Effect of Bacteria on Performance of Concrete/Mortar: A Review
Ankita Sikder1, Purnachandra Saha2

1Ankita Sikder, School of Civil Engineering, KIIT Deemed to be University, Bhubaneswar (Odisha), India.
2Purnachandra Saha, School of Civil Engineering, KIIT Deemed to be University, Bhubaneswar (Odisha), India.
Manuscript received on 29 April 2019 | Revised Manuscript received on 13 May 2019 | Manuscript Published on 28 May 2019 | PP: 12-17 | Volume-7 Issue-6C2 April 2019 | Retrieval Number: F10030476C219/2019©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Bacterial concrete is a special type of concrete where due to microbial activity mineral precipitation take place which results in self-healing and cracks repairing of concrete. Mineral precipitation due to microbial activity is a process named as Biomineralization in which calcium carbonate precipitation is formed due to microbiologically induced calcite precipitation (MICP) process. This process is natural and eco-friendly. The objective of this study is to discuss the performance of concrete/mortar with respect to self-healing, mechanical properties, and durability properties. The study shows that when bacteria used in cement treatment or during concrete production or mortar curing due to MICP process compressive and split tensile strength increase and both water absorption and porosity reduced and also a reduction in chloride permeability was observed which makes concrete more durable. So it can be concluded that bacterial concrete can be use in construction for self-healing, crack repairing and improving durability.
Keywords: Bacterial Concrete, Biomineralization, MICP, Self-healing, Mechanical Properties, Durability.
Scope of the Article: Concrete Structures