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Open AccessArticle

Development of Bacterium for Crack Healing and Improving Properties of Concrete under Wet–Dry and Full-Wet Curing

1
School of Civil Engineering, SASTRA Deemed University, Thanjavur 613401, India
2
School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613401, India
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Department of Civil Engineering, College of Engineering, Prince Sattam Bin Abdulaziz University, Alkharj 11942, Saudi Arabia
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Department of Civil Engineering, Faculty of Engineering and I.T, Amran University, Quhal, Amran 9677, Yemen
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School of Engineering, Far Eastern Federal University, 8, Sukhanova Str., 690950 Vladivostok, Russia
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Higher School of Industrial, Civil and Road Construction, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
*
Author to whom correspondence should be addressed.
Sustainability 2020, 12(24), 10346; https://doi.org/10.3390/su122410346
Received: 10 October 2020 / Revised: 27 October 2020 / Accepted: 28 October 2020 / Published: 11 December 2020
(This article belongs to the Special Issue Green Deal in Construction and Building Materials)
Concrete cracking is inevitable, coupled with increased permeability, exacerbating the adverse impacts of atmospheric conditions and chemical attacks. Calcium carbonate precipitation resulting from certain microorganisms’ metabolism is a novel approach that can self-heal the cracks and improve concrete properties. In this study, the development and effect of bacteria Bacillus cohnii on crack healing, regained compressive strength after pre-cracking, sorptivity, water absorption, and concrete microstructures were investigated. For this purpose, a Bacillus cohnii bacterial concentration of 105 cells/mL was used as a water replacement in the concrete mixtures. Two methods subsequently cured the prepared concrete specimens: wet–dry (W-D) cycle and full-wet (F-W). In the wet–dry cycle, the cast specimens were immersed in water for 24 h and then kept at room temperature for 24 h, which was considered as one cycle; this process was repeated for 28 days. In the full-wet curing, specimens were immersed in water for 28 days. However, the curing water was changed every 24 h to facilitate the essential oxygen supply for bacterial activity to precipitate calcium carbonate. The results revealed that 90% and 88% surface healing was noticed in full-wet and full-dry pre-cracked specimens at 28 days. View Full-Text
Keywords: bacteria; crack healing; compressive strength; curing; sorptivity; water absorption bacteria; crack healing; compressive strength; curing; sorptivity; water absorption
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MDPI and ACS Style

Sumathi, A.; Murali, G.; Gowdhaman, D.; Amran, M.; Fediuk, R.; Vatin, N.I.; Deeba Laxme, R.; Gowsika, T.S. Development of Bacterium for Crack Healing and Improving Properties of Concrete under Wet–Dry and Full-Wet Curing. Sustainability 2020, 12, 10346. https://doi.org/10.3390/su122410346

AMA Style

Sumathi A, Murali G, Gowdhaman D, Amran M, Fediuk R, Vatin NI, Deeba Laxme R, Gowsika TS. Development of Bacterium for Crack Healing and Improving Properties of Concrete under Wet–Dry and Full-Wet Curing. Sustainability. 2020; 12(24):10346. https://doi.org/10.3390/su122410346

Chicago/Turabian Style

Sumathi, Arunachalam; Murali, Gunasekaran; Gowdhaman, Dharmalingam; Amran, Mugahed; Fediuk, Roman; Vatin, Nikolai I.; Deeba Laxme, Ramamurthy; Gowsika, Thillai S. 2020. "Development of Bacterium for Crack Healing and Improving Properties of Concrete under Wet–Dry and Full-Wet Curing" Sustainability 12, no. 24: 10346. https://doi.org/10.3390/su122410346

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