Self-healing Conventional Concrete Using Bacteria

Pal, Smruti; Mohanty, Ipsita; Panda, Ipsita

doi:10.1007/978-981-15-4577-1_36

Cited by 8 publications

(3 citation statements)

References 26 publications

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“…The percentage of regain for the lower bacteria concentration was reported to be 75%. The regain percentages are compatible with the literature results conducted by Pal et al [22] and Khushnood et al [23]. The increase in pore size modification results from microbiologically induced calcium carbonate precipitation.…”

Section: Splitting Tensile Strengthsupporting

confidence: 92%

Efficiency of Bacteria-Based Self-Healing Mechanism in Concrete

Shaaban

Hammad

El-Nemr

et al. 2023

MSF

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Concrete is most widely used as an essential building material in the construction industry all over the globe. Concrete deteriorates over time, and cracks eventually form on its surface for many reasons, such as environmental surroundings and extra. This deterioration and cracks might lead to the ingress of water and chemicals that susceptible steel bars or reinforcements to corrosion. Since this deterioration is inevitable, maintenance and repair are also necessary. This process requires skilled labor and is cost-effective. Thus, researchers suggested alternative techniques to enhance concrete's mechanical properties and search for treatments to be applied to concrete's surface for healing and sealing the cracks by producing calcium carbonate precipitation. Therefore, self-healing concrete was introduced; this method is significant as it's proven environmentally friendly. This research aims to investigate the use of liquid bacteria incorporated in concrete mix and assess whether there would be improvements in the mechanical properties of the bacterial concrete compared to the conventional mix and an autogenous self-healing mix. Two different concentrations of an alkaliphile bacterium called Bacillus Subtilis were incorporated into the concrete mixes to test their ability to repair cracks by producing calcium carbonate and sealing them. This experiment showed a remarkable increase in bacterial concrete's compressive and tensile strengths. A visible partial crack sealing was also observed in specimens containing different concentrations of Bacillus Subtilis. Results also indicate that optimum results were obtained when the bacterial solution of concentration 108 cells/ml was incorporated, especially at early ages.

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Section: Splitting Tensile Strengthsupporting

confidence: 92%

Efficiency of Bacteria-Based Self-Healing Mechanism in Concrete

Shaaban

Hammad

El-Nemr

et al. 2023

MSF

View full text Add to dashboard Cite

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“…Moreover, the spores of bacteria cannot break the encapsulation shell easily until they encounter major cracks or deterioration. Additionally, the spore form of bacteria shows the fastest healing reaction [ 86 ]. The main advantage of this mechanism is that it is a natural, environmentally friendly method and compatible with the cement matrix.…”

Section: Self-healing Mechanismsmentioning

confidence: 99%

State-of-the-Art Report: The Self-Healing Capability of Alkali-Activated Slag (AAS) Concrete

2023

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Alkali-activated slag (AAS) has emerged as a potentially sustainable alternative to ordinary Portland cement (OPC) in various applications since OPC production contributed about 12% of global CO2 emissions in 2020. AAS offers great ecological advantages over OPC at some levels such as the utilization of industrial by-products and overcoming the issue of disposal, low energy consumption, and low greenhouse gas emission. Apart from these environmental benefits, the novel binder has shown enhanced resistance to high temperatures and chemical attacks. However, many studies have mentioned the risk of its considerably higher drying shrinkage and early-age cracking compared to OPC concrete. Despite the abundant research on the self-healing mechanism of OPC, limited work has been devoted to studying the self-healing behavior of AAS. Self-healing AAS is a revolutionary product that provides the solution for these drawbacks. This study is a critical review of the self-healing ability of AAS and its effect on the mechanical properties of AAS mortars. Several self-healing approaches, applications, and challenges of each mechanism are taken into account and compared regarding their impacts.

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“…Then after full self-healing of cracks and consumption of all water inside, bacteria return to dormancy again. For old structures where bacterial spores were not mixed from the beginning with concrete mixture, injection or spraying bacterial spores and their nutrients into the cracks are the techniques used to deal with that case (Pal et al 2020). On the other hand, fungi appear as the potent perfect candidate for this mission (Martuscelli et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Review: Microbial induced mineralization of calcium carbonate for self-healing concrete

Elkhateeb

Elnahas

Daba

2021

Asian J Nat Prod Biochem

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Abstract. Elkhateeb WA, Elnahas MO, Daba GM. 2021. Review: Microbial induced mineralization of calcium carbonate for self-Healing concrete. Asian J Nat Prod Biochem 19: 1-9. Low-cost solutions achieving concrete self-healing are attracting researchers attention. Generally, concrete self-healing mechanism has been so far accomplished by three approaches: autogenous healing, encapsulation of polymeric material, and microbial induced mineralization of calcium carbonate. Microbial approach seems like an attractive potent, relatively cheap way to achieve concrete self-healing. Hence, this review elucidates the microbial concrete self-healing mechanisms, and compare the roles of fungal and bacterial mediated self-healing concrete.

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Self-healing Conventional Concrete Using Bacteria

Cited by 8 publications

References 26 publications

Efficiency of Bacteria-Based Self-Healing Mechanism in Concrete

Efficiency of Bacteria-Based Self-Healing Mechanism in Concrete

State-of-the-Art Report: The Self-Healing Capability of Alkali-Activated Slag (AAS) Concrete

Review: Microbial induced mineralization of calcium carbonate for self-healing concrete

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