Performance of Bio Concrete by Using Bacillus Pasteurii Bacteria
Abstract
In concrete, cracking is a common phenomenon due to its relatively low tensile strength , which occurs due to external loads and imposed deformations. The main research objective is to create a kind of self-healing concrete by employing mineral producing bacteria Bacillus pasteurii to locate the rift in the most favourable circumstances for autogenous healing to take place. Self-healing concrete containing bacteria has been generated for this study through the application of bacterial self-healing elements as spores and nutrients with different percentages of bacteria ranging from (10% - 25%) as a replacement of mixing water is added at the time of pouring. The bacteria influence was observed by Scanning Electron Microscope (SEM) and with Energy Dispersive X-ray Spectrometer. The mechanical properties and durability of a thirty-five mixture were examined. The optimal blending content proportion was 10SF20BC, which showed an increment in compressive strength and flexural strength compared to the control mixture to reach 79.16%, 50% respectively and 24.38% enhancement in sulfate resistance. The highest percentage of calcium carbonate precipitations was 9.49% of a weight of mixtures elements, which, in turn, revealed the highest area repair rate, which was able to fill the crack with widths leads to 0.80 mm.
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References
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DOI: 10.28991/cej-2020-03091559
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Copyright (c) 2020 Gehad Ahmed Mohammed Metwally, Mohamed Mahdy , Ahmed Hassanen Abd El-Raheem
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