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Synchronized Concrete and Bonding-Agent-Deposition-System for Inter-Layer Bond Strength Enhancement in 3D Concrete Printing (2021-01)

10.1016/j.autcon.2020.103546

 Weng Yiwei,  Li Mingyang,  Wong Teck,  Tan Ming
Journal Article - Automation in Construction, Vol. 123

Abstract

A synchronized concrete and bonding agent deposition system is proposed to address the weak interlayer bond strength issue in extrusion-based 3D concrete printing (3DCP). In the proposed system, printable concrete and bonding agent are deposited concurrently via a rotatable nozzle with two outlets. Therefore, the interlayer bond strength is improved by the bonding agent deposited on the interface between printed filaments. Various bonding agents, including water, cement strengthener, polymer solution, and cement paste, were investigated. The results indicate that when the cement paste with a 0.26 water-to-cement mass ratio is adopted as the bonding agent, a relative bond strength as high as 267% can be obtained via the proposed system. Continuous printing was conducted to demonstrate that the proposed system has great potential for practical engineering applications. The proposed system has the potential to eliminate the weakness in interlayer bond strength of 3DCP processes and to widen 3DCP applications.

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BibTeX
@article{weng_li_wong_tan.2021.SCaBADSfILBSEi3CP,
  author            = "Yiwei Weng and Mingyang Li and Teck Neng Wong and Ming Jen Tan",
  title             = "Synchronized Concrete and Bonding-Agent-Deposition-System for Inter-Layer Bond Strength Enhancement in 3D Concrete Printing",
  doi               = "10.1016/j.autcon.2020.103546",
  year              = "2021",
  journal           = "Automation in Construction",
  volume            = "123",
}
Formatted Citation

Y. Weng, M. Li, T. N. Wong and M. J. Tan, “Synchronized Concrete and Bonding-Agent-Deposition-System for Inter-Layer Bond Strength Enhancement in 3D Concrete Printing”, Automation in Construction, vol. 123, 2021, doi: 10.1016/j.autcon.2020.103546.

Weng, Yiwei, Mingyang Li, Teck Neng Wong, and Ming Jen Tan. “Synchronized Concrete and Bonding-Agent-Deposition-System for Inter-Layer Bond Strength Enhancement in 3D Concrete Printing”. Automation in Construction 123 (2021). https://doi.org/10.1016/j.autcon.2020.103546.