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Repair of Cracks in Concrete with the Microbial-Induced Calcite Precipitation (MICP) Method Cover

Repair of Cracks in Concrete with the Microbial-Induced Calcite Precipitation (MICP) Method

Open Access
|Dec 2023

Abstract

In this study, the microbiologically-induced calcium carbonate precipitation (MICP) method was employed to examine its potential for repairing cracks in concrete. In addition, specific gravity and porosity values were measured to examine the effect of calcite formations on concrete surfaces and microstructures. Bacteria-supplemented concrete repaired cracks up to 0.4 mm wide by filling them with CaCO3. Furthermore, this study not only examined the healing of the width but also the length of cracks. However, as the width of the treated cracks decreased, their length increased. This indicated that the MICP treatment is more effective in a limited crack range. Specific gravity values increased, and porosity values decreased in concrete supplemented with calcifying bacteria. SEM analyses showed that calcite is a bacterial product that forms a very tight bond with a cement gel and that calcite fills visible cracks and voids and creates more of a void-free and undamaged concrete structure.

DOI: https://doi.org/10.2478/sjce-2023-0021 | Journal eISSN: 1338-3973 | Journal ISSN: 1210-3896
Language: English
Page range: 1 - 8
Published on: Dec 27, 2023
Published by: Slovak University of Technology in Bratislava
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2023 Hacer Bilir Özhan, Musa Yildirim, Hamdi Öğüt, Hilal Girgin Öz, published by Slovak University of Technology in Bratislava
This work is licensed under the Creative Commons Attribution 4.0 License.