Effect of calcined clay reactivity on the risk of restrained shrinkage-induced early-age concrete cracking

Canda, E; Nguyen, QD; San Nicolas, R; Rasekh, H; Castel, A

Effect of calcined clay reactivity on the risk of restrained shrinkage-induced early-age concrete cracking

Canda, E

Nguyen, QD San Nicolas, R Rasekh, H

Castel, A

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Publisher:: ERNST & SOHN
Publication Type:: Journal Article
Citation:: Structural Concrete, 2025
Issue Date:: 2025-01-01

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Field	Value	Language
dc.contributor.author	Canda, E https://orcid.org/0009-0008-3276-2399
dc.contributor.author	Nguyen, QD
dc.contributor.author	San Nicolas, R
dc.contributor.author	Rasekh, H https://orcid.org/0000-0003-2064-0753
dc.contributor.author	Castel, A https://orcid.org/0000-0003-1619-9643
dc.date.accessioned	2025-04-24T05:21:50Z
dc.date.available	2025-04-24T05:21:50Z
dc.date.issued	2025-01-01
dc.identifier.citation	Structural Concrete, 2025
dc.identifier.issn	1464-4177
dc.identifier.issn	1751-7648
dc.identifier.uri	http://hdl.handle.net/10453/187033
dc.description.abstract	A combination of limestone and calcined clay has emerged as a promising supplementary cementitious material due to its abundant availability to replace traditional supplementary cementitious materials such as fly ash or ground-granulated blast-furnace slag in reducing concrete's carbon footprint. Although different properties have been considered, very limited attention was paid to the early-age cracking behavior of limestone calcined clay cement (LC3) concretes. This study aims to investigate the influence of calcined clay reactivity on the early-age cracking potential of LC3 concretes using the restrained ring test. Mechanical properties, time to cracking, tensile creep coefficient, and total shrinkage were measured. Results showed that the reactivity of calcined clay significantly impacted total shrinkage, creep coefficients, and time to cracking. LC3 concretes exhibited higher tensile creep coefficients than pure ordinary Portland cement concrete, which can provide beneficial tensile stress relaxation delaying concrete cracking. An apparent calcined clay reactivity coefficient (Rapp) was proposed correlating well with the time to cracking of the restrained LC3 concrete rings, thus offering practical guidance for the selection of suitable calcined clays and mix designs for specific high-risk applications.
dc.language	English
dc.publisher	ERNST & SOHN
dc.relation	http://purl.org/au-research/grants/arc/LP170100912
dc.relation	BORAL SHARED BUSINESS SERVICES PTY LTDNone
dc.relation.ispartof	Structural Concrete
dc.relation.isbasedon	10.1002/suco.202301131
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0905 Civil Engineering
dc.subject.classification	Civil Engineering
dc.subject.classification	4005 Civil engineering
dc.subject.classification	4016 Materials engineering
dc.title	Effect of calcined clay reactivity on the risk of restrained shrinkage-induced early-age concrete cracking
dc.type	Journal Article
utslib.for	0905 Civil 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/Faculty of Engineering and Information Technology/School of Professional Practice and Leadership
pubs.organisational-group	University of Technology Sydney/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Transport Research Centre (TRC)
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/
dc.date.updated	2025-04-24T05:21:27Z
pubs.publication-status	Published

Abstract:

A combination of limestone and calcined clay has emerged as a promising supplementary cementitious material due to its abundant availability to replace traditional supplementary cementitious materials such as fly ash or ground-granulated blast-furnace slag in reducing concrete's carbon footprint. Although different properties have been considered, very limited attention was paid to the early-age cracking behavior of limestone calcined clay cement (LC3) concretes. This study aims to investigate the influence of calcined clay reactivity on the early-age cracking potential of LC3 concretes using the restrained ring test. Mechanical properties, time to cracking, tensile creep coefficient, and total shrinkage were measured. Results showed that the reactivity of calcined clay significantly impacted total shrinkage, creep coefficients, and time to cracking. LC3 concretes exhibited higher tensile creep coefficients than pure ordinary Portland cement concrete, which can provide beneficial tensile stress relaxation delaying concrete cracking. An apparent calcined clay reactivity coefficient (Rapp) was proposed correlating well with the time to cracking of the restrained LC3 concrete rings, thus offering practical guidance for the selection of suitable calcined clays and mix designs for specific high-risk applications.

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http://hdl.handle.net/10453/187033