Autogenous shrinkage of fly ash and ground granulated blast furnace slag concrete

Zhang, Y; Afroz, S; Quang, DN; Kim, T; Duy, N; Castel, A; Nairn, J; Gilbert, RI

Autogenous shrinkage of fly ash and ground granulated blast furnace slag concrete

Zhang, Y Afroz, S Quang, DN Kim, T Duy, N Castel, A

Nairn, J Gilbert, RI

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Publisher:: ICE PUBLISHING
Publication Type:: Journal Article
Citation:: MAGAZINE OF CONCRETE RESEARCH, 2022
Issue Date:: 2022-08-19

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Field	Value	Language
dc.contributor.author	Zhang, Y
dc.contributor.author	Afroz, S
dc.contributor.author	Quang, DN
dc.contributor.author	Kim, T
dc.contributor.author	Duy, N
dc.contributor.author	Castel, A https://orcid.org/0000-0003-1619-9643
dc.contributor.author	Nairn, J
dc.contributor.author	Gilbert, RI
dc.date.accessioned	2023-01-31T03:19:08Z
dc.date.available	2023-01-31T03:19:08Z
dc.date.issued	2022-08-19
dc.identifier.citation	MAGAZINE OF CONCRETE RESEARCH, 2022
dc.identifier.issn	0024-9831
dc.identifier.issn	1751-763X
dc.identifier.uri	http://hdl.handle.net/10453/165667
dc.description.abstract	<jats:p> Supplementary cementitious materials (SCMs) are widely used to reduce the cement content to achieve economic and environmental objectives. As a result, understanding the shrinkage of blended cement-based concrete is essential. In total, 21 concrete mixes were produced with type general purpose cement and with cement replacements of 30% by fly ash, 40% and 60% by ground granulated blast furnace slag (GGBFS). The concrete compressive strength ranged from 25 MPa to 100 MPa. Experimental results were also compared with the predictions by models. Additional tests on pastes with the same SCM content were conducted to investigate both autogenous and chemical shrinkage in relation to their time-dependent pore structure refinement. For concretes with strength below 50 MPa, no significant difference in autogenous shrinkage could be observed between the different blends up to 28 days. However, the autogenous shrinkage of GGBFS concrete increased significantly after 28 days, being about 50% higher than all other concretes at 100 days. This late increase in autogenous shrinkage between 28 and 100 days can be attributed to pore refinement processes. No clear difference was observed for GGBFS concretes with strength greater than 50 MPa. Autogenous shrinkage of fly ash concretes was overall equivalent to that of reference concretes. </jats:p>
dc.language	English
dc.publisher	ICE PUBLISHING
dc.relation	http://purl.org/au-research/grants/arc/LP170100912
dc.relation.ispartof	MAGAZINE OF CONCRETE RESEARCH
dc.relation.isbasedon	10.1680/jmacr.21.00300
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 1202 Building
dc.subject.classification	Building & Construction
dc.title	Autogenous shrinkage of fly ash and ground granulated blast furnace slag concrete
dc.type	Journal Article
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
utslib.copyright.status	closed_access	*
dc.date.updated	2023-01-31T03:19:06Z
pubs.publication-status	Published

Abstract:

Supplementary cementitious materials (SCMs) are widely used to reduce the cement content to achieve economic and environmental objectives. As a result, understanding the shrinkage of blended cement-based concrete is essential. In total, 21 concrete mixes were produced with type general purpose cement and with cement replacements of 30% by fly ash, 40% and 60% by ground granulated blast furnace slag (GGBFS). The concrete compressive strength ranged from 25 MPa to 100 MPa. Experimental results were also compared with the predictions by models. Additional tests on pastes with the same SCM content were conducted to investigate both autogenous and chemical shrinkage in relation to their time-dependent pore structure refinement. For concretes with strength below 50 MPa, no significant difference in autogenous shrinkage could be observed between the different blends up to 28 days. However, the autogenous shrinkage of GGBFS concrete increased significantly after 28 days, being about 50% higher than all other concretes at 100 days. This late increase in autogenous shrinkage between 28 and 100 days can be attributed to pore refinement processes. No clear difference was observed for GGBFS concretes with strength greater than 50 MPa. Autogenous shrinkage of fly ash concretes was overall equivalent to that of reference concretes.

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http://hdl.handle.net/10453/165667