Feasibility study on biocomposite as a self-healer of cracks
By: Girish, S
.
Contributor(s): Lingaraj,G. Vishaka.
Publisher: USA Springer 2022Edition: Vol.103(1),Mar.Description: 227-238p.Subject(s): Humanities and Applied SciencesOnline resources: lick here
In:
Journal of the institution of engineers (India): Series ASummary: In the construction industry, durability being the critical criterion of service required to be provided by the concrete, it is of immense importance to identify and study the compatible materials to develop a self-healing concrete. This work is an attempt to study and analyze the behavioral properties at the microstructural and biochemical levels of self-healing ingredients/materials intended to be used. Based on pre-hand studies, Bacillus subtilis, Bacillus megaterium, and Lysinibacillus sphaericus encapsulated in clay pellets are selected as the self-healing microorganisms and calcium lactate as a precursor. The strength test, healing observations by microstructural analysis, and biochemical analysis prove that the selected bacterial species reveals calcite precipitation. Calcium lactate compound was also compatible to achieve the expected strength, with which Bacillus sphaericus exhibits elevated performance in the majority of the tests among the bacteria tested. The main focus of the study is on the micro-level healing mediated by the bacteria. Hence, the research work is a satisfactory approach to develop a self-healing/bio-concrete that could contribute to sustainable construction.
| Item type | Current location | Call number | Status | Date due | Barcode | Item holds |
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Articles Abstract Database
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School of Engineering & Technology Archieval Section | Not for loan | 2023-0134 |
In the construction industry, durability being the critical criterion of service required to be provided by the concrete, it is of immense importance to identify and study the compatible materials to develop a self-healing concrete. This work is an attempt to study and analyze the behavioral properties at the microstructural and biochemical levels of self-healing ingredients/materials intended to be used. Based on pre-hand studies, Bacillus subtilis, Bacillus megaterium, and Lysinibacillus sphaericus encapsulated in clay pellets are selected as the self-healing microorganisms and calcium lactate as a precursor. The strength test, healing observations by microstructural analysis, and biochemical analysis prove that the selected bacterial species reveals calcite precipitation. Calcium lactate compound was also compatible to achieve the expected strength, with which Bacillus sphaericus exhibits elevated performance in the majority of the tests among the bacteria tested. The main focus of the study is on the micro-level healing mediated by the bacteria. Hence, the research work is a satisfactory approach to develop a self-healing/bio-concrete that could contribute to sustainable construction.
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