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Insights into the Mechanism of Graphene Acting on Water and Chloride Ion Permeability of Cement-Based Materials

Due to its excellent mechanical properties and high aspect ratio, graphene can significantly improve the water and chloride ion permeability resistance of cementitious materials. However, few studies have investigated the effect of graphene size on the water and chloride ion permeability resistance...

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Autores principales: Dong, Jianmiao, Zhuang, Jiaqiao, Li, Wanjin, Zou, Mingxuan, He, Qi, Luo, Shuqiong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10222090/
https://www.ncbi.nlm.nih.gov/pubmed/37241508
http://dx.doi.org/10.3390/ma16103881
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author Dong, Jianmiao
Zhuang, Jiaqiao
Li, Wanjin
Zou, Mingxuan
He, Qi
Luo, Shuqiong
author_facet Dong, Jianmiao
Zhuang, Jiaqiao
Li, Wanjin
Zou, Mingxuan
He, Qi
Luo, Shuqiong
author_sort Dong, Jianmiao
collection PubMed
description Due to its excellent mechanical properties and high aspect ratio, graphene can significantly improve the water and chloride ion permeability resistance of cementitious materials. However, few studies have investigated the effect of graphene size on the water and chloride ion permeability resistance of cementitious materials. The main issues are as follows: How do different sizes of graphene affect the water and chloride ion permeability resistance of cement-based materials, and by what means do they affect these properties? To address these issues, in this paper, two different sizes of graphene were used to prepare graphene dispersion, which was then mixed with cement to make graphene-reinforced cement-based materials. The permeability and microstructure of samples were investigated. Results show that the addition of graphene effectively improved both the water and chloride ion permeability resistance of cement-based materials significantly. The SEM (scanning electron microscope) images and XRD (X-ray diffraction) analysis show that the introduction of either type of graphene could effectively regulate the crystal size and morphology of hydration products and reduce the crystal size and the number of needle-like and rod-like hydration products. The main types of hydrated products are calcium hydroxide, ettringite, etc. The template effect of large-size graphene was more obvious, and a large number of regular flower-like cluster hydration products were formed, which made the structure of cement paste more compact and thus significantly improved the resistance to the penetration of water and chloride ions into the matrix of the concrete.
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spelling pubmed-102220902023-05-28 Insights into the Mechanism of Graphene Acting on Water and Chloride Ion Permeability of Cement-Based Materials Dong, Jianmiao Zhuang, Jiaqiao Li, Wanjin Zou, Mingxuan He, Qi Luo, Shuqiong Materials (Basel) Article Due to its excellent mechanical properties and high aspect ratio, graphene can significantly improve the water and chloride ion permeability resistance of cementitious materials. However, few studies have investigated the effect of graphene size on the water and chloride ion permeability resistance of cementitious materials. The main issues are as follows: How do different sizes of graphene affect the water and chloride ion permeability resistance of cement-based materials, and by what means do they affect these properties? To address these issues, in this paper, two different sizes of graphene were used to prepare graphene dispersion, which was then mixed with cement to make graphene-reinforced cement-based materials. The permeability and microstructure of samples were investigated. Results show that the addition of graphene effectively improved both the water and chloride ion permeability resistance of cement-based materials significantly. The SEM (scanning electron microscope) images and XRD (X-ray diffraction) analysis show that the introduction of either type of graphene could effectively regulate the crystal size and morphology of hydration products and reduce the crystal size and the number of needle-like and rod-like hydration products. The main types of hydrated products are calcium hydroxide, ettringite, etc. The template effect of large-size graphene was more obvious, and a large number of regular flower-like cluster hydration products were formed, which made the structure of cement paste more compact and thus significantly improved the resistance to the penetration of water and chloride ions into the matrix of the concrete. MDPI 2023-05-22 /pmc/articles/PMC10222090/ /pubmed/37241508 http://dx.doi.org/10.3390/ma16103881 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Dong, Jianmiao
Zhuang, Jiaqiao
Li, Wanjin
Zou, Mingxuan
He, Qi
Luo, Shuqiong
Insights into the Mechanism of Graphene Acting on Water and Chloride Ion Permeability of Cement-Based Materials
title Insights into the Mechanism of Graphene Acting on Water and Chloride Ion Permeability of Cement-Based Materials
title_full Insights into the Mechanism of Graphene Acting on Water and Chloride Ion Permeability of Cement-Based Materials
title_fullStr Insights into the Mechanism of Graphene Acting on Water and Chloride Ion Permeability of Cement-Based Materials
title_full_unstemmed Insights into the Mechanism of Graphene Acting on Water and Chloride Ion Permeability of Cement-Based Materials
title_short Insights into the Mechanism of Graphene Acting on Water and Chloride Ion Permeability of Cement-Based Materials
title_sort insights into the mechanism of graphene acting on water and chloride ion permeability of cement-based materials
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10222090/
https://www.ncbi.nlm.nih.gov/pubmed/37241508
http://dx.doi.org/10.3390/ma16103881
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