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Sustainability
Volume 10
Issue 11
10.3390/su10114013
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Article

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

by
Alberto Belli
1,
Alessandra Mobili
1,
Tiziano Bellezze
1,
Francesca Tittarelli
1,2,* and
Paulo Cachim
3
1
Department of Materials, Environmental Sciences and Urban Planning, Università Politecnica delle Marche, via Brecce Bianche 12, INSTM Research Unit, Ancona 60131, Italy
2
Institute of Atmospheric Sciences and Climate, National Research Council (ISAC-CNR), Via Gobetti 101, Bologna 40129, Italy
3
Department of Civil Engineering (DECIVIL), Universidade de Aveiro, RISCO Research Unit, Aveiro 3810-193, Portugal
*
Author to whom correspondence should be addressed.
Sustainability 2018, 10(11), 4013; https://doi.org/10.3390/su10114013
Received: 28 September 2018 / Revised: 29 October 2018 / Accepted: 31 October 2018 / Published: 2 November 2018
(This article belongs to the Special Issue Sustainable Buildings and Indoor Air Quality)
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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. View Full-Text
Keywords: cement; mortar; carbon fiber; filler; graphene; self-sensing; piezoresistivity; recycling; mechanical properties cement; mortar; carbon fiber; filler; graphene; self-sensing; piezoresistivity; recycling; mechanical properties
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MDPI and ACS Style

Belli, A.; Mobili, A.; Bellezze, T.; Tittarelli, F.; Cachim, P. Evaluating the Self-Sensing Ability of Cement Mortars Manufactured with Graphene Nanoplatelets, Virgin or Recycled Carbon Fibers through Piezoresistivity Tests. Sustainability 2018, 10, 4013. https://doi.org/10.3390/su10114013

AMA Style

Belli A, Mobili A, Bellezze T, Tittarelli F, Cachim P. Evaluating the Self-Sensing Ability of Cement Mortars Manufactured with Graphene Nanoplatelets, Virgin or Recycled Carbon Fibers through Piezoresistivity Tests. Sustainability. 2018; 10(11):4013. https://doi.org/10.3390/su10114013

Chicago/Turabian Style

Belli, Alberto, Alessandra Mobili, Tiziano Bellezze, Francesca Tittarelli, and Paulo Cachim. 2018. "Evaluating the Self-Sensing Ability of Cement Mortars Manufactured with Graphene Nanoplatelets, Virgin or Recycled Carbon Fibers through Piezoresistivity Tests" Sustainability 10, no. 11: 4013. https://doi.org/10.3390/su10114013

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