Wang, J, Basheer, PAM, Nanukuttan, SV et al. (2 more authors) (2016) Influence of service loading and the resulting micro-cracks on chloride resistance of concrete. Construction and Building Materials, 108. pp. 56-66. ISSN 0950-0618
Abstract
Chloride-induced corrosion of steel in reinforced concrete structures is one of the main problems affecting their durability, but most previous research projects and case studies have focused on concretes without cracks or not subjected to any structural load. Although it has been recognised that structural cracks do influence the chloride transport and chloride induced corrosion in reinforced concrete structures, there is little published work on the influence of micro-cracks due to service loads on these properties. Therefore the effect of micro-cracks caused by loading on chloride transport into concrete was studied. Four different stress levels (0%, 25%, 50% and 75% of the stress at ultimate load – fu) were applied to 100mm diameter concrete discs and chloride migration was measured using a bespoke test setup based on the NT BUILD 492 test. The effects of replacing Portland cement CEMI by ground granulated blast-furnace (GGBS), pulverised fuel ash (PFA) and silica fume (SF) on chloride transport in concrete under sustained loading were studied. The results have indicated that chloride migration coefficients changed little when the stress level was below 50% of the fu; however, it is desirable to keep concrete stress less than 25% fu if this is practical. The effect of removing the load on the change of chloride migration coefficient was also studied. A recovery of around 50% of the increased chloride migration coefficient was found in the case of concretes subjected to 75% of the fu when the load was removed.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/). |
Keywords: | Chloride Transport; Service Life; Micro-cracks; Load Effect; Stress Level |
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: | 21 Jan 2016 09:49 |
Last Modified: | 23 Jun 2023 21:58 |
Published Version: | http://dx.doi.org/10.1016/j.conbuildmat.2016.01.00... |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.conbuildmat.2016.01.005 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:93485 |