• The use of waste cooking oil as a recycling agent opens the possibility for the routine design of 60%-to-nearly-100% recycled content asphalt paving mixtures.
  • Aging susceptibility of recycled binders with waste cooking oil is higher than virgin binder.
  • Oil has a greater effect on reducing the stiffness of RAP binder than increasing its m-value.
  • Waste cooking oil tended to improve mixture workability and low temperature performance while reducing moisture and rutting resistance.
  • Selecting the optimum oil content as equal to the average oil content based on satisfying the low temperature (LT) and high temperature (HT) performance grade (PG) can assure short-term and long-term performance.