Date Approved


Embargo Period


Document Type


Degree Name

M.S. Civil Engineering


Civil and Environmental Engineering


Henry M. Rowan College of Engineering


Yusuf Mehta, Ph.D., P.E.

Committee Member 1

Cheng Zhu, Ph.D., P.E.

Committee Member 2

Daniel Offenbacker, Ph.D.


100% RAP, Asphalt Binder, Hot Asphalt Recycling, Patching Repairs, Recycled Asphalt Pavement (RAP), Rejuvenators


Pavements--Performance; Pavements--Maintenance and repair


Civil and Environmental Engineering


The goal of this study was to present a procedure for performance-related mix design of 100% recycled asphalt pavement (RAP) mixtures used in repair applications. In addition, the impact of rejuvenators (Corn Oil, Tall Oil, Modified Vegetable Oil, and Aromatic Extract) on the RAP materials' properties were also investigated on both levels (binder, and mixtures). Performance grade testing, frequency sweep test, critical temperature differential (delta Tc), and Fourier Transform Infrared Spectroscopy (FTIR) tests were conducted to evaluate the rheological and chemical properties of extracted and rejuvenated RAP binders. Afterward, asphalt pavement analyzer (APA) and indirect tensile asphalt cracking (IDEAL-CT) tests were conducted on the rejuvenated RAP mixtures to investigate its rutting and cracking performance, respectively. Finally, the shear bond between conventional HMA and the rejuvenated RAP mixtures was investigated using the interlayer shear bond strength (ISS) test. Results showed that the use of rejuvenators lowered the high and low performance grade of extracted RAP binders. Further, rejuvenators increased the rutting susceptibility of the RAP mixtures to rut depth, where the values were beyond the maximum threshold of 10mm. Rejuvenators also enhanced the cracking performance of the RAP mixture to comparable level, where CTindex values were near the threshold value of 70. It also was observed that, all mixtures showed higher interlayer shear strength (ISS) values than minimum required of 276 KPa.