Self-sensing concrete made from recycled carbon fibres
The electrical and piezo-resistive responses of recycled carbon fibre (rCF)-reinforced concrete is analysed in this article. Two different PAN-based rCFs (monofilament rCF and fibrillated rCF sheets) incorporated into dry concrete mix were investigated. Piezo-resistivity was evaluated by simultaneou...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/169347 |
| Acceso en línea: | https://hdl.handle.net/2117/169347 https://dx.doi.org/10.1088/1361-665X/ab3d59 |
| Access Level: | acceso abierto |
| Palabra clave: | Concrete--Recycling Self-sensing concrete Strain sensing Recycled carbon fibre Smart material Formigó -- Reciclatge Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures::Materials i estructures de formigó |
| Sumario: | The electrical and piezo-resistive responses of recycled carbon fibre (rCF)-reinforced concrete is analysed in this article. Two different PAN-based rCFs (monofilament rCF and fibrillated rCF sheets) incorporated into dry concrete mix were investigated. Piezo-resistivity was evaluated by simultaneously monitoring the variation in the applied DC voltage during both flexural and compressive tests. Although both plain and rCF-reinforced concrete samples showed piezo-resistive responses, the latter show increased signal-to-noise-ratio and thus behave like self-sensing materials. The electrical behaviour suggests a mixed control owing to both ionic and electronic conductivity, with the dominant one depending on the rCF content and rCF dispersion. This work enhances the possibility of generalising the use of smart cementitious materials in the civil engineering industry. |
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