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Influence of the Microwave Heating Time on the Self-Healing Properties of Asphalt Mixtures

Jose Norambuena-Contreras Orcid Logo, Irene Gonzalez-Torre

Applied Sciences, Volume: 7, Issue: 10, Start page: 1076

Swansea University Author: Jose Norambuena-Contreras Orcid Logo

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DOI (Published version): 10.3390/app7101076

Abstract

This paper aims to evaluate the influence of the microwave heating time on the self-healing properties of fibre-reinforced asphalt mixtures. To this purpose, self-healing properties of dense asphalt mixtures with four different percentages of steel wool fibres were evaluated as the three-point bendi...

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Published in: Applied Sciences
ISSN: 2076-3417
Published: MDPI AG 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa66809
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spelling 2024-07-26T13:21:01.3032566 v2 66809 2024-06-20 Influence of the Microwave Heating Time on the Self-Healing Properties of Asphalt Mixtures 73c6854ebb10465fbf7faab297135641 0000-0001-8327-2236 Jose Norambuena-Contreras Jose Norambuena-Contreras true false 2024-06-20 ACEM This paper aims to evaluate the influence of the microwave heating time on the self-healing properties of fibre-reinforced asphalt mixtures. To this purpose, self-healing properties of dense asphalt mixtures with four different percentages of steel wool fibres were evaluated as the three-point bending strength before and after healing via microwave heating at four different heating times. Furthermore, the thermal behaviour of asphalt mixtures during microwave heating was also evaluated. With the aim of quantifying the efficiency of the repair process, ten damage-healing cycles were done in the test samples. In addition, self-healing results were compared with the fibre spatial distribution inside asphalt samples evaluated by CT-scans. Crack-size change on asphalt samples during healing cycles was also evaluated through optical microscopy. It was found that the heating time is the most influential variable on the healing level reached by the asphalt mixtures tested by microwave radiation. CT-Scans results proved that fibre spatial distribution into the asphalt mixtures play an important role in the asphalt healing level. Finally, it was concluded that 40 s was the optimum heating time to reach the highest healing levels with the lowest damage on the asphalt samples, and that heating times over 30 s can seal the cracks, thus achieving the self-healing of asphalt mixtures via microwave heating. Journal Article Applied Sciences 7 10 1076 MDPI AG 2076-3417 self-healing; asphalt mixture; metallic fibres; microwave heating; heating time 18 10 2017 2017-10-18 10.3390/app7101076 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University The authors want to thank the financial support given by the National Commission for Scientific & Technological Research (CONICYT) from the Government of Chile, through the Research Project FONDECYT Initiation 2014 No. 11140103. In addition, the authors would also like to acknowledge the experimental help provided by Eng. José L. Concha from LabMAT and the bachelor student Manuel Riffo, from the Department of Civil and Environmental Engineering, both from the University of Bío-Bío. Finally, the authors also want to thank Ricardo Serpell from PUC-Chile for his help with the CT-Scan tests. 2024-07-26T13:21:01.3032566 2024-06-20T13:10:32.0834521 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering Jose Norambuena-Contreras 0000-0001-8327-2236 1 Irene Gonzalez-Torre 2 66809__30997__b83c783a20ba4a14823f2d5123c09304.pdf 66809.VoR.pdf 2024-07-26T13:17:06.5712440 Output 7491510 application/pdf Version of Record true © 2017 by the authors. This is an open accessarticle distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license. true eng http://creativecommons.org/licenses/by/4.0/
title Influence of the Microwave Heating Time on the Self-Healing Properties of Asphalt Mixtures
spellingShingle Influence of the Microwave Heating Time on the Self-Healing Properties of Asphalt Mixtures
Jose Norambuena-Contreras
title_short Influence of the Microwave Heating Time on the Self-Healing Properties of Asphalt Mixtures
title_full Influence of the Microwave Heating Time on the Self-Healing Properties of Asphalt Mixtures
title_fullStr Influence of the Microwave Heating Time on the Self-Healing Properties of Asphalt Mixtures
title_full_unstemmed Influence of the Microwave Heating Time on the Self-Healing Properties of Asphalt Mixtures
title_sort Influence of the Microwave Heating Time on the Self-Healing Properties of Asphalt Mixtures
author_id_str_mv 73c6854ebb10465fbf7faab297135641
author_id_fullname_str_mv 73c6854ebb10465fbf7faab297135641_***_Jose Norambuena-Contreras
author Jose Norambuena-Contreras
author2 Jose Norambuena-Contreras
Irene Gonzalez-Torre
format Journal article
container_title Applied Sciences
container_volume 7
container_issue 10
container_start_page 1076
publishDate 2017
institution Swansea University
issn 2076-3417
doi_str_mv 10.3390/app7101076
publisher MDPI AG
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering
document_store_str 1
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description This paper aims to evaluate the influence of the microwave heating time on the self-healing properties of fibre-reinforced asphalt mixtures. To this purpose, self-healing properties of dense asphalt mixtures with four different percentages of steel wool fibres were evaluated as the three-point bending strength before and after healing via microwave heating at four different heating times. Furthermore, the thermal behaviour of asphalt mixtures during microwave heating was also evaluated. With the aim of quantifying the efficiency of the repair process, ten damage-healing cycles were done in the test samples. In addition, self-healing results were compared with the fibre spatial distribution inside asphalt samples evaluated by CT-scans. Crack-size change on asphalt samples during healing cycles was also evaluated through optical microscopy. It was found that the heating time is the most influential variable on the healing level reached by the asphalt mixtures tested by microwave radiation. CT-Scans results proved that fibre spatial distribution into the asphalt mixtures play an important role in the asphalt healing level. Finally, it was concluded that 40 s was the optimum heating time to reach the highest healing levels with the lowest damage on the asphalt samples, and that heating times over 30 s can seal the cracks, thus achieving the self-healing of asphalt mixtures via microwave heating.
published_date 2017-10-18T20:31:58Z
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score 11.04748

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