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Bacteria-powered self-healing concrete: Breakthroughs, challenges, and future prospects
Ibrahim M Elgendy1, Nehal E Elkaliny1, Hoda M Saleh2
1Botany and Microbiology Department, Faculty of Science, Tanta University, Tanta 31527, Egypt.
Journal of Industrial Microbiology & Biotechnology
|December 14, 2024
Summary
Bio-self-healing concrete uses embedded bacteria to repair cracks by producing calcium carbonate. This sustainable innovation extends concrete infrastructure lifespan and reduces maintenance needs.
Area of Science:
- Materials Science
- Civil Engineering
- Microbiology
Background:
- Concrete structures are susceptible to degradation from environmental factors.
- Current maintenance methods for concrete infrastructure are costly and labor-intensive.
- Bio-self-healing concrete offers a novel, sustainable approach to infrastructure longevity.
Purpose of the Study:
- To review the principles and potential of bio-self-healing concrete.
- To explore the mechanisms of bacterial activation and calcium carbonate precipitation for crack repair.
- To identify challenges and future research directions for this innovative material.
Main Methods:
- Embedding dormant, alkaliphilic bacteria with spore-forming capabilities within the concrete matrix.
- Investigating bacterial activation by moisture ingress into cracks.
- Analyzing the biomineralization process of calcium carbonate for fracture self-repair.
Main Results:
- Bacteria, when activated by moisture, consume nutrients and precipitate calcium carbonate, effectively healing cracks.
- Successful demonstration of self-healing properties in concrete structures.
- Identification of key bacterial characteristics required for viability and efficacy in alkaline concrete environments.
Conclusions:
- Bio-self-healing concrete represents a paradigm shift in infrastructure maintenance, enabling structures to autonomously repair damage.
- Further research is needed to optimize bacterial strains, address production costs, and assess long-term environmental impacts.
- This technology holds significant promise for extending the service life of concrete infrastructure and promoting sustainable construction practices.
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