Assessing alkali-activated concrete performance in chloride environments using NT Build 492

Noushini, A; Nguyen, QD; Castel, A

Assessing alkali-activated concrete performance in chloride environments using NT Build 492

Noushini, A Nguyen, QD Castel, A

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Publisher:: SPRINGER
Publication Type:: Journal Article
Citation:: Materials and Structures/Materiaux et Constructions, 2021, 54, (2)
Issue Date:: 2021-04-01

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Field	Value	Language
dc.contributor.author	Noushini, A
dc.contributor.author	Nguyen, QD
dc.contributor.author	Castel, A https://orcid.org/0000-0003-1619-9643
dc.date.accessioned	2022-03-17T22:03:36Z
dc.date.available	2022-03-17T22:03:36Z
dc.date.issued	2021-04-01
dc.identifier.citation	Materials and Structures/Materiaux et Constructions, 2021, 54, (2)
dc.identifier.issn	1359-5997
dc.identifier.issn	1871-6873
dc.identifier.uri	http://hdl.handle.net/10453/155303
dc.description.abstract	The production of Portland cement is responsible for approximately 5–7% of the worldwide CO2 emission. Geopolymer concrete (GPC) presents potential to become a more sustainable alternative to Portland cement and reduce the environment impact of the concrete industry. Marine environment is one of the most corrosion issues for reinforced concrete structures. Chloride migration test (Nordtest NT Build 492) and bulk diffusion chloride test (ASTM C1556) has been widely used to assess chloride diffusion resistance of Portland cement concrete. NT Build 492, involving externally applied electrical voltage, provides fast and adequate assessment of chloride penetration resistance of Portland cement concrete. However, the utilization of NT Build 492 for GPCs requires recalibration due to their different microstructure and pore solution composition compared to Portland cement concrete. This study aims to establish performance-based criteria for GPCs in marine environments using NT Build 492 and ASTM C1556 test protocols. Experimental results revealed a good correlation between chloride migration coefficients (NT Build 492) and chloride diffusion coefficients (ASTM C1556). In addition, chloride concentration at the colour change boundary used to calculate the chloride migration coefficients in NT Build 492 has been recalibrated for the chemistry of GPCs pore solution.
dc.language	English
dc.publisher	SPRINGER
dc.relation.ispartof	Materials and Structures/Materiaux et Constructions
dc.relation.isbasedon	10.1617/s11527-021-01652-7
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering
dc.subject.classification	Building & Construction
dc.title	Assessing alkali-activated concrete performance in chloride environments using NT Build 492
dc.type	Journal Article
utslib.citation.volume	54
utslib.for	0905 Civil Engineering
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	2022-03-17T22:03:34Z
pubs.issue	2
pubs.publication-status	Published
pubs.volume	54
utslib.citation.issue	2

Abstract:

The production of Portland cement is responsible for approximately 5–7% of the worldwide CO2 emission. Geopolymer concrete (GPC) presents potential to become a more sustainable alternative to Portland cement and reduce the environment impact of the concrete industry. Marine environment is one of the most corrosion issues for reinforced concrete structures. Chloride migration test (Nordtest NT Build 492) and bulk diffusion chloride test (ASTM C1556) has been widely used to assess chloride diffusion resistance of Portland cement concrete. NT Build 492, involving externally applied electrical voltage, provides fast and adequate assessment of chloride penetration resistance of Portland cement concrete. However, the utilization of NT Build 492 for GPCs requires recalibration due to their different microstructure and pore solution composition compared to Portland cement concrete. This study aims to establish performance-based criteria for GPCs in marine environments using NT Build 492 and ASTM C1556 test protocols. Experimental results revealed a good correlation between chloride migration coefficients (NT Build 492) and chloride diffusion coefficients (ASTM C1556). In addition, chloride concentration at the colour change boundary used to calculate the chloride migration coefficients in NT Build 492 has been recalibrated for the chemistry of GPCs pore solution.

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http://hdl.handle.net/10453/155303