Effect of Gasification Char and Recycled Carbon Fibres on the Electrical Impedance of Concrete Exposed to Accelerated Degradation

Alessandra Mobili, Gloria Cosoli, Nicola Giulietti, Paolo Chiariotti, Giuseppe Pandarese, Tiziano Bellezze, Gian Marco Revel and Francesca Tittarelli
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Alessandra Mobili: Department of Materials, Environmental Sciences and Urban Planning (SIMAU), Università Politecnica delle Marche—INSTM Research Unit, 60131 Ancona, Italy
Gloria Cosoli: Department of Industrial Engineering and Mathematical Science (DIISM), Università Politecnica delle Marche, 60131 Ancona, Italy
Nicola Giulietti: Department of Mechanical Engineering, Politecnico di Milano, 20156 Milano, Italy
Paolo Chiariotti: Department of Mechanical Engineering, Politecnico di Milano, 20156 Milano, Italy
Giuseppe Pandarese: Department of Industrial Engineering and Mathematical Science (DIISM), Università Politecnica delle Marche, 60131 Ancona, Italy
Tiziano Bellezze: Department of Materials, Environmental Sciences and Urban Planning (SIMAU), Università Politecnica delle Marche—INSTM Research Unit, 60131 Ancona, Italy
Gian Marco Revel: Department of Industrial Engineering and Mathematical Science (DIISM), Università Politecnica delle Marche, 60131 Ancona, Italy
Francesca Tittarelli: Department of Materials, Environmental Sciences and Urban Planning (SIMAU), Università Politecnica delle Marche—INSTM Research Unit, 60131 Ancona, Italy

Sustainability, 2022, vol. 14, issue 3, 1-21

Abstract: This paper aims to evaluate the effect of carbon-based conductive recycled additions, i.e., recycled carbon fibres (RCF) and gasification char (GCH), on the mechanical, electrical, and durability properties of concretes. The obtained results show that the compressive strength of concrete is not affected by conductive additions, whereas electrical impedance, measured according to Wenner’s method, is significantly reduced (6%, 30% and 74% with RCF, GCH, and their combination, respectively) to the advantage of self-sensing properties. As durability is concerned, conductive additions slightly increase capillary water absorption, whereas they decrease chloride ingress through diffusion and do not significantly modify carbonation resistance.

Keywords: concrete; durability; carbon-based additions; char; carbon fibres; capillary water absorption; chloride penetration; carbonation; electrical impedance measurement (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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