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Microwave Heating and Self-Healing Performance of Asphalt Mixtures Containing Metallic Fibres from Recycled Tyres

Jose Norambuena-Contreras Orcid Logo, Jose L. Concha Orcid Logo, María J. Varela, Laura Trigos Orcid Logo, Lily Poulikakos, Alvaro González, Martín Arraigada Orcid Logo

Materials, Volume: 17, Issue: 23, Start page: 5950

Swansea University Author: Jose Norambuena-Contreras Orcid Logo

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DOI (Published version): 10.3390/ma17235950

Abstract

This study investigates how recycled metal fibres from End-of-Life Tyres (ELTs) affect both microwave heating efficiency and crack healing properties in dense asphalt mixtures. The aim is to improve tyre recyclability by using their fibres in asphalt and exploring their self-healing potential with m...

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Published in: Materials
ISSN: 1996-1944
Published: MDPI AG 2024
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URI: https://cronfa.swan.ac.uk/Record/cronfa68475
first_indexed 2024-12-06T13:48:58Z
last_indexed 2024-12-06T19:47:02Z
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spelling 2024-12-06T12:27:51.6178203 v2 68475 2024-12-06 Microwave Heating and Self-Healing Performance of Asphalt Mixtures Containing Metallic Fibres from Recycled Tyres 73c6854ebb10465fbf7faab297135641 0000-0001-8327-2236 Jose Norambuena-Contreras Jose Norambuena-Contreras true false 2024-12-06 ACEM This study investigates how recycled metal fibres from End-of-Life Tyres (ELTs) affect both microwave heating efficiency and crack healing properties in dense asphalt mixtures. The aim is to improve tyre recyclability by using their fibres in asphalt and exploring their self-healing potential with microwave heating. To achieve this, four dense asphalt mixture designs were studied in the laboratory. Each mixture used the same aggregate gradation and bitumen content, but with three different percentages of metallic fibres by binder volume (i.e., 1.5%, 2.5%, and 3.5%), along with an asphalt mixture without fibres serving as a reference material. The microwave heating properties of the asphalt mixtures and their individual components (i.e., aggregates and bitumen) were measured at six different heating times, ranging from 10 to 60 s. Based on the microwave heating results, the cracking and subsequent self-healing properties of the mixtures were evaluated by exposing them to microwave radiation at three heating times: 30, 40, and 50 s. The main results indicated that adding metallic fibres to facilitate microwave heating of the asphalt mixture is unnecessary because healing can be triggered predominately through the aggregates used. Unlike previous studies, it was observed that the healing level of asphalt mixtures, both with and without metallic fibres, increases with the accumulation of crack-healing cycles. Finally, it was determined that the advised microwave heating time for laboratory-sized mixtures, with or without fibres, is 40 s. Journal Article Materials 17 23 5950 MDPI AG 1996-1944 5 12 2024 2024-12-05 10.3390/ma17235950 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University Leading House for the Latin American Region, Universität St. Gallen, Switzerland through the Seed Money Grant (SMG) project 1801. 2024-12-06T12:27:51.6178203 2024-12-06T10:10:31.0259703 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering Jose Norambuena-Contreras 0000-0001-8327-2236 1 Jose L. Concha 0000-0003-3746-651x 2 María J. Varela 3 Laura Trigos 0000-0003-3923-8190 4 Lily Poulikakos 5 Alvaro González 6 Martín Arraigada 0000-0001-8435-7565 7
title Microwave Heating and Self-Healing Performance of Asphalt Mixtures Containing Metallic Fibres from Recycled Tyres
spellingShingle Microwave Heating and Self-Healing Performance of Asphalt Mixtures Containing Metallic Fibres from Recycled Tyres
Jose Norambuena-Contreras
title_short Microwave Heating and Self-Healing Performance of Asphalt Mixtures Containing Metallic Fibres from Recycled Tyres
title_full Microwave Heating and Self-Healing Performance of Asphalt Mixtures Containing Metallic Fibres from Recycled Tyres
title_fullStr Microwave Heating and Self-Healing Performance of Asphalt Mixtures Containing Metallic Fibres from Recycled Tyres
title_full_unstemmed Microwave Heating and Self-Healing Performance of Asphalt Mixtures Containing Metallic Fibres from Recycled Tyres
title_sort Microwave Heating and Self-Healing Performance of Asphalt Mixtures Containing Metallic Fibres from Recycled Tyres
author_id_str_mv 73c6854ebb10465fbf7faab297135641
author_id_fullname_str_mv 73c6854ebb10465fbf7faab297135641_***_Jose Norambuena-Contreras
author Jose Norambuena-Contreras
author2 Jose Norambuena-Contreras
Jose L. Concha
María J. Varela
Laura Trigos
Lily Poulikakos
Alvaro González
Martín Arraigada
format Journal article
container_title Materials
container_volume 17
container_issue 23
container_start_page 5950
publishDate 2024
institution Swansea University
issn 1996-1944
doi_str_mv 10.3390/ma17235950
publisher MDPI AG
college_str Faculty of Science and Engineering
hierarchytype
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 - Civil Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering
document_store_str 0
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description This study investigates how recycled metal fibres from End-of-Life Tyres (ELTs) affect both microwave heating efficiency and crack healing properties in dense asphalt mixtures. The aim is to improve tyre recyclability by using their fibres in asphalt and exploring their self-healing potential with microwave heating. To achieve this, four dense asphalt mixture designs were studied in the laboratory. Each mixture used the same aggregate gradation and bitumen content, but with three different percentages of metallic fibres by binder volume (i.e., 1.5%, 2.5%, and 3.5%), along with an asphalt mixture without fibres serving as a reference material. The microwave heating properties of the asphalt mixtures and their individual components (i.e., aggregates and bitumen) were measured at six different heating times, ranging from 10 to 60 s. Based on the microwave heating results, the cracking and subsequent self-healing properties of the mixtures were evaluated by exposing them to microwave radiation at three heating times: 30, 40, and 50 s. The main results indicated that adding metallic fibres to facilitate microwave heating of the asphalt mixture is unnecessary because healing can be triggered predominately through the aggregates used. Unlike previous studies, it was observed that the healing level of asphalt mixtures, both with and without metallic fibres, increases with the accumulation of crack-healing cycles. Finally, it was determined that the advised microwave heating time for laboratory-sized mixtures, with or without fibres, is 40 s.
published_date 2024-12-05T20:49:40Z
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score 11.048302

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