Influence of Pore Structure on Chloride Penetration in Cement Pastes Subject to Wetting-Drying Cycles
Copious studies have discovered a phenomenon that a chloride concentration peak appears on the surface of concrete under cyclic drying-wetting environments. In such cases, the chloride diffusion coefficient (D) obtained through directly fitting the standard error function of Fick’s second law is no...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/3909348 |
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| author | Honglei Chang Zhiwu Zuo Mingyue Qu Fei Wang Zhi Ge Jian Liu |
| author_facet | Honglei Chang Zhiwu Zuo Mingyue Qu Fei Wang Zhi Ge Jian Liu |
| author_sort | Honglei Chang |
| collection | DOAJ |
| description | Copious studies have discovered a phenomenon that a chloride concentration peak appears on the surface of concrete under cyclic drying-wetting environments. In such cases, the chloride diffusion coefficient (D) obtained through directly fitting the standard error function of Fick’s second law is no longer accurate. The more reliable D obtained by the method proposed by Andrade is employed in this research to investigate the influence of pore structure on chloride penetration rate of pastes. The results show that both the effective coefficient (Deff) and the apparent coefficient (Dapp) increase with total porosity, the most probable pore size, and water absorption porosity, suggesting that the increase of the three pore structure parameters accelerates chloride penetration rate under cyclic wetting-drying condition. The increase of the three parameters makes more room available and eases the difficulty for salt solution to enter the matrix and thus leads to the augmentation of chloride transporting in matrix. |
| format | Article |
| id | doaj-art-a9fc1fdc8faf460d9167efff711e84b9 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-a9fc1fdc8faf460d9167efff711e84b92025-02-03T01:33:29ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422019-01-01201910.1155/2019/39093483909348Influence of Pore Structure on Chloride Penetration in Cement Pastes Subject to Wetting-Drying CyclesHonglei Chang0Zhiwu Zuo1Mingyue Qu2Fei Wang3Zhi Ge4Jian Liu5School of Qilu Transportation, Jinan 250002, ChinaQilu Transportation Development Group Co. Ltd., Jinan 250101, ChinaSchool of Civil Engineering, Jinan 250061, ChinaQilu Transportation Development Group Co. Ltd., Jinan 250101, ChinaSchool of Qilu Transportation, Jinan 250002, ChinaSchool of Qilu Transportation, Jinan 250002, ChinaCopious studies have discovered a phenomenon that a chloride concentration peak appears on the surface of concrete under cyclic drying-wetting environments. In such cases, the chloride diffusion coefficient (D) obtained through directly fitting the standard error function of Fick’s second law is no longer accurate. The more reliable D obtained by the method proposed by Andrade is employed in this research to investigate the influence of pore structure on chloride penetration rate of pastes. The results show that both the effective coefficient (Deff) and the apparent coefficient (Dapp) increase with total porosity, the most probable pore size, and water absorption porosity, suggesting that the increase of the three pore structure parameters accelerates chloride penetration rate under cyclic wetting-drying condition. The increase of the three parameters makes more room available and eases the difficulty for salt solution to enter the matrix and thus leads to the augmentation of chloride transporting in matrix.http://dx.doi.org/10.1155/2019/3909348 |
| spellingShingle | Honglei Chang Zhiwu Zuo Mingyue Qu Fei Wang Zhi Ge Jian Liu Influence of Pore Structure on Chloride Penetration in Cement Pastes Subject to Wetting-Drying Cycles Advances in Materials Science and Engineering |
| title | Influence of Pore Structure on Chloride Penetration in Cement Pastes Subject to Wetting-Drying Cycles |
| title_full | Influence of Pore Structure on Chloride Penetration in Cement Pastes Subject to Wetting-Drying Cycles |
| title_fullStr | Influence of Pore Structure on Chloride Penetration in Cement Pastes Subject to Wetting-Drying Cycles |
| title_full_unstemmed | Influence of Pore Structure on Chloride Penetration in Cement Pastes Subject to Wetting-Drying Cycles |
| title_short | Influence of Pore Structure on Chloride Penetration in Cement Pastes Subject to Wetting-Drying Cycles |
| title_sort | influence of pore structure on chloride penetration in cement pastes subject to wetting drying cycles |
| url | http://dx.doi.org/10.1155/2019/3909348 |
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