The objective of this project was to use specially designed software to optimize the mix of recycled asphalt pavement, RAP, as a replacement for up to 40% of the aggregate in concrete mixes. UF Term Professor Mang Tia served as the principal investigator of this project. The resurfacing of asphalt roadways involves removing, or milling, the top pavement layer before retopping with fresh material. The milling process produces mountains of asphalt chips, and transportation agencies across the United States have worked to find appropriate uses for RAP.