Abstract
In Japan, recycling of asphalt mixtures has been practiced for more than 40 years. Since the mixing ratio of recycled aggregate is increasing every year, use of asphalt mixtures containing repeatedly recycled aggregate is expected to increase. However, sufficient knowledge regarding the repeated recycling has not been accumulated, and no clear understanding of the changes has been established. In this study, asphalt bitumen was aged in a laboratory and then applied a rejuvenator to restore its penetration in order to understand the property changes occurring in repeatedly aged and recycled asphalt bitumen and asphalt mixtures. This process was repeated multiple times and thereby an understanding of the properties of recycled asphalt materials was gained. In the results, although recycled asphalt bitumen recovered its penetration, its softening point shifted to a higher-temperature range in third recycling. Ductility only reached a level less than half of the initial ductility even after the first recycling process. Moreover, it was revealed that ductility exhibited almost no improvement in and after third recycling. In the black diagram curves from the DSR test, the phase angle transitioned to a smaller value range when asphalt bitumen progressed to recycle three times and five times.
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References
Japan Asphalt Mixture Association: Annual Report on Asphalt Mixtures (2016)
Japan Road Association: Handbook on Pavement Survey and Test Methods, June 2007
Kawashima, Y., Nitta, H., Kawakami, A., Nishizaki, I.: Evaluation of the chemical properties of repeatedly recycled asphalt binder. In: The 32nd Japan Road Conference, vol. 3056, October 2017
Ministry of Land, Infrastructure, Transport and Tourism: Annual Report on Road Statistics 2016 (2016). http://www.mlit.go.jp/road/ir/ir-data/tokei-nen/index.html. Accessed 26 Apr 2018
Yamaguchi, K., Sasaki, I., Meiarashi, S.: The aging of asphalt materials by ultraviolet-rays radiation and the effects of carbon black. J. Pavement Eng. 8, 251–260 (2003)
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Kawakami, A., Kawashima, Y., Nitta, H., Yabu, M. (2019). An Examination of Property Changes of Repeatedly Recycled Asphalt Bitumen Using Rejuvenator with High Aromatic Content. In: Poulikakos, L., Cannone Falchetto, A., Wistuba, M., Hofko, B., Porot, L., Di Benedetto, H. (eds) RILEM 252-CMB Symposium. RILEM 252-CMB 2018. RILEM Bookseries, vol 20. Springer, Cham. https://doi.org/10.1007/978-3-030-00476-7_30
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DOI: https://doi.org/10.1007/978-3-030-00476-7_30
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Online ISBN: 978-3-030-00476-7
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