Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/148261
Title: Synchronized concrete and bonding agent deposition system for interlayer bond strength enhancement in 3D concrete printing
Authors: Weng, Yiwei
Li, Mingyang
Wong, Teck Neng
Tan, Ming Jen
Keywords: Engineering
Issue Date: 2021
Source: Weng, Y., Li, M., Wong, T. N. & Tan, M. J. (2021). Synchronized concrete and bonding agent deposition system for interlayer bond strength enhancement in 3D concrete printing. Automation in Construction, 123, 103546-. https://dx.doi.org/10.1016/j.autcon.2020.103546
Journal: Automation in Construction 
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.
URI: https://hdl.handle.net/10356/148261
ISSN: 0926-5805
DOI: 10.1016/j.autcon.2020.103546
Rights: © 2021 Elsevier B.V. All rights reserved. This paper was published in Automation in Construction and is made available with permission of Elsevier B.V.
Fulltext Permission: embargo_20230331
Fulltext Availability: With Fulltext
Appears in Collections:SC3DP Journal Articles

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