Journal article 203 views 12 downloads
Effect of capsule addition and healing temperature on the self-healing potential of asphalt mixtures
,
A. Garcia
Materials and Structures, Volume: 51, Issue: 2
Swansea University Author:
Jose Norambuena-Contreras
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Copyright: The Author(s) 2018. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License.
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DOI (Published version): 10.1617/s11527-018-1172-5
Abstract
This paper presents the self-healing results of asphalt mixtures by the action of capsules containing sunflower oil as encapsulated rejuvenator. Three different capsule contents, 0.10, 0.25 and 0.50% by total weight of the mixture, were added to the samples. The mechanical and thermal properties of...
| Published in: | Materials and Structures |
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| ISSN: | 1359-5997 1871-6873 |
| Published: |
Springer Science and Business Media LLC
2018
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa66800 |
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| Abstract: |
This paper presents the self-healing results of asphalt mixtures by the action of capsules containing sunflower oil as encapsulated rejuvenator. Three different capsule contents, 0.10, 0.25 and 0.50% by total weight of the mixture, were added to the samples. The mechanical and thermal properties of capsules have been evaluated. In addition, the effect of the capsule addition and the healing temperature on the self-healing properties of asphalt mixtures have been evaluated through three-point bending tests on the cracked asphalt beams with, and without, capsules. The test was implemented by comparing the strength recovery of the broken beams after healing to their original flexural strength. It was proven that the capsules can resist the mixing and compaction processes and break inside the asphalt mixture as a result of applying external mechanical loads, releasing the encapsulated oil. The capsules content in asphalt mixture has a significant influence on the healing level, where a higher capsule content led to obtaining higher healing levels. Likewise, asphalt with, and without, capsules presents an increase of the healing level when the temperature increases. Finally, it was proved that healing temperature has higher influence on the healing levels of the asphalt below 40 °C. |
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| Keywords: |
Asphalt mixture; Capsule influence; Encapsulated rejuvenator; Healing temperature; Healing level |
| College: |
Faculty of Science and Engineering |
| Funders: |
The first author would like to acknowledge the financial support of the Higher Committee for Education Development in Iraq for his Ph.D. scholarship. The second author wishes to thank the Government of Chile, since this work was partially funded by the CONICYT/BECAS CHILE 74170030. Finally, the authors would like to thank Highways England from the Government of the UK for the funding given, through the Research Project ref. 558065, entitled: Self-healing asphalt using embedded capsules. |
| Issue: |
2 |