Self-healing performance of asphalt mixtures through heating fibers or aggregate

It is concluded that asphalt mixtures containing steel fibers or steel slags could be healed with appropriate heating methods. It is also indicated that the healing performance of samples with microwave heating was a little better than the healing performance of steel fiber modified asphalt mixture with induction heating. The steel slag asphalt mixture showed a better performance of healing with the microwave as the temperature distribution was more uniform. Furthermore, the locally overheating and temperature uneven distribution remained to be big problems in the self-healing performance of asphalt mixtures in practical application.