Abstract
The Demand for Effective Asphalt Additives is Growing as Road Infrastructure Ages and More Sustainable Pavement Solutions Are Needed. Tire Pyrolysis Oil (TPO) is an Example Material that Has Been Gaining Attention as a Potential Asphalt Additive. While Physical Performance Grade (PG) Temperatures Are the Predominant Performance Requirements for Asphalt Binders, Chemical Properties Are Also Significant in the Evaluation of Asphalt Performance. There is a Need to Chemically Characterize the Aging of Asphalt Binders Modified with TPO and Link Chemical Changes in Binder Components to Binder Performance. This Study Compares 2%, 4%, and 8% TPO and Asphalt Binder Blends Via Dynamic Shear Rheometry (DSR), Fourier-Transform Infrared (FTIR) Spectroscopy, and Nuclear Magnetic Resonance (NMR) Relaxometry. the Variability in the Modified Blends Was Seen by Both Physical and Chemical Testing during Four Different Blending Times (1, 60, 120, and 240 Min). after Blending, High and Intermediate PGs Were Determined by Physical Testing. the 8% TPO Blend Reduced the High PG of the Binder from 64 °C to 58 °C. This Effect Was Confirmed by Chemical Testing through Changes in Carbonyl Indices and NMR Relaxation Times. with More Oil Present in the Binder Matrix, the Binder's Resistance to Rutting Was Reduced. While the High PG Was Hindered, the Intermediate PG Remained Unchanged for All TPO Blends. This Physical Similarity Was Mirrored in Chemical Testing. the Chemical and Physical Variability Along with the Hindrance of the High PG Temperature Indicate that More Treatment May Be Needed Before TPO Can Be Effectively Applied to Asphalt Binders. This Study Suggests a Correlation between Physical Performance and Key Chemical Indicators.
Recommended Citation
R. M. Herndon et al., "Physical and Chemical Methods to Assess Performance of TPO-Modified Asphalt Binder," Applied Sciences (Switzerland), vol. 14, no. 8, article no. 3300, MDPI, Apr 2024.
The definitive version is available at https://doi.org/10.3390/app14083300
Department(s)
Chemistry
Second Department
Civil, Architectural and Environmental Engineering
Publication Status
Open Access
International Standard Serial Number (ISSN)
2076-3417
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2024 The Authors, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
01 Apr 2024
