Study on road performance of asphalt mixture based on POE/PA6 modifier

Abstract

A POE/PA6 modifier with increased reactivity was prepared using the twin-screw extrusion granulation process and added to the asphalt mixture. The effect of the POE/PA6 modifier on high-temperature stability, low-temperature anti-cracking, and water stability of asphalt mixture was studied. The results show that compared with the asphalt mixture mixed with recycled PE, the asphalt mixture mixed with POE/PA6 has nearly four times the rutting resistance of the former at 70°C and 1.0 MPa, the fracture energy and flexibility index are twice the former at -10°C, and the maximum bending strain and water stability are also significantly improved. This modifier shows a good engineering application prospect in highway construction and maintenance under high temperatures and heavy load traffic environments.