Relationship between Rheological Indices and Cracking Performance of Virgin, Recycled, and Rejuvenated Asphalt Binders and Mixtures
Long-term cracking performance of asphalt mixtures is heavily influenced by asphalt binder rheology, and changes in binder stiffness, ductility, and aging condition significantly affect the cracking resistance of the corresponding asphalt mixture. This study evaluated the effectiveness of several common and recently developed binder rheological indices in capturing the effects of binder performance grade (PG) and source, recycled binder content, recycling agent (rejuvenator) dose, and long-term aging. These binder rheological indices included the Superpave intermediate-temperature PG (PGI), the Glover-Rowe (G-R) parameter, the crossover temperature (Td?=?45°), the rheological index (R-value), and ?Tc. This study also directly compared the binder rheological indices with the cracking performance of corresponding asphalt mixtures to explore possible correlations and their robustness. Asphalt mixture cracking performance was evaluated using the Illinois Flexibility Index Test (I-FIT) for intermediate-temperature cracking, and the disk-shaped compact tension (DCT) test and the uniaxial thermal stress and strain test (UTSST) for low-temperature cracking.Results indicated that all the binder rheological indices (except PGI) consistently captured the effects of binder blend composition and proportions and aging condition, with a few exceptions. Results also showed that the G-R parameter, the crossover temperature (Td?=?45°), and ?Tc had the best correlation to asphalt mixture and field core cracking performance as compared with other rheological indices (PGI and R-value), with ?Tc demonstrating the overall best correlation to mixture cracking performance.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
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Supplemental Notes:
- This paper does not constitute a standard or specification, nor is it intended for design, construction, bidding, contracting, or permit purposes. Any opinions, findings, conclusions, or recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of NCHRP. © National Academy of Sciences: Transportation Research Board 2021.
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Authors:
- Kaseer, Fawaz
- Martin, Amy Epps
- Arámbula-Mercado, Edith
- Publication Date: 2021-9
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: pp 93-109
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Serial:
- Transportation Research Record: Journal of the Transportation Research Board
- Volume: 2675
- Issue Number: 9
- Publisher: Sage Publications, Incorporated
- ISSN: 0361-1981
- EISSN: 2169-4052
- Serial URL: http://journals.sagepub.com/home/trr
Subject/Index Terms
- TRT Terms: Aging (Materials); Asphalt mixtures; Binder content; Bituminous binders; Cracking; Laboratory tests; Recycled materials; Rheological properties
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 01763715
- Record Type: Publication
- Report/Paper Numbers: TRBAM-21-00259
- Files: TRIS, TRB, ATRI
- Created Date: Feb 4 2021 10:57AM