Effects of fly ash on early-age properties and cracking of concrete

Khan, I; Castel, A; Gilbert, RI

Effects of fly ash on early-age properties and cracking of concrete

Khan, I Castel, A

Gilbert, RI

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Publisher:: American Concrete Institute
Publication Type:: Journal Article
Citation:: ACI Materials Journal, 2017, 114, (4), pp. 673-681
Issue Date:: 2017-07-01

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Field	Value	Language
dc.contributor.author	Khan, I
dc.contributor.author	Castel, A https://orcid.org/0000-0003-1619-9643
dc.contributor.author	Gilbert, RI
dc.date.accessioned	2022-08-01T06:38:41Z
dc.date.available	2022-08-01T06:38:41Z
dc.date.issued	2017-07-01
dc.identifier.citation	ACI Materials Journal, 2017, 114, (4), pp. 673-681
dc.identifier.issn	0889-325X
dc.identifier.issn	1944-737X
dc.identifier.uri	http://hdl.handle.net/10453/159437
dc.description.abstract	This paper focuses on the effects of fly ash on early-age mechanical and viscoelastic properties of concrete and on early-age cracking. Fly ash is a supplementary cementitious material that is mainly used to increase the durability of concrete. The effect on shrinkage-induced cracking of replacing some ordinary portland cement (OPC) with fly ash has not been studied previously. Material properties such as compressive strength, indirect tensile strength, and elastic modulus were measured with different percentage replacements of OPC with fly ash. Tensile creep and drying shrinkage were also measured on two types of specimens by using two different experimental techniques. The cracking age of plain concrete was observed by using a restrained ring test. Results revealed that the strength evolution of fly-ash-blended concrete is lower than the corresponding OPC concrete and the age at which restrained shrinkage cracking first occurs is also reduced. Slightly higher tensile creep coefficients were observed for fly-ash-blended concrete compared to OPC concrete, but drying shrinkage was not altered to any great extent.
dc.language	English
dc.publisher	American Concrete Institute
dc.relation.ispartof	ACI Materials Journal
dc.relation.isbasedon	10.14359/51689898
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0912 Materials Engineering, 1202 Building
dc.subject.classification	Building & Construction
dc.title	Effects of fly ash on early-age properties and cracking of concrete
dc.type	Journal Article
utslib.citation.volume	114
utslib.for	0905 Civil Engineering
utslib.for	0912 Materials 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
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2022-08-01T06:38:39Z
pubs.issue	4
pubs.publication-status	Published
pubs.volume	114
utslib.citation.issue	4

Abstract:

This paper focuses on the effects of fly ash on early-age mechanical and viscoelastic properties of concrete and on early-age cracking. Fly ash is a supplementary cementitious material that is mainly used to increase the durability of concrete. The effect on shrinkage-induced cracking of replacing some ordinary portland cement (OPC) with fly ash has not been studied previously. Material properties such as compressive strength, indirect tensile strength, and elastic modulus were measured with different percentage replacements of OPC with fly ash. Tensile creep and drying shrinkage were also measured on two types of specimens by using two different experimental techniques. The cracking age of plain concrete was observed by using a restrained ring test. Results revealed that the strength evolution of fly-ash-blended concrete is lower than the corresponding OPC concrete and the age at which restrained shrinkage cracking first occurs is also reduced. Slightly higher tensile creep coefficients were observed for fly-ash-blended concrete compared to OPC concrete, but drying shrinkage was not altered to any great extent.

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http://hdl.handle.net/10453/159437