Abstract:Micro-cracks, which develop during the service life of reinforced concrete structures, reduce the durability of concrete through the penetration of fluids. Microbially-induced calcium carbonate precipitation (MICP) occurs naturally in the presence of ureolytic bacteria which precipitate calcium carbonate (CaCO 3) through urea hydrolysis. This deposition leads to the filling of micro-cracks and sealing of pores, reducing ingress of fluids into the concrete. The research aims were to assess the potential of Lysi… Show more
“…An extension of this method is envisioned and modelled by the Computational Colloids project [249], in which bacteria are genetically modified to induce mineral production in reaction to environmental changes in pressure, forming a self-organizing foundation for a building. Figure 8.Microbially induced deposition of calcium carbonate for self-healing of cracks in concrete [246], an example of biocementation. Images from [246] and used with license.…”
Section: Hybridizing Buildings and Biologymentioning
confidence: 99%
“…Figure 8.Microbially induced deposition of calcium carbonate for self-healing of cracks in concrete [246], an example of biocementation. Images from [246] and used with license. ( reprinted from fig.…”
Section: Hybridizing Buildings and Biologymentioning
confidence: 99%
“…( reprinted from fig. 7 (subfigures a and b ) of the Frontiers in Built Environment paper of Farrugia et al [246], , open access. Used with Creative Commons license .…”
Section: Hybridizing Buildings and Biologymentioning
confidence: 99%
“…Microbes that induce the production of minerals through biochemical reactions can be used to form a biocemented crust on a volume, a biocemented layer of a specific depth, or an overall biocementation of an entire monolithic structure [244]. In standard concrete structures such as buildings, bacteria can be intermixed to seal new cracks as they form, as in the examples of [245,246], seen in figure 8. Bacteria can also be intermixed in concrete structures in harsh conditions (e.g.…”
Section: Microorganisms and Biocementationmentioning
Biohybrid robotics takes an engineering approach to the expansion and exploitation of biological behaviours for application to automated tasks. Here, we identify the construction of living buildings and infrastructure as a high-potential application domain for biohybrid robotics, and review technological advances relevant to its future development. Construction, civil infrastructure maintenance and building occupancy in the last decades have comprised a major portion of economic production, energy consumption and carbon emissions. Integrating biological organisms into automated construction tasks and permanent building components therefore has high potential for impact. Live materials can provide several advantages over standard synthetic construction materials, including self-repair of damage, increase rather than degradation of structural performance over time, resilience to corrosive environments, support of biodiversity, and mitigation of urban heat islands. Here, we review relevant technologies, which are currently disparate. They span robotics, self-organizing systems, artificial life, construction automation, structural engineering, architecture, bioengineering, biomaterials, and molecular and cellular biology. In these disciplines, developments relevant to biohybrid construction and living buildings are in the early stages, and typically are not exchanged between disciplines. We, therefore, consider this review useful to the future development of biohybrid engineering for this highly interdisciplinary application.
“…An extension of this method is envisioned and modelled by the Computational Colloids project [249], in which bacteria are genetically modified to induce mineral production in reaction to environmental changes in pressure, forming a self-organizing foundation for a building. Figure 8.Microbially induced deposition of calcium carbonate for self-healing of cracks in concrete [246], an example of biocementation. Images from [246] and used with license.…”
Section: Hybridizing Buildings and Biologymentioning
confidence: 99%
“…Figure 8.Microbially induced deposition of calcium carbonate for self-healing of cracks in concrete [246], an example of biocementation. Images from [246] and used with license. ( reprinted from fig.…”
Section: Hybridizing Buildings and Biologymentioning
confidence: 99%
“…( reprinted from fig. 7 (subfigures a and b ) of the Frontiers in Built Environment paper of Farrugia et al [246], , open access. Used with Creative Commons license .…”
Section: Hybridizing Buildings and Biologymentioning
confidence: 99%
“…Microbes that induce the production of minerals through biochemical reactions can be used to form a biocemented crust on a volume, a biocemented layer of a specific depth, or an overall biocementation of an entire monolithic structure [244]. In standard concrete structures such as buildings, bacteria can be intermixed to seal new cracks as they form, as in the examples of [245,246], seen in figure 8. Bacteria can also be intermixed in concrete structures in harsh conditions (e.g.…”
Section: Microorganisms and Biocementationmentioning
Biohybrid robotics takes an engineering approach to the expansion and exploitation of biological behaviours for application to automated tasks. Here, we identify the construction of living buildings and infrastructure as a high-potential application domain for biohybrid robotics, and review technological advances relevant to its future development. Construction, civil infrastructure maintenance and building occupancy in the last decades have comprised a major portion of economic production, energy consumption and carbon emissions. Integrating biological organisms into automated construction tasks and permanent building components therefore has high potential for impact. Live materials can provide several advantages over standard synthetic construction materials, including self-repair of damage, increase rather than degradation of structural performance over time, resilience to corrosive environments, support of biodiversity, and mitigation of urban heat islands. Here, we review relevant technologies, which are currently disparate. They span robotics, self-organizing systems, artificial life, construction automation, structural engineering, architecture, bioengineering, biomaterials, and molecular and cellular biology. In these disciplines, developments relevant to biohybrid construction and living buildings are in the early stages, and typically are not exchanged between disciplines. We, therefore, consider this review useful to the future development of biohybrid engineering for this highly interdisciplinary application.
“…Self-healing approaches pre-bury the repairing agents in the concrete matrix and can repair cracks automatically once they appear, which can save on operation costs compared to the man-made methods [7]. According to previous studies [8,9,10,11], the self-healing approaches include autogenous, adhesive-based, mineral-admixtures-based, and bacteria-based methods. The bacteria-based self-healing repair method has attracted much attention due to its better healing capacity and environmentally friendly character.…”
Bacteria-based self-healing concrete is a construction material used to repair cracks in concrete, in which the bacterial spores are immobilized by bacteria carriers. However, the currently available bacteria carriers are not always suitable due to a complicated procedure or high cost. To develop a more suitable bacteria carrier as well as improve the anti-crack capability of self-healing concrete, in this study we evaluate the feasibility of using rubber particles as a novel bacteria carrier in self-healing concrete. Two types of self-healing concrete are prepared with rubber particles of different sizes to quantify the crack-healing effect. In addition, the fluidity and mechanical properties of the self-healing rubber concrete are compared with those of plain concrete and normal rubber concrete. The experimental results show that the self-healing rubber concrete with a particle size of 1~3 mm has a better healing capacity than the self-healing rubber concrete with a particle size of 0.2~0.4 mm, and the width value of the completely healed crack is 0.86 mm. The self-healing rubber concrete has a higher slump than the plain concrete and normal rubber concrete. According to the strength tests, the compressive strengths of the self-healing rubber concrete are low early on but they exceed those of the corresponding normal rubber concrete at 28 days. Moreover, the self-healing rubber concrete has higher splitting tensile strengths than the plain concrete and a better anti-crack capability. The results of a comparison to the other two representative bacterial carriers indicate that rubber particles have potential to be a widely used bacteria carrier for practical engineering applications in self-healing concrete.
The microbiologically induced calcite precipitation (MICP) has been extensively studied for geotechnical engineering through simultaneous action of natural phenomena and engineering processes. The focus of bacterial contribution to the MICP has been directed to calcium carbonate productivity, while the additional bacterial role as a crystal nucleation center was not explained especially from a mathematical prediction modeling point of view. Therefore, this study provides explanations and a mathematical modeling approach of bacterial influence on the MICP induced by newly-isolated ureolytic Bacillus strains and Sporosarcina pasteurii DSM 33. Using the obtained results of low-cost, rapid, and simple assays, artificial neural network modeling was applied for cell surface predispositions, pH changes as well as calcium-involved function in biofilm formation during the MICP, for the first time. Based on the obtained contribution of the alkalophilic/alkaloresistant bacteria, calcite precipitation can be significantly directed by the presence, of ureolytic bacterial cells as nucleation centers during CaCO 3 precipitation as well as their morphology, surface characteristics, potential to form a biofilm, and/or generate pH changes.
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