Mundra, S, Bernal, SA orcid.org/0000-0002-9647-3106, Criado, M et al. (5 more authors) (2021) Steel corrosion in reinforced alkali-activated materials. RILEM Technical Letters, 2. pp. 33-39. ISSN 2518-0231
Abstract
The development of alkali-activated materials (AAMs) as an alternative to Portland cement (PC) has seen significant progress in the past decades. However, there still remains significant uncertainty regarding their long term performance when used in steel-reinforced structures. The durability of AAMs in such applications depends strongly on the corrosion behaviour of the embedded steel reinforcement, and the experimental data in the literature are limited and in some cases inconsistent. This letter elucidates the role of the chemistry of AAMs on the mechanisms governing passivation and chloride-induced corrosion of the steel reinforcement, to bring a better understanding of the durability of AAM structures exposed to chloride. The corrosion of the steel reinforcement in AAMs differs significantly from observations in PC; the onset of pitting (or the chloride ‘threshold’ value) depends strongly on the alkalinity, and the redox environment, of these binders. Classifications or standards used to assess the severity of steel corrosion in PC appear not to be directly applicable to AAMs due to important differences in pore solution chemistry and phase assemblage.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author (s) 2017. This article is published with open access and licensed under a Creative Commons Attribution 4.0 International License. |
Keywords: | Alkali‐activated materials; Corrosion; Chloride; Redox processes |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 29 Sep 2021 13:29 |
Last Modified: | 29 Sep 2021 13:29 |
Status: | Published |
Publisher: | RILEM Technical Letters |
Identification Number: | 10.21809/rilemtechlett.2017.39 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:178585 |