Mechanical properties and microstructure of a graphene oxide-cement composite

Pan, Zhu, He, Li, Qiu, Ling, Korayem, Asghar Habibnejad, Li, Gang, Zhu, Jun Wu, Collins, Frank, Li, Dan, Duan, Wen Hui and Wang, Ming Chien (2015) Mechanical properties and microstructure of a graphene oxide-cement composite. Cement and Concrete Composites, 58 140-147. doi:10.1016/j.cemconcomp.2015.02.001

Author Pan, Zhu
He, Li
Qiu, Ling
Korayem, Asghar Habibnejad
Li, Gang
Zhu, Jun Wu
Collins, Frank
Li, Dan
Duan, Wen Hui
Wang, Ming Chien
Title Mechanical properties and microstructure of a graphene oxide-cement composite
Journal name Cement and Concrete Composites   Check publisher's open access policy
ISSN 0958-9465
Publication date 2015-04-01
Sub-type Article (original research)
DOI 10.1016/j.cemconcomp.2015.02.001
Open Access Status Not yet assessed
Volume 58
Start page 140
End page 147
Total pages 8
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
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.
Keyword Compressive strength
Flexural strength
Graphene oxide
Portland cement
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
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Created: Tue, 17 Jan 2017, 01:09:54 EST by Clare Nelson on behalf of Learning and Research Services (UQ Library)