EXPERIMENTAL STUDIES OF ACCELERATED CHLORIDE TRANSPORT IN CONCRETE
This contribution deals with the efficiency of electromigration of chlorides used as a repair method for reinforced concrete structures. Experimental studies of accelerated chloride transport tests were performed on samples of concrete without chlorides and with admixed sodium chloride during concre...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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CTU Central Library
2019-07-01
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| Series: | Acta Polytechnica CTU Proceedings |
| Subjects: | |
| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/5674 |
| _version_ | 1811196208362815488 |
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| author | Vojtěch Zacharda Jiří Němeček |
| author_facet | Vojtěch Zacharda Jiří Němeček |
| author_sort | Vojtěch Zacharda |
| collection | DOAJ |
| description | This contribution deals with the efficiency of electromigration of chlorides used as a repair method for reinforced concrete structures. Experimental studies of accelerated chloride transport tests were performed on samples of concrete without chlorides and with admixed sodium chloride during concreting. Two concrete types from Portland cement characterized with normal and low compressive strengths were studied. The electromigration was applied to penetrate chlorides into the chloride-free sample and for extraction of chlorides from the sample. The effectiveness of the chloride extraction process for rehabilitation of reinforced concrete in terms of lowering the chloride concentration in different concrete types and surface concentration was observed. Electrical extraction was found to be effective for lowering of initial chloride concentration by 15-20% after 24 hours. The decrease in surface concentrations was found in the range of 40-50%. The extraction process was found to be feasible and effective for both concrete types. |
| first_indexed | 2024-04-12T00:54:50Z |
| format | Article |
| id | doaj.art-9e2eb6f027fb484492c5727e6243905f |
| institution | Directory Open Access Journal |
| issn | 2336-5382 |
| language | English |
| last_indexed | 2024-04-12T00:54:50Z |
| publishDate | 2019-07-01 |
| publisher | CTU Central Library |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj.art-9e2eb6f027fb484492c5727e6243905f2022-12-22T03:54:38ZengCTU Central LibraryActa Polytechnica CTU Proceedings2336-53822019-07-0122013914410.14311/APP.2019.22.01394582EXPERIMENTAL STUDIES OF ACCELERATED CHLORIDE TRANSPORT IN CONCRETEVojtěch ZachardaJiří NěmečekThis contribution deals with the efficiency of electromigration of chlorides used as a repair method for reinforced concrete structures. Experimental studies of accelerated chloride transport tests were performed on samples of concrete without chlorides and with admixed sodium chloride during concreting. Two concrete types from Portland cement characterized with normal and low compressive strengths were studied. The electromigration was applied to penetrate chlorides into the chloride-free sample and for extraction of chlorides from the sample. The effectiveness of the chloride extraction process for rehabilitation of reinforced concrete in terms of lowering the chloride concentration in different concrete types and surface concentration was observed. Electrical extraction was found to be effective for lowering of initial chloride concentration by 15-20% after 24 hours. The decrease in surface concentrations was found in the range of 40-50%. The extraction process was found to be feasible and effective for both concrete types.https://ojs.cvut.cz/ojs/index.php/APP/article/view/5674concrete, electromigration, chlorides, extraction |
| spellingShingle | Vojtěch Zacharda Jiří Němeček EXPERIMENTAL STUDIES OF ACCELERATED CHLORIDE TRANSPORT IN CONCRETE Acta Polytechnica CTU Proceedings concrete, electromigration, chlorides, extraction |
| title | EXPERIMENTAL STUDIES OF ACCELERATED CHLORIDE TRANSPORT IN CONCRETE |
| title_full | EXPERIMENTAL STUDIES OF ACCELERATED CHLORIDE TRANSPORT IN CONCRETE |
| title_fullStr | EXPERIMENTAL STUDIES OF ACCELERATED CHLORIDE TRANSPORT IN CONCRETE |
| title_full_unstemmed | EXPERIMENTAL STUDIES OF ACCELERATED CHLORIDE TRANSPORT IN CONCRETE |
| title_short | EXPERIMENTAL STUDIES OF ACCELERATED CHLORIDE TRANSPORT IN CONCRETE |
| title_sort | experimental studies of accelerated chloride transport in concrete |
| topic | concrete, electromigration, chlorides, extraction |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/5674 |
| work_keys_str_mv | AT vojtechzacharda experimentalstudiesofacceleratedchloridetransportinconcrete AT jirinemecek experimentalstudiesofacceleratedchloridetransportinconcrete |