Steel corrosion assessment by electrochemical impedance on metakaolin blended mortars
Since Corrosion of reinforcing steel in concrete is the cause of major economic losses, Portland cement has been traditionally replaced by cements blended with pozzalanic materials, most of which have been found to reduce the corrosion of steel. This paper shows the results of an experimental resear...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2013-11-01
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| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600035&tlng=en |
| _version_ | 1830380804756209664 |
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| author | Víctor Triana Juan Lizarazo-Marriaga Jhon Olaya Flórez |
| author_facet | Víctor Triana Juan Lizarazo-Marriaga Jhon Olaya Flórez |
| author_sort | Víctor Triana |
| collection | DOAJ |
| description | Since Corrosion of reinforcing steel in concrete is the cause of major economic losses, Portland cement has been traditionally replaced by cements blended with pozzalanic materials, most of which have been found to reduce the corrosion of steel. This paper shows the results of an experimental research aimed to investigate the corrosion of reinforcement in mortar using electrochemical impedance spectroscopy (EIS). For this, concrete laboratory samples containing a 0.0055 m steel bar and prepared with just ordinary Portland cement (OPC) and metakaolin at a replacement level of 20% were analyzed. In order to accelerate the steel corrosion process, all the samples were kept in a 3% NaCl solution and a constant anodic electrical potential was applied. Variations in the water to cementitious material ratio (0.5 and 0.6) and metakaolin proportion were analyzed, while the cementitious material to sand ratio was kept constant at 1:2.25 in all of the specimens. The results showed a reduction in corrosion rates when metakaolin was used as a blending admixture, especially at water to cementitious material ratio of 0.5. |
| first_indexed | 2024-12-20T09:37:37Z |
| format | Article |
| id | doaj.art-401a113fb940459fa6e5a50310c4fee6 |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-20T09:37:37Z |
| publishDate | 2013-11-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-401a113fb940459fa6e5a50310c4fee62022-12-21T19:44:57ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392013-11-011661457146410.1590/S1516-14392013005000178Steel corrosion assessment by electrochemical impedance on metakaolin blended mortarsVíctor Triana0Juan Lizarazo-Marriaga1Jhon Olaya Flórez2Universidad Nacional de ColombiaUniversidad Nacional de ColombiaUniversidad Nacional de ColombiaSince Corrosion of reinforcing steel in concrete is the cause of major economic losses, Portland cement has been traditionally replaced by cements blended with pozzalanic materials, most of which have been found to reduce the corrosion of steel. This paper shows the results of an experimental research aimed to investigate the corrosion of reinforcement in mortar using electrochemical impedance spectroscopy (EIS). For this, concrete laboratory samples containing a 0.0055 m steel bar and prepared with just ordinary Portland cement (OPC) and metakaolin at a replacement level of 20% were analyzed. In order to accelerate the steel corrosion process, all the samples were kept in a 3% NaCl solution and a constant anodic electrical potential was applied. Variations in the water to cementitious material ratio (0.5 and 0.6) and metakaolin proportion were analyzed, while the cementitious material to sand ratio was kept constant at 1:2.25 in all of the specimens. The results showed a reduction in corrosion rates when metakaolin was used as a blending admixture, especially at water to cementitious material ratio of 0.5.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600035&tlng=enelectrochemical impedance spectroscopypozzolanic materialsmetakaolinreinforcement corrosion |
| spellingShingle | Víctor Triana Juan Lizarazo-Marriaga Jhon Olaya Flórez Steel corrosion assessment by electrochemical impedance on metakaolin blended mortars Materials Research electrochemical impedance spectroscopy pozzolanic materials metakaolin reinforcement corrosion |
| title | Steel corrosion assessment by electrochemical impedance on metakaolin blended mortars |
| title_full | Steel corrosion assessment by electrochemical impedance on metakaolin blended mortars |
| title_fullStr | Steel corrosion assessment by electrochemical impedance on metakaolin blended mortars |
| title_full_unstemmed | Steel corrosion assessment by electrochemical impedance on metakaolin blended mortars |
| title_short | Steel corrosion assessment by electrochemical impedance on metakaolin blended mortars |
| title_sort | steel corrosion assessment by electrochemical impedance on metakaolin blended mortars |
| topic | electrochemical impedance spectroscopy pozzolanic materials metakaolin reinforcement corrosion |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600035&tlng=en |
| work_keys_str_mv | AT victortriana steelcorrosionassessmentbyelectrochemicalimpedanceonmetakaolinblendedmortars AT juanlizarazomarriaga steelcorrosionassessmentbyelectrochemicalimpedanceonmetakaolinblendedmortars AT jhonolayaflorez steelcorrosionassessmentbyelectrochemicalimpedanceonmetakaolinblendedmortars |