Development of sustainable concrete incorporating seawater: A critical review on cement hydration, microstructure and mechanical strength

Li, P; Li, W; Sun, Z; Shen, L; Sheng, D

Development of sustainable concrete incorporating seawater: A critical review on cement hydration, microstructure and mechanical strength

Li, P Li, W

Sun, Z Shen, L Sheng, D

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Cement and Concrete Composites, 2021, 121
Issue Date:: 2021-08-01

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Field	Value	Language
dc.contributor.author	Li, P
dc.contributor.author	Li, W https://orcid.org/0000-0002-4651-1215
dc.contributor.author	Sun, Z
dc.contributor.author	Shen, L
dc.contributor.author	Sheng, D https://orcid.org/0000-0002-1665-6931
dc.date.accessioned	2022-04-15T20:32:53Z
dc.date.available	2022-04-15T20:32:53Z
dc.date.issued	2021-08-01
dc.identifier.citation	Cement and Concrete Composites, 2021, 121
dc.identifier.issn	0958-9465
dc.identifier.issn	1873-393X
dc.identifier.uri	http://hdl.handle.net/10453/156291
dc.description.abstract	Many countries are experiencing freshwater crises due to the increasing growth of the population together with the infrastructure construction that is aligned with the needs of freshwater for concrete production. There are also deficiencies in freshwater in many coastal areas where seawater is more accessible. To reduce unnecessary resource-wasting and meanwhile drive sustainable development in the construction industry, great efforts have been made to utilize seawater as the alternative mixing water for concrete casting, which presents potential economical and environmental benefits in the coastal and island regions. This paper comprehensively reviews the current studies on the predominant performance differences between seawater-mixed and conventional concretes with freshwater. Particular attention is paid to the chloride-induced hydration mechanism due to the chloride ions in seawater. The main findings of this review reveal that although harmful ingredients in seawater may weaken some of the concrete performances, applying proper curing conditions and adding moderate additives and admixtures could significantly and effectively mitigate these defects in properties. However, the unstable chloride binding ability in cement hydrates cannot eliminate the risk of rebar corrosion caused by chlorides in seawater, resulting in a limited scope of practical application. Finally, some trade-offs are recommended in using seawater in concrete, suggesting prospects of applications in the future construction industry. This study guides for the safer use of seawater in sustainable concrete through reviewing the advanced research progress.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation	http://purl.org/au-research/grants/arc/DE150101751
dc.relation	http://purl.org/au-research/grants/arc/IH180100010
dc.relation.ispartof	Cement and Concrete Composites
dc.relation.isbasedon	10.1016/j.cemconcomp.2021.104100
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 1202 Building
dc.subject.classification	Building & Construction
dc.title	Development of sustainable concrete incorporating seawater: A critical review on cement hydration, microstructure and mechanical strength
dc.type	Journal Article
utslib.citation.volume	121
utslib.for	0904 Chemical Engineering
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
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
dc.date.updated	2022-04-15T20:32:51Z
pubs.publication-status	Published
pubs.volume	121

Abstract:

Many countries are experiencing freshwater crises due to the increasing growth of the population together with the infrastructure construction that is aligned with the needs of freshwater for concrete production. There are also deficiencies in freshwater in many coastal areas where seawater is more accessible. To reduce unnecessary resource-wasting and meanwhile drive sustainable development in the construction industry, great efforts have been made to utilize seawater as the alternative mixing water for concrete casting, which presents potential economical and environmental benefits in the coastal and island regions. This paper comprehensively reviews the current studies on the predominant performance differences between seawater-mixed and conventional concretes with freshwater. Particular attention is paid to the chloride-induced hydration mechanism due to the chloride ions in seawater. The main findings of this review reveal that although harmful ingredients in seawater may weaken some of the concrete performances, applying proper curing conditions and adding moderate additives and admixtures could significantly and effectively mitigate these defects in properties. However, the unstable chloride binding ability in cement hydrates cannot eliminate the risk of rebar corrosion caused by chlorides in seawater, resulting in a limited scope of practical application. Finally, some trade-offs are recommended in using seawater in concrete, suggesting prospects of applications in the future construction industry. This study guides for the safer use of seawater in sustainable concrete through reviewing the advanced research progress.

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http://hdl.handle.net/10453/156291