Time Evolution of CO<sub>2</sub> Diffusivity of Carbonated Concrete
Carbonation of cementitious materials is one of main causes of reinforcement corrosion and CO<sub>2</sub> diffusivity influenced by microstructural characteristics of the cementitious materials is a decisive parameter for the carbonation rate. This study focused on establishing a multifa...
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| Format: | Article |
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MDPI AG
2020-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/24/8910 |
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| author | In-Seok Yoon Chun-Ho Chang |
| author_facet | In-Seok Yoon Chun-Ho Chang |
| author_sort | In-Seok Yoon |
| collection | DOAJ |
| description | Carbonation of cementitious materials is one of main causes of reinforcement corrosion and CO<sub>2</sub> diffusivity influenced by microstructural characteristics of the cementitious materials is a decisive parameter for the carbonation rate. This study focused on establishing a multifactor functional model to calculate the CO<sub>2</sub> diffusivity of carbonated cementitious materials. Because CO<sub>2</sub> gas flows through carbonated zone, it is necessary to estimate CO<sub>2</sub> diffusivity of carbonated concrete. Many factors on the CO<sub>2</sub> diffusivity, such as the diffusivity in vapor, tortuosity, microstructural characteristics of cement paste, contribution of aggregate, and reduction of porosity due to carbonation, were considered. Apparent and effective CO<sub>2</sub> diffusivity were calculated according to the absence or presence of moisture in the pore system of concrete, and the results were compared with previous research. |
| first_indexed | 2024-03-10T14:06:03Z |
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| id | doaj.art-9736ff46c07c4628b18bb90fb3c8ca10 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T14:06:03Z |
| publishDate | 2020-12-01 |
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| spelling | doaj.art-9736ff46c07c4628b18bb90fb3c8ca102023-11-21T00:41:42ZengMDPI AGApplied Sciences2076-34172020-12-011024891010.3390/app10248910Time Evolution of CO<sub>2</sub> Diffusivity of Carbonated ConcreteIn-Seok Yoon0Chun-Ho Chang1Construction Information Engineering, Induk University, Seoul 01878, KoreaCivil Engineering, Keimyung University, Daegu 42601, KoreaCarbonation of cementitious materials is one of main causes of reinforcement corrosion and CO<sub>2</sub> diffusivity influenced by microstructural characteristics of the cementitious materials is a decisive parameter for the carbonation rate. This study focused on establishing a multifactor functional model to calculate the CO<sub>2</sub> diffusivity of carbonated cementitious materials. Because CO<sub>2</sub> gas flows through carbonated zone, it is necessary to estimate CO<sub>2</sub> diffusivity of carbonated concrete. Many factors on the CO<sub>2</sub> diffusivity, such as the diffusivity in vapor, tortuosity, microstructural characteristics of cement paste, contribution of aggregate, and reduction of porosity due to carbonation, were considered. Apparent and effective CO<sub>2</sub> diffusivity were calculated according to the absence or presence of moisture in the pore system of concrete, and the results were compared with previous research.https://www.mdpi.com/2076-3417/10/24/8910CO<sub>2</sub> diffusivitycarbonationreinforcement corrosionmoisture |
| spellingShingle | In-Seok Yoon Chun-Ho Chang Time Evolution of CO<sub>2</sub> Diffusivity of Carbonated Concrete Applied Sciences CO<sub>2</sub> diffusivity carbonation reinforcement corrosion moisture |
| title | Time Evolution of CO<sub>2</sub> Diffusivity of Carbonated Concrete |
| title_full | Time Evolution of CO<sub>2</sub> Diffusivity of Carbonated Concrete |
| title_fullStr | Time Evolution of CO<sub>2</sub> Diffusivity of Carbonated Concrete |
| title_full_unstemmed | Time Evolution of CO<sub>2</sub> Diffusivity of Carbonated Concrete |
| title_short | Time Evolution of CO<sub>2</sub> Diffusivity of Carbonated Concrete |
| title_sort | time evolution of co sub 2 sub diffusivity of carbonated concrete |
| topic | CO<sub>2</sub> diffusivity carbonation reinforcement corrosion moisture |
| url | https://www.mdpi.com/2076-3417/10/24/8910 |
| work_keys_str_mv | AT inseokyoon timeevolutionofcosub2subdiffusivityofcarbonatedconcrete AT chunhochang timeevolutionofcosub2subdiffusivityofcarbonatedconcrete |