Ph.D. in Civil Engineering
Civil and Environmental Engineering
Henry M. Rowan College of Engineering
Yusuf Mehta, Ph.D.
Committee Member 1
Cheng Zhu, Ph.D.
Committee Member 2
Gilson Lomboy, Ph.D.
Committee Member 3
Theresa Loux, Ph.D.
Asphalt, Asphalt Mixtures, FTIR-ATR, IDEAL-CT, Moisture Damage, Surface Free Energy
Asphalt; Highway engineering
Civil and Environmental Engineering | Engineering
This study investigated the effects of asphalt oxidation and testing temperature on moisture damage in asphalt mixtures, using AASHTO T283 and Surface Free Energy (SFE) testing. The study assessed the impact of three asphalt binder grades (PG 64-22, PG 76-22, and PG 52-34) and three test temperatures (ALT, AIT, and CIT) on the susceptibility to moisture damage. Additionally, three oxidation levels (OTC, STOC, and LTOC) were evaluated to determine the optimal level of oxidation and testing temperature for AASHTO T283 to detect moisture damage. Load-displacement curve parameters and IDEAL-CT were analyzed to better understand the effects of oxidation and moisture conditioning on asphalt mixtures. The study also evaluated the effects of three oxidative levels (OB, RTFO, and PAV20) on moisture damage susceptibility using SFE testing. Fourier transform infrared spectroscopy (FTIR) attenuated total reflectance (ATR) was also used to quantify the effects of oxidative conditioning on asphalt binder chemical properties. The findings suggest that asphalt mixtures are more susceptible to moisture damage at STOC and LTOC than OTC, and that oxidation and CIT have the greatest impact on moisture damage susceptibility. The study highlights the need for an alternative oxidation conditioning and testing at CIT to detect moisture damage more accurately in asphalt mixtures.
Alfalah, Ahmad, "EVALUATING THE IMPACT OF OXIDATION ON MOISTURE RESISTANCE OF ASPHALT COMPONENTS AND MIXTURES" (2023). Theses and Dissertations. 3137.