Corrosion monitoring by open circuit potential in steel reinforcements embedded in cementitious composites with industrial wastes
Corrosion is one of the main issues affecting service life of reinforced concrete structures. The Open Circuit Potential (OCP) technique is a non-destructive method used to survey and monitor this problem. This test can also be used in laboratory environment and provide valuable information supporti...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-06-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522001747 |
| _version_ | 1811337298596331520 |
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| author | Thiago A. Hemkemeier Fernando C.R. Almeida Almir Sales Agnieszka J. Klemm |
| author_facet | Thiago A. Hemkemeier Fernando C.R. Almeida Almir Sales Agnieszka J. Klemm |
| author_sort | Thiago A. Hemkemeier |
| collection | DOAJ |
| description | Corrosion is one of the main issues affecting service life of reinforced concrete structures. The Open Circuit Potential (OCP) technique is a non-destructive method used to survey and monitor this problem. This test can also be used in laboratory environment and provide valuable information supporting the selection process of supplementary materials for durable concretes. Although this qualitative technique is commonly used, there is still a lack of consensus on the suitability of specific procedures for experimental analysis, such as type of reference electrode and influence of accelerated aging procedures (adoption of wetting/drying cycles and level of immersion of specimens). Therefore, the present study aims to evaluate the method for prediction of early steel corrosion activity in the accelerated OCP tests. The paper is focused on testing eco-efficient cementitious composites containing industrial wastes, such as sugarcane bagasse ash sand (SBAS) and water treatment plant sludge (WTPS), in replacement of natural sand. The results showed that an adoption of combined wetting/drying cycles, together with a partial (rather than total) immersion of specimens in NaCl solution, leads to earlier appearance of corrosion. This allows to shorten the period of testing by almost 10 weeks. It is due to higher access to oxygen and higher concentration of free chlorides from the saline solution accumulated in a porous system. The type of reference electrode is of lesser importance. Moreover, incorporation of 30% SBAS and 3% WTPS results in higher protection for steel corrosion, confirming wide applicability of the OCP technique to any cementitious matrices with or without industrial wastes. |
| first_indexed | 2024-04-13T17:52:47Z |
| format | Article |
| id | doaj.art-e3548e9b21104ff5af12e5e7162aa43c |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-13T17:52:47Z |
| publishDate | 2022-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-e3548e9b21104ff5af12e5e7162aa43c2022-12-22T02:36:38ZengElsevierCase Studies in Construction Materials2214-50952022-06-0116e01042Corrosion monitoring by open circuit potential in steel reinforcements embedded in cementitious composites with industrial wastesThiago A. Hemkemeier0Fernando C.R. Almeida1Almir Sales2Agnieszka J. Klemm3Department of Civil Engineering, Federal University of São Carlos, Via Washington Luís, km 235, São Carlos, SP 13565-905, BrazilDepartment of Materials Engineering and Construction, Federal University of Minas Gerais, Av. Presidente Antônio Carlos, 6627, Belo Horizonte, MG 31270-901, Brazil; Corresponding author.Department of Civil Engineering, Federal University of São Carlos, Via Washington Luís, km 235, São Carlos, SP 13565-905, BrazilGlasgow Caledonian University, School of Computing, Engineering and Built Environment, Cowcaddens Road, Glasgow G4 0BA, UKCorrosion is one of the main issues affecting service life of reinforced concrete structures. The Open Circuit Potential (OCP) technique is a non-destructive method used to survey and monitor this problem. This test can also be used in laboratory environment and provide valuable information supporting the selection process of supplementary materials for durable concretes. Although this qualitative technique is commonly used, there is still a lack of consensus on the suitability of specific procedures for experimental analysis, such as type of reference electrode and influence of accelerated aging procedures (adoption of wetting/drying cycles and level of immersion of specimens). Therefore, the present study aims to evaluate the method for prediction of early steel corrosion activity in the accelerated OCP tests. The paper is focused on testing eco-efficient cementitious composites containing industrial wastes, such as sugarcane bagasse ash sand (SBAS) and water treatment plant sludge (WTPS), in replacement of natural sand. The results showed that an adoption of combined wetting/drying cycles, together with a partial (rather than total) immersion of specimens in NaCl solution, leads to earlier appearance of corrosion. This allows to shorten the period of testing by almost 10 weeks. It is due to higher access to oxygen and higher concentration of free chlorides from the saline solution accumulated in a porous system. The type of reference electrode is of lesser importance. Moreover, incorporation of 30% SBAS and 3% WTPS results in higher protection for steel corrosion, confirming wide applicability of the OCP technique to any cementitious matrices with or without industrial wastes.http://www.sciencedirect.com/science/article/pii/S2214509522001747Steel corrosionReinforced concreteOpen Circuit Potential (OPC) techniqueNon-destructive methodWater treatment plant sludge (WTPS)Sugarcane bagasse ash sand (SBAS) |
| spellingShingle | Thiago A. Hemkemeier Fernando C.R. Almeida Almir Sales Agnieszka J. Klemm Corrosion monitoring by open circuit potential in steel reinforcements embedded in cementitious composites with industrial wastes Case Studies in Construction Materials Steel corrosion Reinforced concrete Open Circuit Potential (OPC) technique Non-destructive method Water treatment plant sludge (WTPS) Sugarcane bagasse ash sand (SBAS) |
| title | Corrosion monitoring by open circuit potential in steel reinforcements embedded in cementitious composites with industrial wastes |
| title_full | Corrosion monitoring by open circuit potential in steel reinforcements embedded in cementitious composites with industrial wastes |
| title_fullStr | Corrosion monitoring by open circuit potential in steel reinforcements embedded in cementitious composites with industrial wastes |
| title_full_unstemmed | Corrosion monitoring by open circuit potential in steel reinforcements embedded in cementitious composites with industrial wastes |
| title_short | Corrosion monitoring by open circuit potential in steel reinforcements embedded in cementitious composites with industrial wastes |
| title_sort | corrosion monitoring by open circuit potential in steel reinforcements embedded in cementitious composites with industrial wastes |
| topic | Steel corrosion Reinforced concrete Open Circuit Potential (OPC) technique Non-destructive method Water treatment plant sludge (WTPS) Sugarcane bagasse ash sand (SBAS) |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522001747 |
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