Controlling the Formation of Electroactive Graphene‐Based Cementitious Composites: Towards Structural Health Monitoring of Civil Structures - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Chemistry - A European Journal Année : 2023

Controlling the Formation of Electroactive Graphene‐Based Cementitious Composites: Towards Structural Health Monitoring of Civil Structures

Résumé

The development of composites combining multiple components each one imparting a specific function to the ensemble is highly sought after for disruptive applications in chemistry and materials science, with a particular importance for the realization of smart structures. Here we report on the development of an unprecedented multifunctional cementitious composite incorporating reduced graphene oxide (rGO). By design, this material features significantly enhanced electrical properties while retaining the excellent cement's hydration and microstructure. The multiscale investigation on the chemical and physical properties of the dispersion made it possible to establish an efficient preparation protocol for rGO aqueous dispersion as well as rGO-based cementitious composites using a commercial poly(carboxylate ether)-based superplasticizer. The conduction mechanisms within the matrix of rGO containing mortars were unraveled by electrochemical impedance spectroscopy revealing conductive paths originating from bulk cement matrix and rGO nanosheets in composites with rGO loadings as low as 0.075wt.%. For this rGO loading, we observed the reduction of the resistivity of bulk cement mortar layers from 18.3 MΩ cm to 2.8 MΩ cm. Moreover, the addition of 0.2 wt.% of rGO resulted in the formation of rGO conductive paths with the resistivity of 51.1 kΩ cm. These findings represent a major step forward towards the practical application of graphene-based materials in structural health monitoring of concrete structures.
Fichier principal
Vignette du fichier
Chemistry A European J - 2023 - Safuta - Controlling the Formation of Electroactive Graphene‐Based Cementitious Composites .pdf (2.26 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04240347 , version 1 (13-10-2023)

Identifiants

Citer

Małgorzata Safuta, Artur Ciesielski, Paolo Samori. Controlling the Formation of Electroactive Graphene‐Based Cementitious Composites: Towards Structural Health Monitoring of Civil Structures. Chemistry - A European Journal, In press, ⟨10.1002/chem.202301816⟩. ⟨hal-04240347⟩
3 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More