Effect of hydration process on the interlayer bond tensile mechanical properties of ultra-high performance concrete for 3D printing

Yang, Y; Zhang, C; Liu, Z; Dong, L; Yang, T; Zhao, Q; Wu, C

Effect of hydration process on the interlayer bond tensile mechanical properties of ultra-high performance concrete for 3D printing

Yang, Y Zhang, C Liu, Z Dong, L Yang, T Zhao, Q Wu, C

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Construction and Building Materials, 2024, 451
Issue Date:: 2024-11-15

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Field	Value	Language
dc.contributor.author	Yang, Y
dc.contributor.author	Zhang, C
dc.contributor.author	Liu, Z
dc.contributor.author	Dong, L
dc.contributor.author	Yang, T
dc.contributor.author	Zhao, Q
dc.contributor.author	Wu, C https://orcid.org/0000-0001-8907-8493
dc.date.accessioned	2025-03-17T09:37:13Z
dc.date.available	2025-03-17T09:37:13Z
dc.date.issued	2024-11-15
dc.identifier.citation	Construction and Building Materials, 2024, 451
dc.identifier.issn	0950-0618
dc.identifier.issn	1879-0526
dc.identifier.uri	http://hdl.handle.net/10453/185937
dc.description.abstract	It is crucial to reveal interlayer interface characteristics for fully analysing the mechanical properties of 3D printed ultra-high performance concrete (3DP-UHPC). Despite its significance, the interlayer bonding behaviour of 3DP-UHPC has not been fully explored. To fill this gap, this study adopted different curing times and conditions to investigate the effect of hydration process on the interlayer microstructure and mechanical properties under different interlayer interval times. As the result show that, the interlayer microstructure remained dense for interval times less than 5 minutes, but interlayer gaps became increasingly apparent as the interval time exceeded this threshold. Promoting hydration, however, helped heal interlayer defects in 3DP-UHPC. Additionally, the interlayer bond tensile strength gradually decreased with increasing interval time but remained almost unchanged when the interval time exceeded 1 day. Notably, hot water bath curing enhanced the bond tensile strength of specimens with interval times within 60 minutes, but its improvement was insignificant for interval times exceeding 1 day. Based on these experimental results, a preliminary interlayer bond tensile stress-strain equation of 3DP-UHPC was derived. The findings of this study offer promising avenues for the improvement and promotion of 3DP-UHPC technology.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Construction and Building Materials
dc.relation.isbasedon	10.1016/j.conbuildmat.2024.138902
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 1202 Building
dc.subject.classification	Building & Construction
dc.subject.classification	3302 Building
dc.subject.classification	4005 Civil engineering
dc.subject.classification	4016 Materials engineering
dc.title	Effect of hydration process on the interlayer bond tensile mechanical properties of ultra-high performance concrete for 3D printing
dc.type	Journal Article
utslib.citation.volume	451
utslib.for	0905 Civil Engineering
utslib.for	1202 Building
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	University of Technology Sydney/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Built Infrastructure Resilience (CBIR)
utslib.copyright.status	closed_access	*
dc.date.updated	2025-03-17T09:37:05Z
pubs.publication-status	Published
pubs.volume	451

Abstract:

It is crucial to reveal interlayer interface characteristics for fully analysing the mechanical properties of 3D printed ultra-high performance concrete (3DP-UHPC). Despite its significance, the interlayer bonding behaviour of 3DP-UHPC has not been fully explored. To fill this gap, this study adopted different curing times and conditions to investigate the effect of hydration process on the interlayer microstructure and mechanical properties under different interlayer interval times. As the result show that, the interlayer microstructure remained dense for interval times less than 5 minutes, but interlayer gaps became increasingly apparent as the interval time exceeded this threshold. Promoting hydration, however, helped heal interlayer defects in 3DP-UHPC. Additionally, the interlayer bond tensile strength gradually decreased with increasing interval time but remained almost unchanged when the interval time exceeded 1 day. Notably, hot water bath curing enhanced the bond tensile strength of specimens with interval times within 60 minutes, but its improvement was insignificant for interval times exceeding 1 day. Based on these experimental results, a preliminary interlayer bond tensile stress-strain equation of 3DP-UHPC was derived. The findings of this study offer promising avenues for the improvement and promotion of 3DP-UHPC technology.

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http://hdl.handle.net/10453/185937