Long term corrosion experiment of steel rebar in fly ash-based geopolymer concrete in nacl solution
This research focuses on an experimental investigation to identify the effects of fly ash on the electrochemical process of concrete during the curing time. A rebar was analysed using potentiostat to measure the rest potential, polarization diagram, and corrosion rate. Water-to-cement ratio and am...
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| Format: | Article |
| Language: | en |
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Hindawi
2016
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| Online Access: | http://eprints.uthm.edu.my/7156/1/J14205_79800bfe3adc146ac8f547d1a34df601.pdf http://eprints.uthm.edu.my/7156/ http://dx.doi.org/10.1155/2016/3853045 |
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| author | Asmara, Y. P. Siregar, J. P. Tezara, C. Wan Nurlisa, Wan Nurlisa Jamiluddin, J. |
| author_facet | Asmara, Y. P. Siregar, J. P. Tezara, C. Wan Nurlisa, Wan Nurlisa Jamiluddin, J. |
| author_sort | Asmara, Y. P. |
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| collection | Institutional Repository |
| content_provider | Universiti Tun Hussein Onn Malaysia |
| content_source | UTHM Institutional Repository |
| continent | Asia |
| country | Malaysia |
| description | This research focuses on an experimental investigation to identify the effects of fly ash on the electrochemical process of concrete
during the curing time. A rebar was analysed using potentiostat to measure the rest potential, polarization diagram, and corrosion
rate. Water-to-cement ratio and amount of fly ash were varied. After being cured for 24 hours at a temperature of 65∘
C, the samples
were immersed in 3.5% of NaCl solution for 365 days for electrochemical measurement. Measurements of the half-cell potential
and corrosion current density indicated that the fly ash has significant effects on corrosion behaviour of concrete. Although fly ash
tends to create passivity on anodic current, it increases corrosion rate. The corrosion potential of this concrete mixture decreases
compared to concrete without fly ash. From the result, it can be summarized that concrete mixture with 70% of OPC (Ordinary
Portland Cement) and 30% fly ash has shown the best corrosion resistance. |
| format | Article |
| id | my.uthm.eprints-7156 |
| institution | Universiti Tun Hussein Onn Malaysia |
| language | en |
| publishDate | 2016 |
| publisher | Hindawi |
| record_format | eprints |
| spelling | my.uthm.eprints-71562022-06-14T02:10:24Z http://eprints.uthm.edu.my/7156/ Long term corrosion experiment of steel rebar in fly ash-based geopolymer concrete in nacl solution Asmara, Y. P. Siregar, J. P. Tezara, C. Wan Nurlisa, Wan Nurlisa Jamiluddin, J. T Technology (General) This research focuses on an experimental investigation to identify the effects of fly ash on the electrochemical process of concrete during the curing time. A rebar was analysed using potentiostat to measure the rest potential, polarization diagram, and corrosion rate. Water-to-cement ratio and amount of fly ash were varied. After being cured for 24 hours at a temperature of 65∘ C, the samples were immersed in 3.5% of NaCl solution for 365 days for electrochemical measurement. Measurements of the half-cell potential and corrosion current density indicated that the fly ash has significant effects on corrosion behaviour of concrete. Although fly ash tends to create passivity on anodic current, it increases corrosion rate. The corrosion potential of this concrete mixture decreases compared to concrete without fly ash. From the result, it can be summarized that concrete mixture with 70% of OPC (Ordinary Portland Cement) and 30% fly ash has shown the best corrosion resistance. Hindawi 2016 Article PeerReviewed text en http://eprints.uthm.edu.my/7156/1/J14205_79800bfe3adc146ac8f547d1a34df601.pdf Asmara, Y. P. and Siregar, J. P. and Tezara, C. and Wan Nurlisa, Wan Nurlisa and Jamiluddin, J. (2016) Long term corrosion experiment of steel rebar in fly ash-based geopolymer concrete in nacl solution. International Journal of Corrosion, 2016. pp. 1-6. http://dx.doi.org/10.1155/2016/3853045 |
| spellingShingle | T Technology (General) Asmara, Y. P. Siregar, J. P. Tezara, C. Wan Nurlisa, Wan Nurlisa Jamiluddin, J. Long term corrosion experiment of steel rebar in fly ash-based geopolymer concrete in nacl solution |
| title | Long term corrosion experiment of steel rebar in fly ash-based geopolymer concrete in nacl solution |
| title_full | Long term corrosion experiment of steel rebar in fly ash-based geopolymer concrete in nacl solution |
| title_fullStr | Long term corrosion experiment of steel rebar in fly ash-based geopolymer concrete in nacl solution |
| title_full_unstemmed | Long term corrosion experiment of steel rebar in fly ash-based geopolymer concrete in nacl solution |
| title_short | Long term corrosion experiment of steel rebar in fly ash-based geopolymer concrete in nacl solution |
| title_sort | long term corrosion experiment of steel rebar in fly ash-based geopolymer concrete in nacl solution |
| topic | T Technology (General) |
| url | http://eprints.uthm.edu.my/7156/1/J14205_79800bfe3adc146ac8f547d1a34df601.pdf http://eprints.uthm.edu.my/7156/ http://dx.doi.org/10.1155/2016/3853045 |
| url_provider | http://eprints.uthm.edu.my/ |