Applicability of Superpave specification to modified asphalt

It's necessary to study on the applicability of Superpave specification to modified asphalt because the specification is developed on the unmodified asphalt and there are many factors that not been taken into account.The hypothesis and the rheology model are analyzed.It proved that the devices of Superpave could be applied to the modified asphalt, but the applicability of specification is limited. So the evaluation parameters and methods should be updated.