Risk of early age cracking in geopolymer concrete due to restrained shrinkage

Khan, I; Xu, T; Castel, A; Gilbert, RI; Babaee, M

Risk of early age cracking in geopolymer concrete due to restrained shrinkage

Khan, I Xu, T Castel, A

Gilbert, RI Babaee, M

Permalink

Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Construction and Building Materials, 2019, 229
Issue Date:: 2019-12-30

Closed Access

	Filename	Description	Size
	1-s2.0-S0950061819322767-main.pdf	Published version	1.94 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Khan, I
dc.contributor.author	Xu, T
dc.contributor.author	Castel, A https://orcid.org/0000-0003-1619-9643
dc.contributor.author	Gilbert, RI
dc.contributor.author	Babaee, M
dc.date.accessioned	2020-05-13T06:51:21Z
dc.date.available	2020-05-13T06:51:21Z
dc.date.issued	2019-12-30
dc.identifier.citation	Construction and Building Materials, 2019, 229
dc.identifier.issn	0950-0618
dc.identifier.issn	0950-0618
dc.identifier.uri	http://hdl.handle.net/10453/140689
dc.description.abstract	© 2019 Elsevier Ltd In this paper, experimental tests were carried out in order to measure early-age shrinkage and tensile creep of geopolymer concrete and assess their influence on early age cracking in reinforced concrete members. Two mixes of geopolymer concrete were tested. For the first mix, the specimens were heat-cured at a temperature of either 60 °C or 90 °C. For the second mix, the specimens were cured under ambient conditions. Tensile creep was directly measured using unreinforced dog-bone shaped specimens subjected to sustained axial tension. The shrinkage induced stress tests were performed on restrained geopolymer concrete rings. The results show that the tensile creep coefficient and shrinkage strains in geopolymer concrete are affected by the curing temperature and duration. Higher curing temperature leads to less tensile creep and shrinkage strains. Heat-cured geopolymer concrete demonstrated a lower early-age shrinkage and higher tensile creep coefficient, compared to the control ordinary Portland cement (OPC) concrete. Both restrained ring test and simulations confirm that heat-cured geopolymer concrete can relax undesirable stresses in concrete caused by restrained shrinkage, and reduce the risk of early-age cracking.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Construction and Building Materials
dc.relation.isbasedon	10.1016/j.conbuildmat.2019.116840
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0905 Civil Engineering, 1202 Building
dc.subject.classification	Building & Construction
dc.title	Risk of early age cracking in geopolymer concrete due to restrained shrinkage
dc.type	Journal Article
utslib.citation.volume	229
utslib.for	0905 Civil Engineering
utslib.for	1202 Building
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
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2020-05-13T06:51:19Z
pubs.publication-status	Published
pubs.volume	229

Abstract:

© 2019 Elsevier Ltd In this paper, experimental tests were carried out in order to measure early-age shrinkage and tensile creep of geopolymer concrete and assess their influence on early age cracking in reinforced concrete members. Two mixes of geopolymer concrete were tested. For the first mix, the specimens were heat-cured at a temperature of either 60 °C or 90 °C. For the second mix, the specimens were cured under ambient conditions. Tensile creep was directly measured using unreinforced dog-bone shaped specimens subjected to sustained axial tension. The shrinkage induced stress tests were performed on restrained geopolymer concrete rings. The results show that the tensile creep coefficient and shrinkage strains in geopolymer concrete are affected by the curing temperature and duration. Higher curing temperature leads to less tensile creep and shrinkage strains. Heat-cured geopolymer concrete demonstrated a lower early-age shrinkage and higher tensile creep coefficient, compared to the control ordinary Portland cement (OPC) concrete. Both restrained ring test and simulations confirm that heat-cured geopolymer concrete can relax undesirable stresses in concrete caused by restrained shrinkage, and reduce the risk of early-age cracking.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/140689