Growth environment optimization for inducing bacterial mineralization and its application in concrete healing

Wu, Mingyue; Hu, Xiangming; Zhang, Qian; Xue, Di; Zhao, Yanyun

doi:10.1016/j.conbuildmat.2019.03.181

Cited by 173 publications

(57 citation statements)

References 37 publications

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“…This result is similar to that of Wu et al [39]. The results of their experiments showed that the chloride ion permeability rate of specimens cultured in bacterial liquids could be reduced by 10.9% [39]. From these results, it can be inferred that biomineralization can indeed fill the pores in the concrete, causing the current path to be blocked, From the results of the residual compressive strength in Table 5, it can be seen that regardless of whether it is the control group, experimental group I, or experimental group II, after the ultimate bearing capacity, the 56 day residual compressive strength could not be restored to its original strength at the age of 28 days despite the different curing methods.…”

Section: Test Results Of Chloride Ion Penetration Of Biomineralized Csupporting

confidence: 93%

“…The average electric flux of experimental group II was 17,157 coulombs, which was about 9.9% lower than that of the control group. This result is similar to that of Wu et al [39]. The results of their experiments showed that the chloride ion permeability rate of specimens cultured in bacterial liquids could be reduced by 10.9% [39].…”

Section: Test Results Of Chloride Ion Penetration Of Biomineralized Csupporting

confidence: 90%

Section: Test Results Of Chloride Ion Penetration Of Biomineralized Csupporting

confidence: 88%

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Research on Improving Concrete Durability by Biomineralization Technology

Chen

Tang

2020

Sustainability

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The interfacial transition zone (ITZ) around aggregates in concrete is a weak area with higher porosity than the matrix; it breaks easily under stress and is not conducive to the durability of concrete. However, the ITZ in concrete is full of calcium hydroxide crystals, which can provide the calcium source required for biomineralization. In view of this, this study aims to use the biological activity (i.e., biomineralization technology) existing in nature to enhance the ITZ in concrete and repair concrete cracks to improve the strength and durability of concrete. In this study, the bacterial strain Sporosarcina pasteurii, which is environmentally friendly, was selected. In addition, lightweight aggregate was used as a bacterial carrier. The bacteria were first sporulated. To protect the strains, the biological species were fixed in porous lightweight aggregates. These lightweight aggregates were then used as concrete aggregates. The planned tests included concrete engineering properties (i.e., compressive strength, chloride ion penetration, and water permeability tests) and residual strength after crack repair. The test results show that the use of lightweight aggregate as a carrier and the implantation of Sporosarcina pasteurii can induce biomineralization, strengthen the ITZ, and repair small internal cracks in concrete, thereby improving the strength and durability of the concrete.

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Section: Test Results Of Chloride Ion Penetration Of Biomineralized Csupporting

confidence: 93%

Section: Test Results Of Chloride Ion Penetration Of Biomineralized Csupporting

confidence: 90%

Section: Test Results Of Chloride Ion Penetration Of Biomineralized Csupporting

confidence: 88%

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Research on Improving Concrete Durability by Biomineralization Technology

Chen

Tang

2020

Sustainability

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“…The authors in [40], isolated bacteria from carbide slag. It consists primarily of CaO and Ca(OH) 2 and has a pH of up to 12.5.…”

Section: Influence Of Bacteria On Concrete Propertiesmentioning

confidence: 99%

Bacterial Concrete as a Sustainable Building Material?

Stanaszek-Tomal

2020

Sustainability

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The right selection of building materials plays an important role when designing a building to fall within the definition of sustainable development. One of the most commonly used construction materials is concrete. Its production causes a high energy burden on the environment. Concrete is susceptible to external factors. As a result, cracks occur in the material. Achieving its durability along with the assumptions of sustainable construction means there is a need to use an environmentally friendly and effective technique of alternative crack removal in the damaged material. Bacterial self-healing concrete reduces costs in terms of detection of damage and maintenance of concrete structures, thus ensuring a safe lifetime of the structure. Bacterial concrete can improve its durability. However, it is not currently used on an industrial scale. The high cost of the substrates used means that they are not used on an industrial scale. Many research units try to reduce production costs through various methods; however, bacterial concrete can be an effective response to sustainability.

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“…Coal is the main energy source in China, accounting for about two-thirds of total primary energy consumption [1][2][3][4][5]. Plenty of environmental problems and natural disasters may occur during mining, i.e., roof fall, gas, fire, and dust pollution [6][7][8][9]. In recent years, with the rapid development of coal mining technology and the wide application of highpower mining machines, the amount of dust produced in coal mining places increased sharply and the working environment has deteriorated, which seriously threaten the safety of mine production and the health of workers [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Engineering Application of Coalbed Water Injection

Shi

Wang

Liu

et al. 2019

Mathematical Problems in Engineering

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Coalbed water injection is the most basic and effective dust-proof technology in the coal mining face. To understand the influence of coalbed water injection process parameters and coalbed characteristic parameters on coal wetting radius, this paper uses Fluent computational fluid dynamics software to systematically study the seepage process of coalbed water injection under different process parameters and coalbed characteristic parameters, calculation results of which are applied to engineering practice. The results show that the numerical simulation can help to predict the wetness range of coalbed water injection, and the results can provide guidance for the onsite design of coalbed water injection process parameters. The effect of dust reduction applied to onsite coalbed water injection is significant, with the average dust reduction rates during coal cutting and support moving being 67.85% and 46.07%, respectively, which effectively reduces the dust concentration on the working face and improves the working environment.

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Growth environment optimization for inducing bacterial mineralization and its application in concrete healing

Cited by 173 publications

References 37 publications

Research on Improving Concrete Durability by Biomineralization Technology

Research on Improving Concrete Durability by Biomineralization Technology

Bacterial Concrete as a Sustainable Building Material?

Numerical Simulation and Engineering Application of Coalbed Water Injection

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