Performance experimental evaluation of compound modified asphalt by pyrophosphate and crumb rubber

In this paper, The chemic modification as grafting polymerization reactivity by several direction experiments which pyrophosphate and crumb rubber was used as additives. The function of compound modification was improved asphalt performances such as penetration, softening point, ductility. As the result shows, after modifying pyrophosphate? the softening point increase, Performance indicators of asphalt were improved significantly. It suggested the dosage bound of pyrophosphate and crumb rubber in compound modification experiments.