Residual waste toner (WT), which is abundantly generating with modern industry, is a potential green resource that can be used as an asphalt modifier for better engineering performance and cost-saving. This study is conducted to comprehensively evaluate the feasibility of using WT as an asphalt modifier considering various rheological properties of the modified binder. Four different WT modified asphalt are prepared (with WT contents of 3%, 6%, 9%, and 12%). The properties of the modified binder were investigated through a series of rheological tests including the conventional binder specification tests (penetration, softening point, ductility, and flash point), multiple stress creep recovery (MSCR), and Bending Beam Rheometer (BBR) tests. Testing results indicated that the incorporation of WT can improve the rheological properties of the asphalt binders at low and high temperatures regardless of the WT contents. Besides, WT was shown a positive impact on fracture and bonding performances. It is noted that asphalt binders containing up to 12% of WT had a significant improvement on high-temperature, intermediate temperature fracture, low-temperature cracking, and moisture sensitivity properties. In the end, the present research shows the residual WT as a value-added modifier is a promising solution with both environmental and engineering merits.

现代工业大量产生的残余废调色剂（WT）是一种潜在的绿色资源，可用作沥青改性剂以提高工程性能并节省成本。本研究旨在综合评估使用 WT 作为沥青改性剂的可行性，同时考虑改性粘合剂的各种流变特性。制备了四种不同的 WT 改性沥青（WT 含量分别为 3%、6%、9% 和 12%）。通过一系列流变学测试研究了改性粘结剂的性能，包括常规粘结剂规格测试（渗透、软化点、延展性和闪点）、多应力蠕变恢复（MSCR）和弯曲梁流变仪（BBR）测试。测试结果表明，无论 WT 含量如何，加入 WT 都可以改善沥青结合料在低温和高温下的流变性能。此外，WT 显示出对断裂和粘合性能的积极影响。值得注意的是，含有高达 12% WT 的沥青结合料在高温、中温断裂、低温开裂和湿敏性能方面有显着改善。最后，本研究表明残留 WT 作为一种增值改性剂是一种具有环境和工程优点的有前途的解决方案。值得注意的是，含有高达 12% WT 的沥青结合料在高温、中温断裂、低温开裂和湿敏性能方面有显着改善。最后，本研究表明残留 WT 作为一种增值改性剂是一种具有环境和工程优点的有前途的解决方案。值得注意的是，含有高达 12% WT 的沥青结合料在高温、中温断裂、低温开裂和湿敏特性方面有显着改善。最后，本研究表明残留 WT 作为一种增值改性剂是一种具有环境和工程优点的有前途的解决方案。