Bio-inspired self-healing of concrete cracks using new B. pseudomycoides species

Algaifi, Hassan Amer; Bakar, Suhaimi Abu; Alyousef, Rayed; Sam, Abdul Rahman Mohd; Ibrahim, Mohd Halim Irwan; Shahidan, Shahiron; Ibrahim, Mohammed; Salami, Babatunde Abiodun

doi:10.1016/j.jmrt.2021.03.037

Cited by 37 publications

(8 citation statements)

References 88 publications

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“…While microbial-mediated self-healing has been extensively studied in conventional concrete (Algaifi et al, 2021;Andalib et al, 2016;Chen et al, 2019;Feng et al, 2021;Khaliq & Ehsan, 2016;Luo et al, 2015;Mondal & Ghosh, 2018;Rao et al, 2015), its applicability and effectiveness in high-strength concrete (HSC) require further investigation. High-strength concrete has a denser microstructure and often contains supplementary cementitious materials, affecting the availability of nutrients and the growth of bacteria (Jonkers et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Enhancing Structural Resilience: Microbial-Based Self-Healing in High-Strength Concrete

Mohammed,

Kasie,

Assefa

et al. 2024

Int J Concr Struct Mater

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Concrete’s weak tensile strength renders it susceptible to cracking under prolonged loads, leading to reduced load-bearing capacity and reinforcing bar corrosion. This study investigates the effectiveness of microbial-based self-healing in high-strength concrete, focusing on two bacterial strains: Sporosarcina koreensis and Bacillus. Results demonstrate significant enhancements in micro- and macro-physical properties of high-strength bacterial concrete with Bacillus flexus and S. koreensis, surpassing the control. Bacillus flexus-infused concrete exhibits a remarkable 21.8% increase in compressive strength at 7 days and 11.7% at 56 days. Similarly, S. koreensis-treated concrete shows 12.2% and 7.4% increases at 7 and 56 days, respectively. Enhanced crack healing occurs due to calcite precipitation, confirmed by X-ray diffraction and scanning electron microscopy. Both bacterial strains achieve crack closure within 42 days, with widths of 259.7 µm and 288.7 µm, respectively. Moreover, bacterial concrete from these strains excels in durability against water, acid, and salt exposure, surpassing control concrete. These findings emphasize microbial-based self-healing’s potential in high-strength concrete, providing a practical strategy to enhance structural resilience and extend concrete infrastructure lifespan.

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Section: Introductionmentioning

confidence: 99%

Enhancing Structural Resilience: Microbial-Based Self-Healing in High-Strength Concrete

Mohammed,

Kasie,

Assefa

et al. 2024

Int J Concr Struct Mater

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“…This is caused by mechanical, physical, chemical processes, or those originating from human activities. These processes can accelerate the appearance of cracks in concrete (Ariyanto, 2020;Algaifi et al, 2020). Cracks can also occur when the concrete surface frequently interacts directly with water, because water is an element that is very easily absorbed by the pores of the concrete.…”

Section: Introductionmentioning

confidence: 99%

Effect E. coli Bacteria Concentration as Self Healing on Compressive Strength and Hydrophobic Properties on Micro Cracks of Concrete

Octriany,

Ratnawulan

2023

jppipa, pendidikan ipa, fisika, biologi, kimia

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Buildings are facilities created by humans to support various human activities. Potential damage to old buildings, such as the appearance of cracks in building concrete. Self-healing is carried out by bacteria to repair micro cracks that occur in concrete by deposition of CaCO3. Bacteria-based preservatives consist of bacterial spores and organic compounds that are incorporated into the concrete structure. This research aims to determine the effect of variations in the concentration of E. coli bacteria on compressive strength and contact angle. Based on the results of the research data, two research results can be stated. First, the concentration of bacteria affects the compressive strength of the concrete and the maximum compressive strength occurs on day 14. Second, the concentration of bacteria affects the contact angle of the concrete so that it can be said that the concrete is hydrophobic. As for the XRD characterization, intensity data (I), diffraction angle ( ) were analyzed using High Score Plus. FTIR characterization was carried out in the range 4000 cm-1-500 cm-1. SEM characterization to see the morphology of the concrete with a magnification of 2500 times. SEM can also show E. coli bacteria in concrete

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“…In particular, microbial calcium carbonate is precipitated and deposited on the bacterial cells due to the chemical reactions between developed carbonate ions from metabolic activity and calcium ions are generated inside the concrete matrix. This microbial calcium carbonate proved its ability to heal concrete cracks up to 0.4 mm; however, the healing efficiency in the deeper part of cracks is still limited [9][10][11][12][13]. In addition, this phenomenon, called microbiologically induced calcite precipitation (MICP), which has been subjected to more developments, includes the potential to use the microbial enzyme and as a replacement for microbial cells itself.…”

Section: Introductionmentioning

confidence: 99%

Critical Analysis for Life Cycle Assessment of Bio-Cementitious Materials Production and Sustainable Solutions

et al. 2022

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The purpose of this study is to study the life cycle assessment of biocementitious materials production in comparison to traditional cement materials production. The environmental impact of production processes over the life cycle was evaluated on the basis of global warming and ozone depletion, human health, land, freshwater, marine ecotoxicity, and natural water system eutrophication. LCA uses endpoint methods (ECO indicators) and SimaPro 8 software to assess the health and environmental impact of raw materials used in the production process, including cement, Ca(NO3)2·4H2O, urea, molasses, and electricity. The results showed that cement materials made 82.88% of the world’s warming in all raw materials used in production processes, 87.24% of the world’s health, 89.54% of the deforestation of freshwater, and 30.48% to marine eutrophication. Ca(NO3)2·4H2O contributes by 58.88% to ozone depletion, 15.37 to human carcinogenic toxicity, 3.19% to freshwater eutrophication, and 11.76% to marine eutrophication. In contrast, urea contributes 38.15% to marine eutrophication and 5.25% to freshwater eutrophication. Molasses contribute by 13.77% to marine eutrophication. Cement contributes 74.27% to human health damage, 79.36% to ecosystem damage; Ca(NO3)2·4H2O contributes 13.54% to human health damage and 9.99% to ecosystem damage; while urea contributes 6.5% to human health damage and 5.91% to ecosystem damage. Bio-cementitious wastewater should undergo a treatment process to remove urea and molasses residues, as well as nitrates, before final disposal into the environment.

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Bio-inspired self-healing of concrete cracks using new B. pseudomycoides species

Cited by 37 publications

References 88 publications

Enhancing Structural Resilience: Microbial-Based Self-Healing in High-Strength Concrete

Enhancing Structural Resilience: Microbial-Based Self-Healing in High-Strength Concrete

Effect E. coli Bacteria Concentration as Self Healing on Compressive Strength and Hydrophobic Properties on Micro Cracks of Concrete

Critical Analysis for Life Cycle Assessment of Bio-Cementitious Materials Production and Sustainable Solutions

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