Pore Filling Effect of Forced Carbonation Reactions Using Carbon Dioxide Nanobubbles
Various methods for repairing and modifying concrete surfaces have been proposed and applied to improve the durability of existing concrete structures. Surface modification through forced carbonation is a method of densification that forms calcium carbonate in the pores on the surface of concrete to...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/19/4343 |
| _version_ | 1797552191857229824 |
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| author | Jihoon Kim Ryoma Kitagaki Heesup Choi |
| author_facet | Jihoon Kim Ryoma Kitagaki Heesup Choi |
| author_sort | Jihoon Kim |
| collection | DOAJ |
| description | Various methods for repairing and modifying concrete surfaces have been proposed and applied to improve the durability of existing concrete structures. Surface modification through forced carbonation is a method of densification that forms calcium carbonate in the pores on the surface of concrete to improve its durability. In this study, to evaluate the applicability of this surface modification method to existing buildings, a series of experiments was conducted in which mortar specimens were repeatedly immersed in a carbon dioxide nanobubble aqueous solution. By evaluating the weight change and absorption rate, it was determined that the higher the water/cement ratio of the mortar specimen, the higher the pore filling effect owing to immersion in the carbon dioxide nanobubble aqueous solution. In addition, the effect of clogged pores generated by the precipitation of calcium carbonate was confirmed, and it was found that the higher the water/cement ratio of the mortar specimen, the higher the pore filling effect due to clogging. We believe that our findings contribute to the development of research and construction practices associated with concrete repair and restoration. |
| first_indexed | 2024-03-10T15:56:30Z |
| format | Article |
| id | doaj.art-087cacf80d8c4d52ae8dc95499551879 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T15:56:30Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-087cacf80d8c4d52ae8dc954995518792023-11-20T15:34:14ZengMDPI AGMaterials1996-19442020-09-011319434310.3390/ma13194343Pore Filling Effect of Forced Carbonation Reactions Using Carbon Dioxide NanobubblesJihoon Kim0Ryoma Kitagaki1Heesup Choi2Department of Civil Engineering and Architecture, Muroran Institute of Technology, Hokkaido 0508585, JapanDivision of Human Environmental System, Hokkaido University, Hokkaido 0600808, JapanDepartment of Civil and Environmental Engineering, Kitami Institute of Technology, Hokkaido 0908507, JapanVarious methods for repairing and modifying concrete surfaces have been proposed and applied to improve the durability of existing concrete structures. Surface modification through forced carbonation is a method of densification that forms calcium carbonate in the pores on the surface of concrete to improve its durability. In this study, to evaluate the applicability of this surface modification method to existing buildings, a series of experiments was conducted in which mortar specimens were repeatedly immersed in a carbon dioxide nanobubble aqueous solution. By evaluating the weight change and absorption rate, it was determined that the higher the water/cement ratio of the mortar specimen, the higher the pore filling effect owing to immersion in the carbon dioxide nanobubble aqueous solution. In addition, the effect of clogged pores generated by the precipitation of calcium carbonate was confirmed, and it was found that the higher the water/cement ratio of the mortar specimen, the higher the pore filling effect due to clogging. We believe that our findings contribute to the development of research and construction practices associated with concrete repair and restoration.https://www.mdpi.com/1996-1944/13/19/4343cementitious materialsnanosized ultrafine CO<sub>2</sub> bubbleCaCO<sub>3</sub>forced carbonationsurface modification |
| spellingShingle | Jihoon Kim Ryoma Kitagaki Heesup Choi Pore Filling Effect of Forced Carbonation Reactions Using Carbon Dioxide Nanobubbles Materials cementitious materials nanosized ultrafine CO<sub>2</sub> bubble CaCO<sub>3</sub> forced carbonation surface modification |
| title | Pore Filling Effect of Forced Carbonation Reactions Using Carbon Dioxide Nanobubbles |
| title_full | Pore Filling Effect of Forced Carbonation Reactions Using Carbon Dioxide Nanobubbles |
| title_fullStr | Pore Filling Effect of Forced Carbonation Reactions Using Carbon Dioxide Nanobubbles |
| title_full_unstemmed | Pore Filling Effect of Forced Carbonation Reactions Using Carbon Dioxide Nanobubbles |
| title_short | Pore Filling Effect of Forced Carbonation Reactions Using Carbon Dioxide Nanobubbles |
| title_sort | pore filling effect of forced carbonation reactions using carbon dioxide nanobubbles |
| topic | cementitious materials nanosized ultrafine CO<sub>2</sub> bubble CaCO<sub>3</sub> forced carbonation surface modification |
| url | https://www.mdpi.com/1996-1944/13/19/4343 |
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