Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions
The transport mechanism of chloride ions in concrete is relatively complicated since the erosion process is influenced by many factors. To investigate the effect of exposure conditions on the chloride ion diffusion property, three exposure conditions (long-term immersion in static sodium chloride so...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-04-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/15/8/2917 |
| _version_ | 1797445164998852608 |
|---|---|
| author | Fulai Qu Jinkai Zhang Guirong Liu Shunbo Zhao |
| author_facet | Fulai Qu Jinkai Zhang Guirong Liu Shunbo Zhao |
| author_sort | Fulai Qu |
| collection | DOAJ |
| description | The transport mechanism of chloride ions in concrete is relatively complicated since the erosion process is influenced by many factors. To investigate the effect of exposure conditions on the chloride ion diffusion property, three exposure conditions (long-term immersion in static sodium chloride solution, long-term immersion in circulating sodium chloride solution and dry–wet cycles in circulating sodium chloride solution) were considered in chloride ion diffusion experiments. Experimental results indicated that the chloride ion content at a certain depth increased with erosion age. The chloride ions in static sodium chloride solution transported more rapidly than those under dry–wet cycle conditions. Moreover, the chloride ion content of concrete under dry–wet cycles of the circulating sodium chloride solution was slightly higher than that under long-term immersion in the circulating solution. Based on Fick’s second law, empirical equations for the chloride diffusion coefficient and chloride content at the surface of concrete were proposed by fitting experimental data, and the values of correlation coefficients of different exposure conditions were suggested. By comparison with the experiment results, it was verified that the calculation formula had better applicability. This method could be used to predict and analyze the chloride ion content under different exposure conditions. |
| first_indexed | 2024-03-09T13:22:48Z |
| format | Article |
| id | doaj.art-d7d322d607524b61a0cd96c3d73d63d6 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T13:22:48Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-d7d322d607524b61a0cd96c3d73d63d62023-11-30T21:28:35ZengMDPI AGMaterials1996-19442022-04-01158291710.3390/ma15082917Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure ConditionsFulai Qu0Jinkai Zhang1Guirong Liu2Shunbo Zhao3School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaSchool of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaSchool of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaSchool of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaThe transport mechanism of chloride ions in concrete is relatively complicated since the erosion process is influenced by many factors. To investigate the effect of exposure conditions on the chloride ion diffusion property, three exposure conditions (long-term immersion in static sodium chloride solution, long-term immersion in circulating sodium chloride solution and dry–wet cycles in circulating sodium chloride solution) were considered in chloride ion diffusion experiments. Experimental results indicated that the chloride ion content at a certain depth increased with erosion age. The chloride ions in static sodium chloride solution transported more rapidly than those under dry–wet cycle conditions. Moreover, the chloride ion content of concrete under dry–wet cycles of the circulating sodium chloride solution was slightly higher than that under long-term immersion in the circulating solution. Based on Fick’s second law, empirical equations for the chloride diffusion coefficient and chloride content at the surface of concrete were proposed by fitting experimental data, and the values of correlation coefficients of different exposure conditions were suggested. By comparison with the experiment results, it was verified that the calculation formula had better applicability. This method could be used to predict and analyze the chloride ion content under different exposure conditions.https://www.mdpi.com/1996-1944/15/8/2917erosion conditionchloride iondry–wet cyclecirculating sodium chloride solutiondiffusion property |
| spellingShingle | Fulai Qu Jinkai Zhang Guirong Liu Shunbo Zhao Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions Materials erosion condition chloride ion dry–wet cycle circulating sodium chloride solution diffusion property |
| title | Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions |
| title_full | Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions |
| title_fullStr | Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions |
| title_full_unstemmed | Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions |
| title_short | Experimental Study on Chloride Ion Diffusion in Concrete Affected by Exposure Conditions |
| title_sort | experimental study on chloride ion diffusion in concrete affected by exposure conditions |
| topic | erosion condition chloride ion dry–wet cycle circulating sodium chloride solution diffusion property |
| url | https://www.mdpi.com/1996-1944/15/8/2917 |
| work_keys_str_mv | AT fulaiqu experimentalstudyonchlorideiondiffusioninconcreteaffectedbyexposureconditions AT jinkaizhang experimentalstudyonchlorideiondiffusioninconcreteaffectedbyexposureconditions AT guirongliu experimentalstudyonchlorideiondiffusioninconcreteaffectedbyexposureconditions AT shunbozhao experimentalstudyonchlorideiondiffusioninconcreteaffectedbyexposureconditions |