR) 测试评估 IRA 对三种 WBMA 的疲劳性能和低温抗裂性的影响。进行了凝胶渗透色谱 (GPC) 测试以进一步了解 IRA 对不同 WBMA 的整体流变性能的贡献。结果表明，随着IRA含量的增加，三种WBMA的高温性能显着增强。LAS 测试预测的疲劳寿命表明，IRA 的加入延长了三种 WBMA 在较低应变水平下的疲劳寿命，而这种影响在较高应变水平下并不明显。BBR试验结果表明IRA可能会增加低温开裂的风险，应限制IRA的用量以满足低温性能要求。GPC 分析表明，IRA 改性 WBMA 的高温性能增强和低温抗裂性降低主要是沥青质浓度增加的结果。