Review on carbonation study of reinforcement concrete incorporating with bacteria as self-healing approach

Alshaeer, Honin Ali Yahya and Irwan, J. M. and Alshalif, Abdullah Faisal and Al-Fakih, Amin and Ewais, Dina Yehia Zakaria and Salmi, Abdelatif and Alhokabi, Abdulmajeed Ali (2022) Review on carbonation study of reinforcement concrete incorporating with bacteria as self-healing approach. Materials, 15 (5543). pp. 1-17. ISSN 1996-1944. (Published)

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This study carried out a comprehensive review to determine the carbonation process that causes the most deterioration and destruction of concrete. The carbonation mechanism involved using carbon dioxide (CO2) to penetrate the concrete pore system into the atmosphere and reduce the alkalinity by decreasing the pH level around the reinforcement and initiation of the corrosion process. The use of bacteria in the concrete was to increase the pH of the concrete by producing urease enzyme. This technique may help to maintain concrete alkalinity in high levels, even when the carbonation process occurs, because the CO2 accelerates to the concrete and then converts directly to calcium carbonate, CaCO3. Consequently, the self-healing of the cracks and the pores occurred as a result of the carbonation process and bacteria enzyme reaction. As a result of these reactions, the concrete steel is protected, and the concrete properties and durability may improve. However, there are several factors that control carbonation which have been grouped into internal and external factors. Many studies on carbonation have been carried out to explore the effect of bacteria to improve durability and concrete strength. However, an in-depth literature review revealed that the use of bacteria as a self-healing mechanism can still be improved upon. This review aimed to highlight and discuss the possibility of applying bacteria in concrete to improve reinforcement concrete.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Bacteria; Bio-concrete; Carbonation; Concrete; Self-healing
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Faculty/Division: College of Engineering
Faculty of Civil Engineering Technology
Institute of Postgraduate Studies
Depositing User: Mr Muhamad Firdaus Janih@Jaini
Date Deposited: 31 Oct 2023 04:33
Last Modified: 31 Oct 2023 04:33
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