Investigation on the mathematical models of chloride diffusion coefficient in concrete exposed to marine environment

Nabavi, F; Nejadi, S; Samali, B

Investigation on the mathematical models of chloride diffusion coefficient in concrete exposed to marine environment

Nabavi, F Nejadi, S Samali, B

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Publication Type:: Conference Proceeding
Citation:: From Materials to Structures: Advancement Through Innovation - Proceedings of the 22nd Australasian Conference on the Mechanics of Structures and Materials, ACMSM 2012, 2013, pp. 1153 - 1158
Issue Date:: 2013-08-12

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Field	Value	Language
dc.contributor.author	Nabavi, F	en_US
dc.contributor.author	Nejadi, S	en_US
dc.contributor.author	Samali, B https://orcid.org/0000-0002-3426-7745	en_US
dc.date.issued	2013-08-12	en_US
dc.identifier.citation	From Materials to Structures: Advancement Through Innovation - Proceedings of the 22nd Australasian Conference on the Mechanics of Structures and Materials, ACMSM 2012, 2013, pp. 1153 - 1158	en_US
dc.identifier.isbn	9780415633185	en_US
dc.identifier.uri	http://hdl.handle.net/10453/23524
dc.description.abstract	Degradation of reinforced concrete (RC) in maritime structures has become aworldwide problem due to its excessive costs of maintenance, repair, and replacement in addition to its environmental impacts and safety issues. Degradation of both concrete and steel which is the main reason of reduction in the service life of RC structures strongly depends on the diffusion process of moisture and aggressive species. In this paper, the major and popular mathematical models of diffusion process in concrete are surveyed and investigated. Predominantly in these models, the coefficient of chloride diffusion into the concrete is assumed to be constant. Whereas, experimental records indicate that diffusion coefficient is a function of time. Subsequently, data analysis and comparisons between the existing analytical models for predicting the diffusion coefficient with the existing experimental database are carried out in this study. Clearly, these comparisons reveal that there are gaps between the existing mathematical models and previously recorded experimental results. Perhaps, these gaps may be interpreted as influence of the other affecting parameters on the diffusion coefficient such as temperature, aggregate size and relative humidity in addition to the water cement ratio. Accordingly, the existing mathematical models are not adequate enough to predict the diffusion coefficient precisely and further studies need to be performed. At the present, an extensive experimental and analytical research in this regard is being conducted in the CBIR group, University of Technology Sydney. © 2013 Taylor & Francis Group.	en_US
dc.relation.ispartof	From Materials to Structures: Advancement Through Innovation - Proceedings of the 22nd Australasian Conference on the Mechanics of Structures and Materials, ACMSM 2012	en_US
dc.title	Investigation on the mathematical models of chloride diffusion coefficient in concrete exposed to marine environment	en_US
dc.type	Conference Proceeding
utslib.for	0905 Civil Engineering	en_US
dc.location.activity	SYDNEY, AUSTRALIA	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
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US

Abstract:

Degradation of reinforced concrete (RC) in maritime structures has become aworldwide problem due to its excessive costs of maintenance, repair, and replacement in addition to its environmental impacts and safety issues. Degradation of both concrete and steel which is the main reason of reduction in the service life of RC structures strongly depends on the diffusion process of moisture and aggressive species. In this paper, the major and popular mathematical models of diffusion process in concrete are surveyed and investigated. Predominantly in these models, the coefficient of chloride diffusion into the concrete is assumed to be constant. Whereas, experimental records indicate that diffusion coefficient is a function of time. Subsequently, data analysis and comparisons between the existing analytical models for predicting the diffusion coefficient with the existing experimental database are carried out in this study. Clearly, these comparisons reveal that there are gaps between the existing mathematical models and previously recorded experimental results. Perhaps, these gaps may be interpreted as influence of the other affecting parameters on the diffusion coefficient such as temperature, aggregate size and relative humidity in addition to the water cement ratio. Accordingly, the existing mathematical models are not adequate enough to predict the diffusion coefficient precisely and further studies need to be performed. At the present, an extensive experimental and analytical research in this regard is being conducted in the CBIR group, University of Technology Sydney. © 2013 Taylor & Francis Group.

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http://hdl.handle.net/10453/23524