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The Combined Effect of Ultraviolet Irradiation and Temperature on Hot Mix Asphalt Mixture Aging2.90 MB
Published VersionCC BY V4.0, Open Access
Journal article
The Combined Effect of Ultraviolet Irradiation and Temperature on Hot Mix Asphalt Mixture Aging
Sustainability, Vol.14(10), pp.1-19
2022
Abstract
Reliable accelerated simulation of asphalt aging is of significant interest to asphalt researchers and pavement practitioners alike. However, current laboratory aging protocols are either based on binder aging rather than mixture aging or use dry ovens to heat asphalt mixtures, omitting the important effects of UV radiation. Binder aging cannot take into account the interactions between the binder and aggregate phases during aging, while the omission of UV radiation ignores an important catalyst in the aging process. In this study, a comparison of the effect of conventional thermal oven aging to the combined effect of heat and ultraviolet irradiation on the resilient modulus and surface texture of dense-graded asphalt field cores and gyratory-compacted samples was undertaken. Significantly higher rates of modulus increase with aging time were measured for the samples aged by both heat and ultraviolet irradiation. The gyratory-compacted samples showed more realistic results in terms of surface texture compared to the field cores, likely due to the extraction of field cores from a small area of pavement that was subjected to concentrated pneumatic tyre rolling, which was not representative of typical asphalt construction. It was concluded that using aging indices, calculated as the ratio of the aged value to the initial value, is recommended for asphalt aging investigations. The findings of this study highlight the significance and importance of developing aging protocols that combine heat, ultraviolet irradiation, and any other environmental factors that may affect the aging behaviour of asphalt mixtures.
Details
- Title
- The Combined Effect of Ultraviolet Irradiation and Temperature on Hot Mix Asphalt Mixture Aging
- Authors
- Ahmed Abouelsaad (Author) - University of the Sunshine CoastGreg White (Corresponding Author) - University of the Sunshine Coast
- Publication details
- Sustainability, Vol.14(10), pp.1-19
- Publisher
- MDPI AG
- Date published
- 2022
- DOI
- 10.3390/su14105942
- ISSN
- 2071-1050
- Copyright note
- Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99642375902621
- Output Type
- Journal article
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