Aboulela, A. orcid.org/0000-0001-5817-1652, Peyre-Lavigne, M., Patapy, C. et al. (1 more author) (2018) Evaluation of the resistance of CAC and BFSC mortars to biodegradation : laboratory test approach. In: Alexander, M.G., Beushausen, H., Dehn, F. and Moyo, P., (eds.) MATEC Web of Conferences. International Conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR 2018), 19-21 Nov 2018, Cape Town, South Africa. EDP Sciences
Abstract
Biodeterioration of cementitious materials in sewer networks is a major concern for health and economic reasons. Essentially, it is due to the biological oxidation of H2S into H2SO4 leading to a local progressive dissolution of the cementitious matrix and the precipitation of expansive products likely to provoke cracks. However, it is widely known that CAC has a better performance in such environments but the mechanisms are not very well understood. Nevertheless, previous studies focused mainly on measuring the mass loss of the specimens accompanied with little information on the chemical alteration of the cementitious matrix. This study aims to compare the performance of CAC and BFSC mortars in sewer conditions using laboratory test (BAC-test). Leaching kinetics were evaluated by concentrations measurements of cementitious cations in the leached solutions and of sulphate production by the microorganisms. Moreover, SEM observations coupled with EDS analyses allowed the identification of the chemical alteration of the cementitious matrix.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Editors: |
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Copyright, Publisher and Additional Information: | © 2018 The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/). |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 08 Feb 2022 12:32 |
Last Modified: | 08 Feb 2022 12:32 |
Status: | Published |
Publisher: | EDP Sciences |
Refereed: | Yes |
Identification Number: | 10.1051/matecconf/201819902004 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:183398 |