Review of the Durability of Bacterial Concrete in Marine Environments

DOI: https://doie.org/10.1205/Jbse.2024284940

Prajeesha M. P , Dr. S. Packialakshmi

Keywords:

Marine Environments, Bacterial Concrete, self-healing concrete, Bacillus and Durability

Abstract:

This review examines the durability of bacterial concrete in marine environments. Bacterial concrete (BC), also well-known as Self-Healing Concrete (SHC), utilizes bacteria that can precipitate Calcium Carbonate (CC) to repair cracks. Bacterial concrete's cost-effectiveness and sustainability in marine environments are crucial factors for its widespread adoption. The study focuses on recent research investigating the performance of bacterial concrete in marine settings, considering factors such as bacterial species, environmental conditions, and concrete composition. It discusses evaluation techniques for durability against chloride ingress, carbonation, and sulphate attack. Bacterial concrete relies on the metabolic activity of calciteprecipitating bacteria, typically belonging to the genera Bacillus and Sporosarcina. These bacteria facilitate the formation of calcium carbonate crystals within cracks, effectively sealing them and reducing the ingress of aggressive agents. The review delves into the biochemical processes involved in microbial-induced calcite precipitation, highlighting how bacterial activities contribute to crack healing and increased durability.The study also addresses long-term sustainability and challenges in implementing bacterial concrete in marine structures, offering insights for engineers and researchers. The findings contribute to understanding the viability and potential of bacterial concrete for durable and resilient marine applications.

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