Developing bio-concrete in laboratory and investigating its mechanical, structural and self-healing properties (original) (raw)
2019, International Conference on Innovative Trends in Civil Engineering for Sustainable Development (ITCSD - 2019)
Concrete is a commonly used construction material and various researches are carried out for the production of more durable and eco-friendly concrete. Concrete is good in resisting compressive forces but weak in tension which leads to the formation of cracks. These cracks further increases with time and deteriorates the structure. The maintenance of which also requires costly improvement techniques with long period of time. Therefore, Bio-concrete has recently developed which is eco-friendly and a promising improvement technique for concrete characteristics. The bacteria which produces carbonate have the potential to heal the cracks without human intervention. In addition to this, these bacteria has also shown improvement on compressive strength of concrete. Therefore, it becomes important to study the characteristics of bio-concrete over the normal conventional concrete. The objective of this work is to compare the compressive and flexural strength of both types of concrete and verify the self-healing property of the bio-concrete. Various samples of concrete cubes are formed with varying the amount of bacterial solution. These cubes are then tested in laboratory for slump test, compressive strength and flexural test. Scanning Electron Microscopy is done for verification of involvement of bacteria in healing of the cracks. The findings of this project shows that bio-concrete is more durable than the conventional concrete and bacteria present in concrete senses the crack and react to fill with biologically produce limestone.
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