https://orcid.org/0000-0002-7488-1387
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ABSTRACT
Roads, due to use and time, become aged and as a result, they require maintenance. This paper presents a promising technology to compensate ageing. The method uses porous aggregates as capsules containing rejuvenator. The rejuvenator will be released during the asphalt pavement's service life, reversing the impact of ageing on asphalt performance, properties and, thus, extending pavement's durability. This paper describes the properties of two porous aggregates, the encapsulation method and the properties of the capsules. The capsules were incorporated into an asphalt mix and their fundamental properties analysed. Finally, the recovery potential of the aged binder was evaluated using ageing tests. The results demonstrate the effectiveness of the technology, a change in binder properties was observed over time, but to a lesser extent for the bitumen when capsules were included than for the reference. The solution also highlights the benefits of using encapsulated rejuvenator over the use of rejuvenator directly added to the mix.
Acknowledgements
The authors acknowledge the financial support from the National project REPARA v2.0, funded by the Centre for Industrial Technological Development (CDTI) of the Spanish Government within the programme supporting the Strategic National Consortiums for Technical Investigation (CIEN). The authors wish to thank Mr. Carlos Martín-Portugués Montoliu and Mr. Francisco José Lucas Ochoa from ACCIONA and REPSOL, respectively, for their contribution to this study. Similarly, we are grateful to Professor Juan Gallego Medina from the Polytechnic University of Madrid, for his collaboration in the development of the research.
Disclosure statement
No potential conflict of interest was reported by the author(s).