Toward a better understanding of multifunctional cement-based materials: The impact of graphite nanoplatelets (GNPs)

Francesca R. Lamastra; Mehdi Chougan; Emanuele Marotta; Samuele Ciattini; Seyed Hamidreza Ghaffar; Stefano Caporali; Francesco Vivio; Giampiero Montesperelli; Ugo Ianniruberto; Mazen J. Al-Kheetan; Alessandra Bianco

doi:10.1016/j.ceramint.2021.04.012

Toward a better understanding of multifunctional cement-based materials: The impact of graphite nanoplatelets (GNPs)

Francesca R. Lamastra^*, Mehdi Chougan, Emanuele Marotta, Samuele Ciattini, Seyed Hamidreza Ghaffar, Stefano Caporali, Francesco Vivio, Giampiero Montesperelli, Ugo Ianniruberto, Mazen J. Al-Kheetan, Alessandra Bianco

^*Corresponding author for this work

Civil Engineering

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

The impact of graphite nanoplatelets (GNPs) on the physical and mechanical properties of cementitious nanocomposites was investigated. A market-available premixed mortar was modified with 0.01% by weight of cement of commercial GNPs characterized by two distinctively different aspect ratios.

The rheological behavior of the GNP-modified fresh admixtures was thoroughly evaluated. Hardened cementitious nanocomposites were investigated in terms of density, microstructure (Scanning Electron Microscopy, SEM and micro–Computed Tomography, μ-CT), mechanical properties (three-point bending and compression tests), and physical properties (electrochemical impedance spectroscopy, EIS and thermal conductivity measurements). At 28 days, all GNP-modified mortars showed about 12% increased density. Mortars reinforced with high aspect ratio GNPs exhibited the highest compressive and flexural strength: about 14% and 4% improvements compared to control sample, respectively. Conversely, low aspect ratio GNPs led to cementitious nanocomposites characterized by 36% decreased electrical resistivity combined with 60% increased thermal conductivity with respect to the control sample.

Original language	English
Pages (from-to)	20019-20031
Number of pages	13
Journal	Ceramics International
Volume	47
Issue number	14
Early online date	3 Apr 2021
DOIs	https://doi.org/10.1016/j.ceramint.2021.04.012
Publication status	Published - 15 Jul 2021

Bibliographical note

Funding Information:
The authors wish to thank prof. Alessandra D'Epifanio of the Department of Chemical Science and Technologies - University of Rome Tor Vergata for the availability of EIS measurement apparatus.

Publisher Copyright:
© 2021 Elsevier Ltd and Techna Group S.r.l.

Keywords

Cementitious nanocomposites
Graphite nanoplatelets (GNPs)
Mechanical properties
Microstructure
Resistivity
Thermal conductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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Lamastra, F. R., Chougan, M., Marotta, E., Ciattini, S., Ghaffar, S. H., Caporali, S., Vivio, F., Montesperelli, G., Ianniruberto, U., Al-Kheetan, M. J., & Bianco, A. (2021). Toward a better understanding of multifunctional cement-based materials: The impact of graphite nanoplatelets (GNPs). Ceramics International, 47(14), 20019-20031. https://doi.org/10.1016/j.ceramint.2021.04.012

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title = "Toward a better understanding of multifunctional cement-based materials: The impact of graphite nanoplatelets (GNPs)",

abstract = "The impact of graphite nanoplatelets (GNPs) on the physical and mechanical properties of cementitious nanocomposites was investigated. A market-available premixed mortar was modified with 0.01% by weight of cement of commercial GNPs characterized by two distinctively different aspect ratios.The rheological behavior of the GNP-modified fresh admixtures was thoroughly evaluated. Hardened cementitious nanocomposites were investigated in terms of density, microstructure (Scanning Electron Microscopy, SEM and micro–Computed Tomography, μ-CT), mechanical properties (three-point bending and compression tests), and physical properties (electrochemical impedance spectroscopy, EIS and thermal conductivity measurements). At 28 days, all GNP-modified mortars showed about 12% increased density. Mortars reinforced with high aspect ratio GNPs exhibited the highest compressive and flexural strength: about 14% and 4% improvements compared to control sample, respectively. Conversely, low aspect ratio GNPs led to cementitious nanocomposites characterized by 36% decreased electrical resistivity combined with 60% increased thermal conductivity with respect to the control sample.",

keywords = "Cementitious nanocomposites, Graphite nanoplatelets (GNPs), Mechanical properties, Microstructure, Resistivity, Thermal conductivity",

author = "Lamastra, {Francesca R.} and Mehdi Chougan and Emanuele Marotta and Samuele Ciattini and Ghaffar, {Seyed Hamidreza} and Stefano Caporali and Francesco Vivio and Giampiero Montesperelli and Ugo Ianniruberto and Al-Kheetan, {Mazen J.} and Alessandra Bianco",

note = "Funding Information: The authors wish to thank prof. Alessandra D'Epifanio of the Department of Chemical Science and Technologies - University of Rome Tor Vergata for the availability of EIS measurement apparatus. Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd and Techna Group S.r.l.",

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doi = "10.1016/j.ceramint.2021.04.012",

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Lamastra, FR, Chougan, M, Marotta, E, Ciattini, S, Ghaffar, SH, Caporali, S, Vivio, F, Montesperelli, G, Ianniruberto, U, Al-Kheetan, MJ & Bianco, A 2021, 'Toward a better understanding of multifunctional cement-based materials: The impact of graphite nanoplatelets (GNPs)', Ceramics International, vol. 47, no. 14, pp. 20019-20031. https://doi.org/10.1016/j.ceramint.2021.04.012

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AU - Lamastra, Francesca R.

AU - Chougan, Mehdi

AU - Marotta, Emanuele

AU - Ciattini, Samuele

AU - Ghaffar, Seyed Hamidreza

AU - Caporali, Stefano

AU - Vivio, Francesco

AU - Montesperelli, Giampiero

AU - Ianniruberto, Ugo

AU - Al-Kheetan, Mazen J.

AU - Bianco, Alessandra

N1 - Funding Information: The authors wish to thank prof. Alessandra D'Epifanio of the Department of Chemical Science and Technologies - University of Rome Tor Vergata for the availability of EIS measurement apparatus. Publisher Copyright: © 2021 Elsevier Ltd and Techna Group S.r.l.

PY - 2021/7/15

Y1 - 2021/7/15

N2 - The impact of graphite nanoplatelets (GNPs) on the physical and mechanical properties of cementitious nanocomposites was investigated. A market-available premixed mortar was modified with 0.01% by weight of cement of commercial GNPs characterized by two distinctively different aspect ratios.The rheological behavior of the GNP-modified fresh admixtures was thoroughly evaluated. Hardened cementitious nanocomposites were investigated in terms of density, microstructure (Scanning Electron Microscopy, SEM and micro–Computed Tomography, μ-CT), mechanical properties (three-point bending and compression tests), and physical properties (electrochemical impedance spectroscopy, EIS and thermal conductivity measurements). At 28 days, all GNP-modified mortars showed about 12% increased density. Mortars reinforced with high aspect ratio GNPs exhibited the highest compressive and flexural strength: about 14% and 4% improvements compared to control sample, respectively. Conversely, low aspect ratio GNPs led to cementitious nanocomposites characterized by 36% decreased electrical resistivity combined with 60% increased thermal conductivity with respect to the control sample.

AB - The impact of graphite nanoplatelets (GNPs) on the physical and mechanical properties of cementitious nanocomposites was investigated. A market-available premixed mortar was modified with 0.01% by weight of cement of commercial GNPs characterized by two distinctively different aspect ratios.The rheological behavior of the GNP-modified fresh admixtures was thoroughly evaluated. Hardened cementitious nanocomposites were investigated in terms of density, microstructure (Scanning Electron Microscopy, SEM and micro–Computed Tomography, μ-CT), mechanical properties (three-point bending and compression tests), and physical properties (electrochemical impedance spectroscopy, EIS and thermal conductivity measurements). At 28 days, all GNP-modified mortars showed about 12% increased density. Mortars reinforced with high aspect ratio GNPs exhibited the highest compressive and flexural strength: about 14% and 4% improvements compared to control sample, respectively. Conversely, low aspect ratio GNPs led to cementitious nanocomposites characterized by 36% decreased electrical resistivity combined with 60% increased thermal conductivity with respect to the control sample.

KW - Cementitious nanocomposites

KW - Graphite nanoplatelets (GNPs)

KW - Mechanical properties

KW - Microstructure

KW - Resistivity

KW - Thermal conductivity

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U2 - 10.1016/j.ceramint.2021.04.012

DO - 10.1016/j.ceramint.2021.04.012

M3 - Article

AN - SCOPUS:85104152541

SN - 0272-8842

VL - 47

SP - 20019

EP - 20031

JO - Ceramics International

JF - Ceramics International

IS - 14

ER -

Toward a better understanding of multifunctional cement-based materials: The impact of graphite nanoplatelets (GNPs)

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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Cite this