Investigation on Mix Design of Recycled Asphalt Pavement (RAP) Materials

Status: Complete
Report Date: 05/18/2026

Summary:

This research aims to advance our knowledge of mix design of Recycled Asphalt Pavement (RAP) materials for achieving better compaction and mechanical properties, allowing engineers to confidently increase the application of RAP materials in Minnesota. Researchers will investigate the mix design of RAP materials from two aspects: 1) design the gradation curve to study whether the concept of the maximum density line would apply to the RAP materials, and 2) study the effect of graphite nanoplatelet (GNP) on mix design of RAP, particularly on the percentage of RAP used in the mix design. The investigation will involve compaction experiments and mechanical properties experiments on different mix designs of RAP material.

Final Deliverables:

Investigation on Mix Design of Recycled Asphalt Pavement (RAP) Materials (Report #2026-21)
Investigation on Mix Design of Recycled Asphalt Pavement (RAP) Materials (Research Summary)

Related Materials:

Evaluating Recycled Asphalt Pavement Mixtures (Blog Post)

Related Research:

Project Personnel:

Principal Investigator: Jia-Liang Le

Co-Principal Investigator: Mihai Marasteanu, Mugurel Turos

Technical Liaison: Eddie Johnson

Project Coordinator: Jackie Jiran