Muhammad Ahmad
University of Nebraska, 2023
Presents his research on
Sustainable Revitalization of Asphalt Pavements: An In-Depth Analysis of Enhancing Asphalt Binder Performance through the Application of Rheological and Molecular Dynamics Simulation Techniques
Advisor: Dr. Hamzeh F. Haghshenas
24th April 2023
3:00-6:00 PM
Whittier Research Center, 152
https://unl.zoom.us/j/5471320756
In this study, crude corn oil (CO) and soybean oil (SO) were used as recycling agent (RA) to restore the performance of a binder extracted from reclaimed asphalt pavement (RAB). The binder extracted from reclaimed asphalt pavement (RAB) was modified with 65% RAB, neat binder (PG64-28), and RA to restore the performance grade (PG). To address concerns about the long-term performance of RA, the modified binders were dosed with DLTDP and ZnDEC antioxidants to test for rheological, chemical, and moisture susceptibility analysis. The addition of antioxidant ZnDEC improved the rheological efficacy but reduced the moisture resistance. Later, the 65% RAB, PG64-28, and CO modified binders were tested for damage susceptibility and healing (H%) using VECD to observe whether the CO restores the intrinsic healing properties of binder. Use of CO improved the damage resistance and H%. Later, molecular models were prepared for 65% RAB, PG64-28, and CO modified binders to test the ability of CO to restore the rheological, damage resistance, and H% using molecular dynamics simulation technique. CO improved the density, viscosity, glass transition temperature, and healing ability of the modified binder models
More details at: https://unl.zoom.us/j/5471320756