Holmes, N, O'Brien, R and Basheer, PAM orcid.org/0000-0002-0835-8029 (2014) Engineering performance of a new siloxane-based corrosion inhibitor. Materials and Structures, 47 (9). pp. 1531-1543. ISSN 1359-5997
Abstract
This paper presents an evaluation of a new non-toxic corrosion inhibitor on selected engineering properties of concrete mixes with different cementitious materials following a corrosion and durability study on concrete samples. Corrosion inhibitors consist of powders or solutions which are added to concrete when mixed to prevent or delay corrosion of steel by their reaction with ferrous ions to form a stable and passive ferric oxide film on the steel surface. The new inhibitor functions slightly differently and its corrosion inhibition effect is due to the formation of a siloxane coating on the steel surface. Therefore, the performance of the new inhibitor in concrete mixes manufactured with CEM I, PFA and GGBS cements was compared against a well known and established corrosion inhibitor on the market, namely calcium nitrite in terms of their effect on workability (measured in terms of slump), compressive strength, freeze–thaw durability and macro-cell corrosion. The results from this experimental programme have demonstrated that the new inhibitor is effective in reducing or slowing down corrosion. In addition, it was found that CEM I concrete containing the new inhibitor was less penetrable to chlorides than that without. A similar set of results was obtained for the freeze–thaw resistance, but the compressive strength was found to decrease with the addition of the new inhibitor. In the case of concretes containing PFA and GGBS, the new inhibitor was found to be less effective. Further, long-term investigations are recommended to assess the effectiveness over time.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © RILEM 2013. This is an author produced version of a paper published in Materials and Structures. The final publication is available at Springer via http://dx.doi.org/10.1617/s11527-013-0133-2. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Corrosion inhibitor; Corrosion; Durability; Calcium nitrite; Encapsulated siloxane |
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) > Institute for Resilient Infrastructure (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Aug 2016 14:19 |
Last Modified: | 18 Jan 2018 11:33 |
Published Version: | http://dx.doi.org/10.1617/s11527-013-0133-2 |
Status: | Published |
Publisher: | Springer Verlag (Germany) |
Identification Number: | 10.1617/s11527-013-0133-2 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:93481 |