Journal article
Review of Asphalt Mixture Ravelling Mechanisms, Causes and Testing
International Journal of Pavement Research and Technology, Vol.15, pp.1448-1462
2022
Abstract
Ravelling, which is defined as aggregate loss from an asphalt surface, is one of the modes of failure of flexible pavements in both highways and airport pavement surfaces. Ravelling is more commonly noticed in open graded friction coarse, but also occurs in other asphalt mixtures, particularly in airport pavements, where age-related distress results from severe bituminous mastic erosion. This paper presents the state of art for researchers who are interested in the ravelling phenomenon. First, ravelling terminology and the different mechanisms are defined. Second, based on the understanding of different mechanisms of ravelling, factors that may cause or accelerate ravelling are discussed, including traffic loads, bitumen aging and bitumen–aggregate interface adhesion. Third, different laboratory testing procedures to accelerate and measure ravelling are described. The most important findings of this review can be summarised in three points. First, the major factors that affect ravelling progression are related to the failure of the bonds between aggregate and bitumen, as a consequence of aging or other factors that affect the strength of the interface bond. Second, ravelling testing devices used in previous research are all scuffing-based devices, but the samples must be pre-aged prior to scuffing to provide a more realistic scenario of ravelling progression. Third, efforts towards increasing ravelling resistance, including binder additives, adhesion promoters and self-healing techniques, require further study to evaluate the most efficient options.
Details
- Title
- Review of Asphalt Mixture Ravelling Mechanisms, Causes and Testing
- Authors
- Ahmed Abouelsaad (Author) - University of the Sunshine Coast, QueenslandGregory White (Corresponding Author) - University of the Sunshine Coast, Queensland
- Publication details
- International Journal of Pavement Research and Technology, Vol.15, pp.1448-1462
- Publisher
- Springer Singapore
- DOI
- 10.1007/s42947-021-00100-7
- ISSN
- 1996-6814
- Organisation Unit
- School of Science, Technology and Engineering; University of the Sunshine Coast, Queensland
- Language
- English
- Record Identifier
- 99575308902621
- Output Type
- Journal article
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- Construction & Building Technology
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- Materials Science, Multidisciplinary
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