Abstract
This paper outlines the possibility of producing a novel, green and economical concrete based on biomineralization. Cement an important ingredient of concrete is expensive, and production of cement leads to around 8–10 % of CO\(_{2 }\) emissions. Significant efforts have been put by researchers to find alternative that will reduce burden of high cost, high energy consumed and environment impacts. Fly ash (FA) has been used as an alternative to reduce impact of cement. However, its replacement to cement limits to low percentage. The present work aims to develop a sustainable FA concrete by blending with varying dosages of bacteria. The concrete specimens were tested for compressive strength, split tensile strength, shear strength and sorptivity test at 7 and 28 days of curing. Bacterial concrete with 0 % FA obtained best results for strength property, but with increasing the percentage of FA the strength property was found to decrease. Results showed that bacterial concrete was more effective in minimizing sorptivity property in the presence of FA. The improvement in property of bacterial concrete was confirmed due to the calcium carbonate precipitation as evidenced in SEM analysis. The bacterium incorporated into the concrete mixture is safe and eco-friendly. Thus, findings suggest that the combination of bacteria and FA minimizes the demand of cement and reduces emission of greenhouse gases and adds sustainability to the concrete.
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Kadapure, S.A., Kulkarni, G.S. & Prakash, K.B. A Laboratory Investigation on the Production of Sustainable Bacteria-Blended Fly Ash Concrete. Arab J Sci Eng 42, 1039–1048 (2017). https://doi.org/10.1007/s13369-016-2285-1
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DOI: https://doi.org/10.1007/s13369-016-2285-1