| Autor: |
Mahmoud, Hala H. A., Kalaba, Mohamed H., El-Sherbiny, Gamal M. E., Mostafa, Abdelzaher E. A., Ouf, Mohamed E. A., Tawhed, Waleed M. F. |
| Předmět: |
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| Zdroj: |
Journal of Sustainable Cement-Based Materials; Dec2022, Vol. 11 Issue 6, p465-478, 14p |
| Abstrakt: |
Bacillus flexus MK-FYT-3 and Bacillus haynesii MK-NW-9 were isolated, identified and used to construct a bacterial consortium that was able to heal small cracks of concrete and improve its properties. The results showed that the compressive and tensile strengths of bio-concrete significantly increased by (31.29, 36.3) (29, 39) % and less permeability with 21.1%, 23.1% after 7, 28 days respectively. Ultrasonic pulse velocity test was performed, and the bio-concrete gave higher values than control by 26% and 20% after 7, 28 days. In addition, surface healing of bio-concrete showed white precipitates around and inside the cracks after 7 days, which led to almost complete sealing of concrete after 28 days. The micro-analysis of bio-concrete using SEM and XRD showed crystalline precipitate with different shapes under SEM. We concluded that a bacterial consortium was able to repair and prevent the concrete cracks from spreading in addition to improving properties of concrete and that lead to increasing its life and sustainability. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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