Effect of fly ash on the corrosion performance and structural integrity of stainless steel concrete rebars in acid rain and saline environments
The corrosion behavior of 304L stainless steel rebars in an alkaline solution simulating new concrete subjected to acid rain attack and a mildly to slightly acidic solution simulating corroded cover concrete that ex¬posed the reinforcement to direct acid rain attack, was investigated by reverse pola...
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| Language: | English |
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Gruppo Italiano Frattura
2019-10-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2611/2749 |
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| author | Angeliki G. Lekatou Sofia Tsouli Christos Nikolaidis Spyridon Kleftakis Ilias K. Tragazikis Theodoros E. Matikas |
| author_facet | Angeliki G. Lekatou Sofia Tsouli Christos Nikolaidis Spyridon Kleftakis Ilias K. Tragazikis Theodoros E. Matikas |
| author_sort | Angeliki G. Lekatou |
| collection | DOAJ |
| description | The corrosion behavior of 304L stainless steel rebars in an alkaline solution simulating new concrete subjected to acid rain attack and a mildly to slightly acidic solution simulating corroded cover concrete that ex¬posed the reinforcement to direct acid rain attack, was investigated by reverse polarization. Both solutions contained Ca(OH)2 and fly ash (0-25 wt.% of the dry mixture). Concrete cubes containing 0-25 wt.% fly ash and reinforced with 304L rebars were subjected to salt spraying for 4 m. Although the polar¬ization behaviors in the two electrolytes were different, the relative trends with respect to the fly ash contents were similar. The beneficial effect of fly ash (up to 20 wt.%) on the corrosion resistance of 304L rebars was de¬mon¬strated. How¬ever, a deteriorating effect was realized at 25 wt.% addition. Partial re¬placement of cement by fly ash did not significantly affect the tensile properties of the 304L rebar before or after 4 m of salt spraying. The elastic modulus and percent elongation presented a slight decrease after 4 m of salt spraying, ir¬respectively of FA content. Corrosion-wise, 304L can replace 316L stainless steel provided that FA has been added to the concrete mixture, even at low contents (10 or 15 wt.%). |
| format | Article |
| id | doaj-art-8f8cc0c806474f3caef6d8ee89c70dfb |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2019-10-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-8f8cc0c806474f3caef6d8ee89c70dfb2025-01-03T01:50:46ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932019-10-01135042343710.3221/IGF-ESIS.50.3610.3221/IGF-ESIS.50.36Effect of fly ash on the corrosion performance and structural integrity of stainless steel concrete rebars in acid rain and saline environmentsAngeliki G. LekatouSofia TsouliChristos NikolaidisSpyridon KleftakisIlias K. TragazikisTheodoros E. MatikasThe corrosion behavior of 304L stainless steel rebars in an alkaline solution simulating new concrete subjected to acid rain attack and a mildly to slightly acidic solution simulating corroded cover concrete that ex¬posed the reinforcement to direct acid rain attack, was investigated by reverse polarization. Both solutions contained Ca(OH)2 and fly ash (0-25 wt.% of the dry mixture). Concrete cubes containing 0-25 wt.% fly ash and reinforced with 304L rebars were subjected to salt spraying for 4 m. Although the polar¬ization behaviors in the two electrolytes were different, the relative trends with respect to the fly ash contents were similar. The beneficial effect of fly ash (up to 20 wt.%) on the corrosion resistance of 304L rebars was de¬mon¬strated. How¬ever, a deteriorating effect was realized at 25 wt.% addition. Partial re¬placement of cement by fly ash did not significantly affect the tensile properties of the 304L rebar before or after 4 m of salt spraying. The elastic modulus and percent elongation presented a slight decrease after 4 m of salt spraying, ir¬respectively of FA content. Corrosion-wise, 304L can replace 316L stainless steel provided that FA has been added to the concrete mixture, even at low contents (10 or 15 wt.%).https://www.fracturae.com/index.php/fis/article/view/2611/2749304l rebarsfly ashacid rainreverse polarizationsalt spray¬ingtensile properties |
| spellingShingle | Angeliki G. Lekatou Sofia Tsouli Christos Nikolaidis Spyridon Kleftakis Ilias K. Tragazikis Theodoros E. Matikas Effect of fly ash on the corrosion performance and structural integrity of stainless steel concrete rebars in acid rain and saline environments Fracture and Structural Integrity 304l rebars fly ash acid rain reverse polarization salt spray¬ing tensile properties |
| title | Effect of fly ash on the corrosion performance and structural integrity of stainless steel concrete rebars in acid rain and saline environments |
| title_full | Effect of fly ash on the corrosion performance and structural integrity of stainless steel concrete rebars in acid rain and saline environments |
| title_fullStr | Effect of fly ash on the corrosion performance and structural integrity of stainless steel concrete rebars in acid rain and saline environments |
| title_full_unstemmed | Effect of fly ash on the corrosion performance and structural integrity of stainless steel concrete rebars in acid rain and saline environments |
| title_short | Effect of fly ash on the corrosion performance and structural integrity of stainless steel concrete rebars in acid rain and saline environments |
| title_sort | effect of fly ash on the corrosion performance and structural integrity of stainless steel concrete rebars in acid rain and saline environments |
| topic | 304l rebars fly ash acid rain reverse polarization salt spray¬ing tensile properties |
| url | https://www.fracturae.com/index.php/fis/article/view/2611/2749 |
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