Novel experimental and numerical investigations on bonding behaviour of crack interface in smart self-healing concrete

Xue, C; Li, W; Wang, K; Sheng, D; Shah, SP; Shah, SP

Novel experimental and numerical investigations on bonding behaviour of crack interface in smart self-healing concrete

Xue, C Li, W

Wang, K Sheng, D

Shah, SP Shah, SP

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Publisher:: IOP PUBLISHING LTD
Publication Type:: Journal Article
Citation:: Smart Materials and Structures, 2020, 29, (8)
Issue Date:: 2020-08-01

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Field	Value	Language
dc.contributor.author	Xue, C
dc.contributor.author	Li, W https://orcid.org/0000-0002-4651-1215
dc.contributor.author	Wang, K
dc.contributor.author	Sheng, D https://orcid.org/0000-0002-1665-6931
dc.contributor.author	Shah, SP
dc.contributor.author	Shah, SP
dc.date.accessioned	2021-03-21T00:44:50Z
dc.date.available	2021-03-21T00:44:50Z
dc.date.issued	2020-08-01
dc.identifier.citation	Smart Materials and Structures, 2020, 29, (8)
dc.identifier.issn	0964-1726
dc.identifier.issn	1361-665X
dc.identifier.uri	http://hdl.handle.net/10453/147403
dc.description.abstract	© 2020 IOP Publishing Ltd. There are crack interfaces between self-healing agent and cement matrix in smart encapsulation-based self-healing concrete, whose mechanical properties significantly affects the load capacity recovery of crack-healed concrete. In this study, both experimental and numerical investigations were conducted on the crack-healed concrete under uniaxial tension to investigate the interface bonding behaviours and the self-healing agent distribution on the crack surface. The results show that the bonding behaviour of the crack interface depends on the content of healing agent and mechanical properties of the crack surface. However, it is still difficult to accurately understand their effects on the bonding behaviour by experimental investigation due to the high brittleness of the crack interface and the discrepancy of self-healing concrete. Therefore, based on the experimental results, a novel numerical model of the interface between self-healing agent and cement matrix was developed to investigate effects of aggregates, pores and interface properties on the bonding behaviour of crack interface by the cohesive surface technique (CS). Parametric analysis was also performed on the bonding behaviours and a method was proposed for assessing the load capacity of crack-healed concrete. Based on the experimental and numerical investigations on the healing agent-concrete crack interface in the smart encapsulation-based self-healing concrete, this novel numericla methods can be used to assess the recovery efficiency and performance of smart self-healing concrete structure.
dc.language	English
dc.publisher	IOP PUBLISHING LTD
dc.relation	http://purl.org/au-research/grants/arc/DE150101751
dc.relation.ispartof	Smart Materials and Structures
dc.relation.isbasedon	http://dx.doi.org/10.1088/1361-665X/ab8eb6
dc.rights	info:eu-repo/semantics/closedAccess
dc.rights	This is an author-created, un-copyedited version of an article accepted for publication in Smart Materials and Structures. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher-authenticated version is available online at http://dx.doi.org/10.1088/1361-665X/ab8eb6.	en_US
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Materials
dc.title	Novel experimental and numerical investigations on bonding behaviour of crack interface in smart self-healing concrete
dc.type	Journal Article
utslib.citation.volume	29
utslib.for	0905 Civil Engineering
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
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/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
dc.date.updated	2021-03-21T00:44:46Z
pubs.issue	8
pubs.publication-status	Published
pubs.volume	29
utslib.citation.issue	8

Abstract:

© 2020 IOP Publishing Ltd. There are crack interfaces between self-healing agent and cement matrix in smart encapsulation-based self-healing concrete, whose mechanical properties significantly affects the load capacity recovery of crack-healed concrete. In this study, both experimental and numerical investigations were conducted on the crack-healed concrete under uniaxial tension to investigate the interface bonding behaviours and the self-healing agent distribution on the crack surface. The results show that the bonding behaviour of the crack interface depends on the content of healing agent and mechanical properties of the crack surface. However, it is still difficult to accurately understand their effects on the bonding behaviour by experimental investigation due to the high brittleness of the crack interface and the discrepancy of self-healing concrete. Therefore, based on the experimental results, a novel numerical model of the interface between self-healing agent and cement matrix was developed to investigate effects of aggregates, pores and interface properties on the bonding behaviour of crack interface by the cohesive surface technique (CS). Parametric analysis was also performed on the bonding behaviours and a method was proposed for assessing the load capacity of crack-healed concrete. Based on the experimental and numerical investigations on the healing agent-concrete crack interface in the smart encapsulation-based self-healing concrete, this novel numericla methods can be used to assess the recovery efficiency and performance of smart self-healing concrete structure.

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http://hdl.handle.net/10453/147403