以废胶粉和重交沥青70号为主要原料,通过掺配不同济量焦磷酸钾得到改性沥青,测其针入度、软化点、延度等性能指标.试验结果表明,采用适量焦磷酸钾改性助剂后,沥青针入度和延度明显下降,软化点提高,沥青主要性能指标得到有效改善. Using waste rubber powder and heavy asphalt No.70 as the main raw materials, the modified asphalt was obtained by blending different potassium pyrophosphate, and its properties such as penetration, softening point and ductility were measured.The test results showed that proper amount of coke After modified by potassium phosphate, the penetration and ductility of asphalt obviously decreased, the softening point increased, and the main performance indexes of asphalt were effectively improved.