| Title: | Characterizing steel corrosion in different alkali-activated mortars |
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| Authors: | ID Gartner, Nina (Author)
ID Hren, Miha (Author)
ID Kosec, Tadeja (Author)
ID Legat, Andraž (Author) |
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| Files: |  URL - Source URL, visit https://www.mdpi.com/1996-1944/14/23/7366
 PDF - Presentation file, download (7,00 MB)
MD5: C32401C384EEE7CBC7ADCD6129559E27
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  ZAG - Slovenian National Building and Civil Engineering Institute
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| Abstract: | Alkali-activated materials (AAMs) present a promising potential alternative to ordinary Portland cement (OPC). The service life of reinforced concrete structures depends greatly on the corrosion resistance of the steel used for reinforcement. Due to the wide range and diverse properties of AAMs, the corrosion processes of steel in these materials is still relatively unknown. Three different alkali-activated mortar mixes, based on fly ash, slag, or metakaolin, were prepared for this research. An ordinary carbon-steel reinforcing bar was installed in each of the mortar mixes. In order to study the corrosion properties of steel in the selected mortars, the specimens were exposed to a saline solution in wet/dry cycles for 17 weeks, and periodic electrochemical impedance spectroscopy (EIS) measurements were performed. The propagation of corrosion damage on the embedded steel bars was followed using X-ray computed microtomography (XCT). Periodic EIS measurements of the AAMs showed different impedance response in individual AAMs. Moreover, these impedance responses also changed over the time of exposure. Interpretation of the results was based on visual and numerical analysis of the corrosion damages obtained by XCT, which confirmed corrosion damage of varying type and extent on steel bars embedded in the tested AAMs. |
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| Keywords: | corrosion, alkali-activated mortars, steel reinforcement, electrochemical impedance spectroscopy, X-ray computed microtomography, visual analysis |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 30.11.2021 |
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| Publisher: | Molecular Diversity Preservation International |
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| Year of publishing: | 2021 |
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| Number of pages: | str. 1-14 |
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| Numbering: | Vol. 14, iss. 23 |
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| PID: | 20.500.12556/DiRROS-16102  |
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| UDC: | 620.1/.2 |
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| ISSN on article: | 1996-1944 |
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| DOI: | 10.3390/ma14237366 |
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| COBISS.SI-ID: | 88913923 |
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| Copyright: | © 2021 by the authors.
Licensee MDPI, Basel, Switzerland. |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 10. 12. 2021;
Št. članka 7366;
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| Publication date in DiRROS: | 05.07.2023 |
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| Views: | 386 |
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| Downloads: | 180 |
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