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Microstructural Characterization of 3D Printed Concrete (2021-07)

10.1016/j.jobe.2021.102948

 Yu Shiwei,  Xia Ming,  Sanjayan Jay,  Yang Lin,  Xiao Jianzhuang,  Du Hongjian
Journal Article - Journal of Building Engineering, Vol. 44

Abstract

3D concrete printing technique offers a novel approach to build new infrastructure. However, the microstructure of 3D printed concrete has rarely been studied so far. This study presents the microstructural characterization of 3D printed concrete by using MIP and X-ray CT. The void size distribution reported in this study covers a wide spectrum. The mechanical performance of the 3D printed concrete, along different directions, is also investigated. This study reveals that a higher amount of macropores and large voids are present in the 3D printed samples, attributed to the movement of the printhead, elimination of vibration, and rapid moisture loss. Moreover, the morphologies of the voids are more irregular and elongated. This is more pronounced at the interlayer than in the filament. As a result, the strength of 3D printed samples is lower than that of mould-cast specimens.

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BibTeX 
@article{yu_xia_sanj_yang.2021.MCo3PC,
  author            = "Shiwei Yu and Ming Xia and Jay Gnananandan Sanjayan and Lin Yang and Jianzhuang Xiao and Hongjian Du",
  title             = "Microstructural Characterization of 3D Printed Concrete",
  doi               = "10.1016/j.jobe.2021.102948",
  year              = "2021",
  journal           = "Journal of Building Engineering",
  volume            = "44",
}
Formatted Citation

S. Yu, M. Xia, J. G. Sanjayan, L. Yang, J. Xiao and H. Du, “Microstructural Characterization of 3D Printed Concrete”, Journal of Building Engineering, vol. 44, 2021, doi: 10.1016/j.jobe.2021.102948.

Yu, Shiwei, Ming Xia, Jay Gnananandan Sanjayan, Lin Yang, Jianzhuang Xiao, and Hongjian Du. “Microstructural Characterization of 3D Printed Concrete”. Journal of Building Engineering 44 (2021). https://doi.org/10.1016/j.jobe.2021.102948.