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

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631 Citations (Scopus)


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
Publication statusPublished - Apr 2015


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

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