The influence of concrete mix composition and environmental exposure on long-term chloride ingress in concrete

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dc.contributor.advisorAlexander, Mark
dc.contributor.authorHeiyantuduwa-Beushausen, Rukshani Heiyantuduwa
dc.date.accessioned2023-03-02T12:12:50Z
dc.date.available2023-03-02T12:12:50Z
dc.date.issued2022
dc.date.updated2023-02-20T12:55:32Z
dc.description.abstractThe parameters influencing long-term chloride ingress in concrete structures exposed to different environmental conditions in South Africa were investigated, aiming at improving service life prediction models for reinforced concrete structures situated in marine exposure classes. Time-dependent chloride ingress was measured over a period of roughly 4 years with respect to the influences of binder type, w/b ratio and environmental conditions, exposing samples to submerged, tidal, splash/spray and airborne chloride exposure in the Atlantic Ocean in Cape Town and the Indian Ocean in Durban. As a comparison, chloride ingress was measured under laboratory-controlled conditions. The data was analysed to identify the parameters used in the modelling of long-term chloride ingress into concrete using Fick's laws of diffusion. The time dependency of apparent diffusion coefficients and chloride surface concentrations was identified and used in the long-term service life prediction with respect to the various experimental parameters. Based on the model predictions, the combined influences of binder type, w/b ratio, exposure condition and cover depth on the expected service life duration of RC structures in South African marine environments were investigated quantitively.
dc.identifier.apacitationHeiyantuduwa-Beushausen, R. H. (2022). <i>The influence of concrete mix composition and environmental exposure on long-term chloride ingress in concrete</i>. (). ,Faculty of Engineering and the Built Environment ,Department of Civil Engineering. Retrieved from http://hdl.handle.net/11427/37161en_ZA
dc.identifier.chicagocitationHeiyantuduwa-Beushausen, Rukshani Heiyantuduwa. <i>"The influence of concrete mix composition and environmental exposure on long-term chloride ingress in concrete."</i> ., ,Faculty of Engineering and the Built Environment ,Department of Civil Engineering, 2022. http://hdl.handle.net/11427/37161en_ZA
dc.identifier.citationHeiyantuduwa-Beushausen, R.H. 2022. The influence of concrete mix composition and environmental exposure on long-term chloride ingress in concrete. . ,Faculty of Engineering and the Built Environment ,Department of Civil Engineering. http://hdl.handle.net/11427/37161en_ZA
dc.identifier.ris TY - Doctoral Thesis AU - Heiyantuduwa-Beushausen, Rukshani Heiyantuduwa AB - The parameters influencing long-term chloride ingress in concrete structures exposed to different environmental conditions in South Africa were investigated, aiming at improving service life prediction models for reinforced concrete structures situated in marine exposure classes. Time-dependent chloride ingress was measured over a period of roughly 4 years with respect to the influences of binder type, w/b ratio and environmental conditions, exposing samples to submerged, tidal, splash/spray and airborne chloride exposure in the Atlantic Ocean in Cape Town and the Indian Ocean in Durban. As a comparison, chloride ingress was measured under laboratory-controlled conditions. The data was analysed to identify the parameters used in the modelling of long-term chloride ingress into concrete using Fick's laws of diffusion. The time dependency of apparent diffusion coefficients and chloride surface concentrations was identified and used in the long-term service life prediction with respect to the various experimental parameters. Based on the model predictions, the combined influences of binder type, w/b ratio, exposure condition and cover depth on the expected service life duration of RC structures in South African marine environments were investigated quantitively. DA - 2022_ DB - OpenUCT DP - University of Cape Town KW - Civil Engineering LK - https://open.uct.ac.za PY - 2022 T1 - The influence of concrete mix composition and environmental exposure on long-term chloride ingress in concrete TI - The influence of concrete mix composition and environmental exposure on long-term chloride ingress in concrete UR - http://hdl.handle.net/11427/37161 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/37161
dc.identifier.vancouvercitationHeiyantuduwa-Beushausen RH. The influence of concrete mix composition and environmental exposure on long-term chloride ingress in concrete. []. ,Faculty of Engineering and the Built Environment ,Department of Civil Engineering, 2022 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/37161en_ZA
dc.language.rfc3066eng
dc.publisher.departmentDepartment of Civil Engineering
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.subjectCivil Engineering
dc.titleThe influence of concrete mix composition and environmental exposure on long-term chloride ingress in concrete
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationlevelPhD
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