Durability and Microstructure Properties of Low-Carbon Concrete Incorporating Ferronickel Slag Sand and Fly Ash

Nguyen, QD; Khan, MSH; Castel, A; Kim, T

Durability and Microstructure Properties of Low-Carbon Concrete Incorporating Ferronickel Slag Sand and Fly Ash

Nguyen, QD

Khan, MSH Castel, A

Kim, T

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Publication Type:: Journal Article
Citation:: Journal of Materials in Civil Engineering, 2019, 31 (8)
Issue Date:: 2019-08-01

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Field	Value	Language
dc.contributor.author	Nguyen, QD https://orcid.org/0000-0002-0213-6652	en_US
dc.contributor.author	Khan, MSH	en_US
dc.contributor.author	Castel, A https://orcid.org/0000-0003-1619-9643	en_US
dc.contributor.author	Kim, T	en_US
dc.date.issued	2019-08-01	en_US
dc.identifier.citation	Journal of Materials in Civil Engineering, 2019, 31 (8)	en_US
dc.identifier.issn	0899-1561	en_US
dc.identifier.uri	http://hdl.handle.net/10453/138445
dc.description.abstract	© 2019 American Society of Civil Engineers. Ferronickel slag (FNS) which is also known as electric arc furnace slag is a byproduct of the production of ferronickel alloy. The production of FNS at Société Le Nickel (SLN) in New Caledonia is about 2 Mt per year with an existing stockpile of 25 Mt, which presents an excellent potential for concrete applications in the Pacific region. The possibility of using FNS from SLN as fine aggregate replacement in concrete is investigated. The low-carbon-concrete mix design includes 50% natural sand replacement by FNS sand and 25% ordinary portland cement substitution by fly ash. Microstructural analysis by scanning electron microscopy - energy dispersive X-ray spectrometer (SEM-EDS) of the interface transition zone (ITZ) of FNS sand shows that the excess in Portlandite weakening the ITZ of natural aggregate is absent in FNS sand ITZ. As a result, the resistance against chemically aggressive ions diffusion, water absorption, sorptivity, bulk and surface resistivity, and volume of permeable voids are significantly improved compared with the reference concretes due to the pozzolanic effect of FNS strengthening the ITZ. The substitution of 50% natural sand by FNS sand allows offsetting the detrimental effect of using fly ash on the concrete resistance against carbonation. All results show that using FNS sand in concrete can improve the concrete performance.	en_US
dc.relation.ispartof	Journal of Materials in Civil Engineering	en_US
dc.relation.isbasedon	10.1061/(ASCE)MT.1943-5533.0002797	en_US
dc.subject.classification	Building & Construction	en_US
dc.title	Durability and Microstructure Properties of Low-Carbon Concrete Incorporating Ferronickel Slag Sand and Fly Ash	en_US
dc.type	Journal Article
utslib.citation.volume	8	en_US
utslib.citation.volume	31	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0905 Civil Engineering	en_US
pubs.embargo.period	Not known	en_US
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.issue	8	en_US
pubs.publication-status	Published	en_US
pubs.volume	31	en_US

Abstract:

© 2019 American Society of Civil Engineers. Ferronickel slag (FNS) which is also known as electric arc furnace slag is a byproduct of the production of ferronickel alloy. The production of FNS at Société Le Nickel (SLN) in New Caledonia is about 2 Mt per year with an existing stockpile of 25 Mt, which presents an excellent potential for concrete applications in the Pacific region. The possibility of using FNS from SLN as fine aggregate replacement in concrete is investigated. The low-carbon-concrete mix design includes 50% natural sand replacement by FNS sand and 25% ordinary portland cement substitution by fly ash. Microstructural analysis by scanning electron microscopy - energy dispersive X-ray spectrometer (SEM-EDS) of the interface transition zone (ITZ) of FNS sand shows that the excess in Portlandite weakening the ITZ of natural aggregate is absent in FNS sand ITZ. As a result, the resistance against chemically aggressive ions diffusion, water absorption, sorptivity, bulk and surface resistivity, and volume of permeable voids are significantly improved compared with the reference concretes due to the pozzolanic effect of FNS strengthening the ITZ. The substitution of 50% natural sand by FNS sand allows offsetting the detrimental effect of using fly ash on the concrete resistance against carbonation. All results show that using FNS sand in concrete can improve the concrete performance.

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http://hdl.handle.net/10453/138445