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

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dc.catalogadordfo
dc.contributor.authorNorambuena-Contreras, Jose
dc.contributor.authorConcha, Jose L.
dc.contributor.authorVarela, Maria J.
dc.contributor.authorTrigos, Laura
dc.contributor.authorPoulikakos, Lily
dc.contributor.authorGonzález Fehrmann, Álvaro Ignacio
dc.contributor.authorArraigada, Martin
dc.date.accessioned2025-03-21T16:17:57Z
dc.date.available2025-03-21T16:17:57Z
dc.date.issued2024
dc.description.abstractThis 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.
dc.description.funderLeading House for the Latin American Region, Universitat St. Gallen, Switzerland
dc.fechaingreso.objetodigital2025-03-21
dc.format.extent21 páginas
dc.fuente.origenWOS
dc.identifier.doi10.3390/ma17235950
dc.identifier.eissn1996-1944
dc.identifier.urihttps://doi.org/10.3390/ma17235950
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/102925
dc.identifier.wosidWOS:001376409900001
dc.information.autorucEscuela de Ingeniería; Gonzalez Fehrmann Alvaro Ignacio; S/I; 214404
dc.issue.numero23
dc.language.isoen
dc.nota.accesoContenido completo
dc.revistaMaterials
dc.rightsacceso abierto
dc.rights.licenseAtribución/Reconocimiento 4.0 Internacional
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subjectSelf-healing
dc.subjectAsphalt mixture
dc.subjectMetallic fibres
dc.subjectMicrowave heating
dc.subject.ddc620
dc.subject.deweyIngenieríaes_ES
dc.subject.ods09 Industry, innovation and infrastructure
dc.subject.odspa09 Industria, innovación e infraestructura
dc.titleMicrowave Heating and Self-Healing Performance of Asphalt Mixtures Containing Metallic Fibres from Recycled Tyres
dc.typeartículo
dc.volumen17
sipa.codpersvinculados214404
sipa.trazabilidadWOS;2025-01-11
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