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- W4382196769 abstract "Microbial-induced self-healing of micro cracks is an economical and effective biotechnological approach in concrete structures. The current study explores metakaolin as a suitable carrier material for immobilizing bacterial spores using adsorption technique. The developed biomaterial was stored at 4 °C and 25 °C for 180 days and showed sustainable shelf life of the bacterial spores. The biomaterial stored at 4 °C added as supplementary material during the casting of concrete significantly improved the compressive and flexural strength of concrete at 7 and 28 days. The sorptivity coefficient was 0.006 and 0.002 at 7 and 28 days, respectively, which was comparatively lower than the control. Further, the self-healing capabilities of biomaterial were investigated for approximately 0.5 mm crack in 400 × 100 × 100 mm prismatic specimens. During the crack healing period, the ultrasonic pulse velocity (UPV) was observed to improve by 21.7 % compared to the cracked specimens. The crack was completely healed with 98.2 % healing efficiency. During the healing of crack, the water tightness of the repaired surface was 92.8% efficient verifying reduction in water flow upon complete healing. At the end of testing, the precipitated mineral was assessed by field emission scanning electron microscopy and X-ray diffraction. The developed metakaolin based biomaterial can be used as self-healing supplementary cementitious material." @default.
- W4382196769 created "2023-06-28" @default.
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- W4382196769 date "2023-09-01" @default.
- W4382196769 modified "2023-10-01" @default.
- W4382196769 title "Healing of cracks in concrete by using bacterial spores immobilized in metakaolin" @default.
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- W4382196769 doi "https://doi.org/10.1016/j.istruc.2023.06.097" @default.
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