Modelling non-isothermal chloride ingress in unsaturated cement-based materials

Yu, Y; Chen, X; Gao, W; Wu, D; Castel, A

Modelling non-isothermal chloride ingress in unsaturated cement-based materials

Yu, Y Chen, X Gao, W Wu, D

Castel, A

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Publication Type:: Journal Article
Citation:: Construction and Building Materials, 2019, 217 pp. 441 - 455
Issue Date:: 2019-08-30

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Field	Value	Language
dc.contributor.author	Yu, Y	en_US
dc.contributor.author	Chen, X	en_US
dc.contributor.author	Gao, W	en_US
dc.contributor.author	Wu, D https://orcid.org/0000-0002-7284-5024	en_US
dc.contributor.author	Castel, A	en_US
dc.date.issued	2019-08-30	en_US
dc.identifier.citation	Construction and Building Materials, 2019, 217 pp. 441 - 455	en_US
dc.identifier.issn	0950-0618	en_US
dc.identifier.uri	http://hdl.handle.net/10453/135845
dc.description.abstract	© 2019 Elsevier Ltd The realistic environments for engineering practices are diverse, where the temperature, relative humidity, and surface ionic concentrations often experience seasonal variations. The accurate evaluation of the multi-species transportation is crucial in terms of durability assessment of cement-based materials. In this work, an improved moisture transportation model is developed, which takes the influences of the changes in relative humidity, temperature and microstructure into account. The moisture transportation model is coupled with the Poisson-Nernst-Planck model to study the chloride ingress problems. To model the chloride binding effect, both the pre-designed chloride binding isotherm and the thermodynamic modelling method are implemented. In the thermodynamic method, the physical and chemical binding of chloride are modelled in details, and coupled with other simultaneous reactions so as to model the variations of the microstructure. The proposed method is validated against a variety of reported experiments and a long-term field study. The Numerical modelling demonstrates the effectiveness of the improved moisture transportation model and the significance of using the thermodynamic modelling method for long-term durability assessments.	en_US
dc.relation.ispartof	Construction and Building Materials	en_US
dc.relation.isbasedon	10.1016/j.conbuildmat.2019.05.078	en_US
dc.subject.classification	Building & Construction	en_US
dc.title	Modelling non-isothermal chloride ingress in unsaturated cement-based materials	en_US
dc.type	Journal Article
utslib.citation.volume	217	en_US
utslib.for	0905 Civil Engineering	en_US
utslib.for	1202 Building	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.publication-status	Published	en_US
pubs.volume	217	en_US

Abstract:

© 2019 Elsevier Ltd The realistic environments for engineering practices are diverse, where the temperature, relative humidity, and surface ionic concentrations often experience seasonal variations. The accurate evaluation of the multi-species transportation is crucial in terms of durability assessment of cement-based materials. In this work, an improved moisture transportation model is developed, which takes the influences of the changes in relative humidity, temperature and microstructure into account. The moisture transportation model is coupled with the Poisson-Nernst-Planck model to study the chloride ingress problems. To model the chloride binding effect, both the pre-designed chloride binding isotherm and the thermodynamic modelling method are implemented. In the thermodynamic method, the physical and chemical binding of chloride are modelled in details, and coupled with other simultaneous reactions so as to model the variations of the microstructure. The proposed method is validated against a variety of reported experiments and a long-term field study. The Numerical modelling demonstrates the effectiveness of the improved moisture transportation model and the significance of using the thermodynamic modelling method for long-term durability assessments.

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http://hdl.handle.net/10453/135845