Mechanical properties and microstructure of a graphene oxide-cement composite

Zhu Pan, Li He, Ling Qiu, Asghar Habibnejad Korayem, Gang Li, Junwu Zhu, Francis Gerard Collins, Dan Li, Wenhui Duan, Chien Ming Wang

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Graphene oxide (GO) is the product of chemical exfoliation of graphite. Due to its good dispersibility in water, high aspect ratio and excellent mechanical properties, GO is a potential candidate for use as nanoreinforcements in cement-based materials. In this paper, GO was used to enhance the mechanical properties of ordinary Portland cement paste. The introduction of 0.05 wt% GO can increase the GO-cement composite compressive strength by 15-33% and the flexural strength by 41-59% , respectively. Scanning electron microscope imaging of the GO-cement composite shows the high crack tortuosity, indicating that the two-dimensional GO sheet may form a barrier to crack propagation. Consequently, the GO-cement composite shows a broader stress-strain curve within the post-peak zone, leading to a less sudden failure. The addition of GO also increases the surface area of the GO-cement composite. This is attributed to increasing the production of calcium silicate hydrate. The results obtained in this investigation suggest that GO has potential for being used as nano-reinforcements in cement-based composite materials.
Original languageEnglish
Pages (from-to)140 - 147
Number of pages8
JournalCement and Concrete Composites
Volume58
DOIs
Publication statusPublished - Apr 2015

Keywords

  • Graphene oxide
  • Portland cement
  • Compressive strength
  • Flexural strength
  • Microstructure

Cite this

Pan, Zhu ; He, Li ; Qiu, Ling ; Habibnejad Korayem, Asghar ; Li, Gang ; Zhu, Junwu ; Collins, Francis Gerard ; Li, Dan ; Duan, Wenhui ; Wang, Chien Ming. / Mechanical properties and microstructure of a graphene oxide-cement composite. In: Cement and Concrete Composites. 2015 ; Vol. 58. pp. 140 - 147.
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abstract = "Graphene oxide (GO) is the product of chemical exfoliation of graphite. Due to its good dispersibility in water, high aspect ratio and excellent mechanical properties, GO is a potential candidate for use as nanoreinforcements in cement-based materials. In this paper, GO was used to enhance the mechanical properties of ordinary Portland cement paste. The introduction of 0.05 wt{\%} GO can increase the GO-cement composite compressive strength by 15-33{\%} and the flexural strength by 41-59{\%} , respectively. Scanning electron microscope imaging of the GO-cement composite shows the high crack tortuosity, indicating that the two-dimensional GO sheet may form a barrier to crack propagation. Consequently, the GO-cement composite shows a broader stress-strain curve within the post-peak zone, leading to a less sudden failure. The addition of GO also increases the surface area of the GO-cement composite. This is attributed to increasing the production of calcium silicate hydrate. The results obtained in this investigation suggest that GO has potential for being used as nano-reinforcements in cement-based composite materials.",
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Mechanical properties and microstructure of a graphene oxide-cement composite. / Pan, Zhu; He, Li; Qiu, Ling; Habibnejad Korayem, Asghar; Li, Gang; Zhu, Junwu; Collins, Francis Gerard; Li, Dan; Duan, Wenhui; Wang, Chien Ming.

In: Cement and Concrete Composites, Vol. 58, 04.2015, p. 140 - 147.

Research output: Contribution to journalArticleResearchpeer-review

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AU - He, Li

AU - Qiu, Ling

AU - Habibnejad Korayem, Asghar

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AU - Zhu, Junwu

AU - Collins, Francis Gerard

AU - Li, Dan

AU - Duan, Wenhui

AU - Wang, Chien Ming

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