Enhanced self-healing of micro-cracks in concrete using graphene oxide encapsulated sodium alginate microcapsules: microstructure, elemental, and oxide composition analysis

Divyah, N (2024) Enhanced self-healing of micro-cracks in concrete using graphene oxide encapsulated sodium alginate microcapsules: microstructure, elemental, and oxide composition analysis. Journal of Building Pathology and Rehabilitation, 9 (1): 70. ISSN 2365-3159

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Abstract

In contemporary practice, cracked concrete is commonly healed through the application of specific cementitious materials. However, challenges persist in accurately detecting the cracks and effectively treating them. As a result, significant research attention has been devoted to concrete imbued with self-healing properties.Factors such as shrinkage during drying, temperature changes, and chemical reactions can lead to the creation of microcracks. Self-healing microcracks provide a novel solution to the problem of cracks in concrete buildings. The notion entails the ability of concrete to autonomously repair or close minor cracks that may form gradually. This study specifically examines the integration of microbeads containing healing agents into the mortar mix, despite the existence of other self-healing processes. Upon the occurrence of a crack, these microbeads break, therefore releasing the healing chemicals that subsequently react to close the crack effectively. The study employed Graphene Oxide (GO) and Graphene Oxide (GO) encapsulated with Sodium Alginate (SA) as the healing agents. The study determines that the combination of SA and GO has a self-healing effect and a pore-filling effect, which results in the densification of the pore structure and filling of pre-existing micro fractures. The scanning electron microscopy (SEM) study showed a decrease in pre-existing cracks and an enhanced resistance to the development of new cracks. The energy exhibited by Calcium (Ca), Silicon (Si), and Oxygen (O) was 25, 21, and 9.5 cps/eV, respectively, in the combination of GO and SA, in comparison to the other mix.

Item Type: Article
Subjects: B Civil Engineering > Concrete Technology
Divisions: Civil Engineering
Depositing User: Users 5 not found.
Date Deposited: 22 Aug 2024 10:36
Last Modified: 22 Aug 2024 10:36
URI: https://ir.psgitech.ac.in/id/eprint/996

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