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A Practical Carbonation Model for Service Life Design of Reinforced Concrete Structures
The increase in atmospheric carbon dioxide concentration due to global warming has a direct impact on the amount of carbonating concrete structures. For the past years, numerous studies have been done in South Africa on the subject and models developed to predict carbonation in concrete structures....
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| Format: | Thesis |
| Language: | English |
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Department of Civil Engineering
2022
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| _version_ | 1867614385473585152 |
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| access_status_str | Open Access |
| author | Harold, Romuald Fotso Lele |
| author2 | Beushausen, Hans-Dieter |
| author_browse | Beushausen, Hans-Dieter Harold, Romuald Fotso Lele |
| author_facet | Beushausen, Hans-Dieter Harold, Romuald Fotso Lele |
| author_sort | Harold, Romuald Fotso Lele |
| collection | Thesis |
| description | The increase in atmospheric carbon dioxide concentration due to global warming has a direct impact on the amount of carbonating concrete structures. For the past years, numerous studies have been done in South Africa on the subject and models developed to predict carbonation in concrete structures. Despite the large amount of resources and research effort put into developing these models, the translation from theory to practice represents a great challenge for design engineers in the field of durability design. This study presents a design tool based on existing models for use in practical applications. The proposed design tool assists in computing the service life of carbonating concrete structures and provides reliability values associated with the service life. It accounts for different binder compositions and binder types, as well as different locations and environmental land uses in South Africa. The validation of the design tool was done by comparing the service life prediction results to existing models, which generally showed good agreement. The developed design tool can be applied for predicting the long-term performance of new RC structures as well as improving the basis for quality assessment of existing, newly built RC structures. For the design of new structures, the designer is required to make certain assumptions concerning the information to be used for the simulation. These include values for the binder type, binder content, OPI, cover depth, land use and exposure parameters. For the quality control of new structures, the way in which the model parameters are obtained differs from that of new structures. As the structure already exists, both the concrete quality, cover depth and environmental loading can be measured directly on the structure with appropriate testing procedures. The outcome of applying the design tool for the analysis of concrete produced for the Gauteng Freeway Improvement project (GFIP) is also presented, with a case study of precast and in-situ structures chosen for the analysis. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/36850 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:51:12.377Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Department of Civil Engineering |
| publisherStr | Department of Civil Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/36850 A Practical Carbonation Model for Service Life Design of Reinforced Concrete Structures Harold, Romuald Fotso Lele Beushausen, Hans-Dieter Alexander, Mark Civil Engineering The increase in atmospheric carbon dioxide concentration due to global warming has a direct impact on the amount of carbonating concrete structures. For the past years, numerous studies have been done in South Africa on the subject and models developed to predict carbonation in concrete structures. Despite the large amount of resources and research effort put into developing these models, the translation from theory to practice represents a great challenge for design engineers in the field of durability design. This study presents a design tool based on existing models for use in practical applications. The proposed design tool assists in computing the service life of carbonating concrete structures and provides reliability values associated with the service life. It accounts for different binder compositions and binder types, as well as different locations and environmental land uses in South Africa. The validation of the design tool was done by comparing the service life prediction results to existing models, which generally showed good agreement. The developed design tool can be applied for predicting the long-term performance of new RC structures as well as improving the basis for quality assessment of existing, newly built RC structures. For the design of new structures, the designer is required to make certain assumptions concerning the information to be used for the simulation. These include values for the binder type, binder content, OPI, cover depth, land use and exposure parameters. For the quality control of new structures, the way in which the model parameters are obtained differs from that of new structures. As the structure already exists, both the concrete quality, cover depth and environmental loading can be measured directly on the structure with appropriate testing procedures. The outcome of applying the design tool for the analysis of concrete produced for the Gauteng Freeway Improvement project (GFIP) is also presented, with a case study of precast and in-situ structures chosen for the analysis. 2022-10-21T11:24:30Z 2022-10-21T11:24:30Z 2021 2022-10-21T07:02:46Z Master Thesis Masters MSc http://hdl.handle.net/11427/36850 eng application/pdf Department of Civil Engineering Faculty of Engineering and the Built Environment |
| spellingShingle | Civil Engineering Harold, Romuald Fotso Lele A Practical Carbonation Model for Service Life Design of Reinforced Concrete Structures |
| thesis_degree_str | Master's |
| title | A Practical Carbonation Model for Service Life Design of Reinforced Concrete Structures |
| title_full | A Practical Carbonation Model for Service Life Design of Reinforced Concrete Structures |
| title_fullStr | A Practical Carbonation Model for Service Life Design of Reinforced Concrete Structures |
| title_full_unstemmed | A Practical Carbonation Model for Service Life Design of Reinforced Concrete Structures |
| title_short | A Practical Carbonation Model for Service Life Design of Reinforced Concrete Structures |
| title_sort | practical carbonation model for service life design of reinforced concrete structures |
| topic | Civil Engineering |
| url | http://hdl.handle.net/11427/36850 |
| work_keys_str_mv | AT haroldromualdfotsolele apracticalcarbonationmodelforservicelifedesignofreinforcedconcretestructures AT haroldromualdfotsolele practicalcarbonationmodelforservicelifedesignofreinforcedconcretestructures |