Precision of cement hydration heat models in capturing the effects of SCMs and retarders

Chaei, MG; Akbarnezhad, A; Castel, A; Lloyd, R; Keyte, L; Foster, S

Precision of cement hydration heat models in capturing the effects of SCMs and retarders

Chaei, MG Akbarnezhad, A Castel, A

Lloyd, R Keyte, L Foster, S

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Publisher:: ICE PUBLISHING
Publication Type:: Journal Article
Citation:: Magazine of Concrete Research, 2018, 70, (23), pp. 1217-1231
Issue Date:: 2018-12-01

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Field	Value	Language
dc.contributor.author	Chaei, MG
dc.contributor.author	Akbarnezhad, A
dc.contributor.author	Castel, A https://orcid.org/0000-0003-1619-9643
dc.contributor.author	Lloyd, R
dc.contributor.author	Keyte, L
dc.contributor.author	Foster, S
dc.date.accessioned	2022-08-26T03:33:26Z
dc.date.available	2022-08-26T03:33:26Z
dc.date.issued	2018-12-01
dc.identifier.citation	Magazine of Concrete Research, 2018, 70, (23), pp. 1217-1231
dc.identifier.issn	0024-9831
dc.identifier.issn	1751-763X
dc.identifier.uri	http://hdl.handle.net/10453/160894
dc.description.abstract	A major input to numerical simulation models used to predict the risk of early-age thermal cracking in concrete is the hydration heat estimation. The precision of hydration heat estimation models has been extensively verified for different cement compositions in previous studies. However, little has been done to investigate the accuracy of such models for concrete mixes containing supplementary cementitious materials and retarders. This paper presents the results of a series of isothermal calorimetry tests conducted first to investigate the effects of Class F fly ash, groundgranulated blast-furnace slag (GGBFS) and three commonly used retarders (namely, retarder N, sucrose and citrate) on the heat of hydration profile of Australian general-purpose cement under different curing temperatures of 10, 23 and 30°C, and second to evaluate the precision of the two most commonly used hydration heat models in capturing the effects of fly ash, GGBFS, retarders and curing temperature on the hydration profile. The results reveal the possibility of considerable errors in estimating the hydration heat of concrete mixes containing supplementary cementitious materials and retarders under different curing temperatures, highlighting the need for re-calibration of the existing models for locally used materials to avoid misleading errors in numerical simulation of early-age thermal cracking.
dc.language	English
dc.publisher	ICE PUBLISHING
dc.relation.ispartof	Magazine of Concrete Research
dc.relation.isbasedon	10.1680/jmacr.17.00228
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 1202 Building
dc.subject.classification	Building & Construction
dc.title	Precision of cement hydration heat models in capturing the effects of SCMs and retarders
dc.type	Journal Article
utslib.citation.volume	70
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	2022-08-26T03:33:24Z
pubs.issue	23
pubs.publication-status	Published
pubs.volume	70
utslib.citation.issue	23

Abstract:

A major input to numerical simulation models used to predict the risk of early-age thermal cracking in concrete is the hydration heat estimation. The precision of hydration heat estimation models has been extensively verified for different cement compositions in previous studies. However, little has been done to investigate the accuracy of such models for concrete mixes containing supplementary cementitious materials and retarders. This paper presents the results of a series of isothermal calorimetry tests conducted first to investigate the effects of Class F fly ash, groundgranulated blast-furnace slag (GGBFS) and three commonly used retarders (namely, retarder N, sucrose and citrate) on the heat of hydration profile of Australian general-purpose cement under different curing temperatures of 10, 23 and 30°C, and second to evaluate the precision of the two most commonly used hydration heat models in capturing the effects of fly ash, GGBFS, retarders and curing temperature on the hydration profile. The results reveal the possibility of considerable errors in estimating the hydration heat of concrete mixes containing supplementary cementitious materials and retarders under different curing temperatures, highlighting the need for re-calibration of the existing models for locally used materials to avoid misleading errors in numerical simulation of early-age thermal cracking.

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http://hdl.handle.net/10453/160894