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Evaluating the Self-Sensing Ability of Cement Mortars Manufactured with Graphene Nanoplatelets, Virgin or Recycled Carbon Fibers through Piezoresistivity Tests

Author

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  • Alberto Belli

    (Department of Materials, Environmental Sciences and Urban Planning, Università Politecnica delle Marche, via Brecce Bianche 12, INSTM Research Unit, Ancona 60131, Italy)

  • Alessandra Mobili

    (Department of Materials, Environmental Sciences and Urban Planning, Università Politecnica delle Marche, via Brecce Bianche 12, INSTM Research Unit, Ancona 60131, Italy)

  • Tiziano Bellezze

    (Department of Materials, Environmental Sciences and Urban Planning, Università Politecnica delle Marche, via Brecce Bianche 12, INSTM Research Unit, Ancona 60131, Italy)

  • Francesca Tittarelli

    (Department of Materials, Environmental Sciences and Urban Planning, Università Politecnica delle Marche, via Brecce Bianche 12, INSTM Research Unit, Ancona 60131, Italy
    Institute of Atmospheric Sciences and Climate, National Research Council (ISAC-CNR), Via Gobetti 101, Bologna 40129, Italy)

  • Paulo Cachim

    (Department of Civil Engineering (DECIVIL), Universidade de Aveiro, RISCO Research Unit, Aveiro 3810-193, Portugal)

Abstract

This paper presents the resistivity and piezoresistivity behavior of cement-based mortars manufactured with graphene nanoplatelet filler (GNP), virgin carbon fibers (VCF) and recycled carbon fibers (RCF). GNP was added at 4% of the cement weight, whereas two percentages of carbon fibers were chosen, namely 0.05% and 0.2% of the total volume. The combined effect of both filler and fibers was also investigated. Mortars were studied in terms of their mechanical properties (under flexure and compression) and electrical resistivity. Mortars with the lowest electrical resistivity values were also subjected to cyclic uniaxial compression to evaluate the variations in electrical resistivity as a function of strain. The results obtained show that mortars have piezoresistive behavior only if they are subjected to a prior drying process. In addition, dry specimens exhibit a high piezoresistivity only when loaded with 0.2 vol.% of VCF and 0.4 wt.% of GNP plus 0.2 vol.% RCF, with a quite reversible relation between their fractional change in resistivity (FCR) and compressive strain.

Suggested Citation

  • Alberto Belli & Alessandra Mobili & Tiziano Bellezze & Francesca Tittarelli & Paulo Cachim, 2018. "Evaluating the Self-Sensing Ability of Cement Mortars Manufactured with Graphene Nanoplatelets, Virgin or Recycled Carbon Fibers through Piezoresistivity Tests," Sustainability, MDPI, vol. 10(11), pages 1-12, November.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:11:p:4013-:d:180064
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    References listed on IDEAS

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    1. D'Alessandro, Antonella & Pisello, Anna Laura & Fabiani, Claudia & Ubertini, Filippo & Cabeza, Luisa F. & Cotana, Franco, 2018. "Multifunctional smart concretes with novel phase change materials: Mechanical and thermo-energy investigation," Applied Energy, Elsevier, vol. 212(C), pages 1448-1461.
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    Cited by:

    1. Antonella D’Alessandro & Denny Coffetti & Elena Crotti & Luigi Coppola & Andrea Meoni & Filippo Ubertini, 2020. "Self-Sensing Properties of Green Alkali-Activated Binders with Carbon-Based Nanoinclusions," Sustainability, MDPI, vol. 12(23), pages 1-13, November.
    2. Twana Hussein & Rawaz Kurda & Mohammad Mosaberpanah & Rayed Alyousef, 2022. "A Review of the Combined Effect of Fibers and Nano Materials on the Technical Performance of Mortar and Concrete," Sustainability, MDPI, vol. 14(6), pages 1-33, March.

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