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dc.contributor.authorWeng, Yiweien_US
dc.contributor.authorLi, Mingyangen_US
dc.contributor.authorWong, Teck Nengen_US
dc.contributor.authorTan, Ming Jenen_US
dc.identifier.citationWeng, 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-.
dc.description.abstractA 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.en_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.relation.ispartofAutomation in Constructionen_US
dc.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.en_US
dc.titleSynchronized concrete and bonding agent deposition system for interlayer bond strength enhancement in 3D concrete printingen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.contributor.researchSingapore Centre for 3D Printingen_US
dc.description.versionAccepted versionen_US
dc.subject.keywords3D Concrete Printingen_US
dc.subject.keywordsAdditive Manufacturingen_US
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