Date of Award
1-30-2017
Document Type
Thesis
Degree Name
Engineering, MSE
First Advisor
Zahid Hossain
Committee Members
Ashraf Elsayed; Paul Mixon; Zahid Hossain
Call Number
LD251 .A566t 2016 R37
Abstract
The Superpave test methods are based on unmodified asphalt binders and mixes; researchers have reported limitations of these methods in evaluating modified binders. An Atomic Force Microscope (AFM) has the potential to determine morphology and nanomechanistic properties of modified and unmodified asphalt binders. In this study, different amounts of binders recovered from four selected reclaimed asphalt pavements (RAP) are blended with a virgin Performance Grade (PG) binder and tested by following Superpave tests and AFM techniques. Binders with high RAP are found to have more rutting resistance than the virgin binder but less cracking resistance due to their brittleness. Toward improving their cracking resistance, the role of a rejuvenator is investigated and found to be effective. The nanomechanical properties are found to be related to the binder morphology and in agreement with Superpave test results. Finally, the AFM is found to be as a viable tool for characterizing asphalt binders.
Rights Management
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Rashid, A. M. Feroze, "Multiscale Mechanistic Characterization of Reclaimed Asphalt Pavements" (2017). Student Theses and Dissertations. 610.
https://arch.astate.edu/all-etd/610
