Enhancing Asphalt Performance with Waste Cooking Oil and Rubber Powder Composite: A Sustainable Approach for High-Temperature Conditions

In order to investigate the effect of rubber powder on the performance of waste cooking oil modified asphalt, this paper carries out the conventional performance tests such as penetration, softening point, ductility and other tests, as well as dynamic shear rheological (Dynamic Shear Rheological (DSR)) test and high temperature mechanical properties of the matrix asphalt, modified asphalt with waste cooking oil, and modified asphalt composite with waste cooking oil/rubber powder. The test results show that the addition of rubber powder significantly improves the softening point and ductility properties of waste cooking oil-modified asphalt while increasing the degree of penetration, and the DSR test results show that the rutting factor of the waste cooking oil/rubber powder composite modified asphalt is significantly higher than that of the base asphalt and waste cooking oil-modified asphalt under the same temperature conditions, indicating that it has a better performance of high-temperature deformation resistance. Practically, this composite modification approach holds substantial potential for application in high-temperature regions, where it can improve pavement durability and reduce maintenance costs. Environmentally, the utilization of waste cooking oil and rubber powder contributes to resource recycling, mitigating the environmental burdens associated with their disposal and aligning with sustainable development goals.Therefore, improving the high-temperature performance of waste cooking oil-modified asphalt by adding rubber powder has good application prospects and practical feasibility.