Durability Assessment of Alkali-Activated Concrete Exposed to a Marine Environment

Law, D; Patrisia, Y; Gunasekara, C; Castel, A; Nguyen, QD; Wardhono, A

Durability Assessment of Alkali-Activated Concrete Exposed to a Marine Environment

Law, D Patrisia, Y Gunasekara, C Castel, A

Nguyen, QD Wardhono, A

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Publisher:: ASCE-AMER SOC CIVIL ENGINEERS
Publication Type:: Journal Article
Citation:: Journal of Materials in Civil Engineering, 2023, 35, (9)
Issue Date:: 2023-01-01

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Field	Value	Language
dc.contributor.author	Law, D
dc.contributor.author	Patrisia, Y
dc.contributor.author	Gunasekara, C
dc.contributor.author	Castel, A https://orcid.org/0000-0003-1619-9643
dc.contributor.author	Nguyen, QD
dc.contributor.author	Wardhono, A
dc.date.accessioned	2024-04-11T07:10:30Z
dc.date.available	2024-04-11T07:10:30Z
dc.date.issued	2023-01-01
dc.identifier.citation	Journal of Materials in Civil Engineering, 2023, 35, (9)
dc.identifier.issn	0899-1561
dc.identifier.issn	1943-5533
dc.identifier.uri	http://hdl.handle.net/10453/177759
dc.description.abstract	This study investigated the performance of two alkali-activated concretes (AACs) subjected to marine exposure for 2 years. The AACs were synthesized from a low-calcium Class F fly ash (FA) and a blast-furnace slag. Concrete specimens were exposed in a marine environment in a port facility in southern Australia for 2 years. The specimens were subject to a range of nondestructive testing (NDT) techniques, including resistivity, Schmidt hammer, and ultrasonic pulse velocity (UPV) tests. In addition, chloride diffusion coefficients were calculated from concrete cores taken from specimens exposed in the marine environment. Microscopy analysis was undertaken using Fourier-transform infrared (FT-IR), nuclear magnetic resonance (NMR), and thermogravimetric analysis (TGA), and comparative data were taken on laboratory specimens at 28 days. Furthermore, the chloride diffusion coefficients were compared with the results of standard laboratory tests undertaken on the control samples at 28 days, including rapid chloride permeability testing (RCPT) using a 10-V driving voltage, an NT Build 492 test, and a bulk diffusion test, to determine the relationship between the 28-day laboratory tests results and the site performance. The data showed good correlation between the predicted performance based on the 28 day laboratory tests and the 2-year site data. The chloride diffusion of the ground granulated blast-furnace slag (GGBS) concrete agreed very accurately with the predicted value from the modified RCPT test, whereas the performance of FA concrete was superior to that predicted.
dc.language	English
dc.publisher	ASCE-AMER SOC CIVIL ENGINEERS
dc.relation.ispartof	Journal of Materials in Civil Engineering
dc.relation.isbasedon	10.1061/JMCEE7.MTENG-14346
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0912 Materials Engineering
dc.subject.classification	Building & Construction
dc.subject.classification	4005 Civil engineering
dc.subject.classification	4016 Materials engineering
dc.title	Durability Assessment of Alkali-Activated Concrete Exposed to a Marine Environment
dc.type	Journal Article
utslib.citation.volume	35
utslib.for	0905 Civil Engineering
utslib.for	0912 Materials 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	2024-04-11T07:10:28Z
pubs.issue	9
pubs.publication-status	Published
pubs.volume	35
utslib.citation.issue	9

Abstract:

This study investigated the performance of two alkali-activated concretes (AACs) subjected to marine exposure for 2 years. The AACs were synthesized from a low-calcium Class F fly ash (FA) and a blast-furnace slag. Concrete specimens were exposed in a marine environment in a port facility in southern Australia for 2 years. The specimens were subject to a range of nondestructive testing (NDT) techniques, including resistivity, Schmidt hammer, and ultrasonic pulse velocity (UPV) tests. In addition, chloride diffusion coefficients were calculated from concrete cores taken from specimens exposed in the marine environment. Microscopy analysis was undertaken using Fourier-transform infrared (FT-IR), nuclear magnetic resonance (NMR), and thermogravimetric analysis (TGA), and comparative data were taken on laboratory specimens at 28 days. Furthermore, the chloride diffusion coefficients were compared with the results of standard laboratory tests undertaken on the control samples at 28 days, including rapid chloride permeability testing (RCPT) using a 10-V driving voltage, an NT Build 492 test, and a bulk diffusion test, to determine the relationship between the 28-day laboratory tests results and the site performance. The data showed good correlation between the predicted performance based on the 28 day laboratory tests and the 2-year site data. The chloride diffusion of the ground granulated blast-furnace slag (GGBS) concrete agreed very accurately with the predicted value from the modified RCPT test, whereas the performance of FA concrete was superior to that predicted.

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http://hdl.handle.net/10453/177759