Bio-consolidation of cracks with fly ash amended biogrouting in concrete structures

Joshi, Sumit; Goyal, Shweta; Reddy, M. Sudhakara

doi:10.1016/j.conbuildmat.2021.124044

Cited by 23 publications

(7 citation statements)

References 35 publications

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“…In this case the fly ash modified cement slurry was used to repair cracks and evaluate the flexural strength after curing. It was observed that in all the samples analyzed the strength recovery is positive, being 26% higher in the concrete with 40% fly ash cement slurry compared to the control concrete; likewise, the concrete with bacterial slurry with spray and puddling treatment was better by 10% and 76.3%, respectively [46]. As can be noted, crack repair with 40% fly ash modified bacterial slurry would serve as a potential healing product for concrete structures.…”

Section: Flexural Strengthmentioning

confidence: 75%

“…In bioconcretes with Sporosarcina pasteurii, in addition to the substrate [23,26] and type of aggregates [14,39,42] used in the designs, interestingly, its effect was evaluated when subjected to special conditions, such as compressive strength, crack depth, as well as the water/cement ratio in the mix [41]. In relation to experimental designs with increasing stimulus, it has been applied in relation to the bacterial concentration [17,28,36,43,44], substrate [36,45], recycled aggregate [28], fly ash [44,46] and fiber used [11,47]. It has been shown that increasing up to a certain bacterial concentration favors the properties of concrete, as long as the curing water is potable, since these are reduced if salt water is used, but this is not the case with Dunaliella salina, which has the ability to improve the properties of concrete and even more when increasing its concentration in the mixture and this is due to the fact that it is halophilic [17].…”

Section: Resultsmentioning

confidence: 99%

“…Mixtures with fly ash (class F) and with Bacillus sp. bacterial suspension (4×10 8 cells/mL) increased the compressive strength by 11% and 40%, respectively [46]; the best values were given for B. pasteurii at 60 days, with a concentration of 10 5 cells/mL for fly ash at 0%, 10%, 20% and 30%, probably due to the precipitation and accumulation of CaCO3 induced by bacteria in the matrix of concrete with fly ash [44]. The presence of CaCO3 in concrete was determined by X-ray fluorescence (XRF) and scanning electron microscopy (SEM) microstructural analysis.…”

Section: Compressive Strengthmentioning

confidence: 98%

“…The puddling curing method with bacterial suspension proved to be the most efficient [46]. Using Bacillus Subtilis and Bacillus Sphaericus, precipitation was observed at the crack corners on the fifth day and half of the cracks were sealed at 14 days.…”

Section: Concrete Self-healingmentioning

confidence: 99%

See 3 more Smart Citations

Bacterial Self-Healing of Concrete: A Scoping Review

Farfán Córdova,

Díaz Ortega

2023

Preprint

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This article is a scoping review analyzing advances in experimental studies on bacterial self-healing of concrete. From Scopus, ScienceDirect, Web of Science and Google Scholar search engine databases, 54 studies were selected for analysis, and an increasing trend of publications since 2015 was found, with India as the country with the largest research presence. Different ma-terials are used as replacement or admixture in concrete, such as fibers, particles and recycled material from construction waste. It was found that the most commonly used bacteria are Bacillus subtilis and Bacillus sphaericus, which can improve the strength of concrete by generating calcite and sealing cracks. In addition, it was found that the presence of materials such as fibers, ashes and construction recyclates can protect bacteria in an alkaline environment. The designs usually in-clude more than two experimental groups and a control. In summary, this study highlights the importance of bacterial self-healing in concrete and provides information on advances in this field of research.

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Section: Flexural Strengthmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 99%

Section: Compressive Strengthmentioning

confidence: 98%

Section: Concrete Self-healingmentioning

confidence: 99%

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Bacterial Self-Healing of Concrete: A Scoping Review

Farfán Córdova,

Díaz Ortega

2023

Preprint

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“…In biogrouting applications, Joshi et al (2021) studied the strain Bacillus sp. CT5, looking into the effectiveness of bio-based fly ashmodified cementitious grout.…”

Section: Biogroutmentioning

confidence: 99%

A review of durability improvement in concrete due to bacterial inclusions

Bandlamudi

Kar²,

Dutta³

2023

Front. Built Environ.

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Since the invention of industrially produced Portland cement in the nineteenth century, concrete has been the world’s most frequently used construction material. Because of the significant CO2 emissions produced during cement manufacture and concrete maintenance and repair costs, sustainably improving concrete durability has become a topic of concern. Bacterial self-healing is a unique method that uses CaCO3 precipitation to repair cracks in concrete, thereby improving the structure’s durability. This review highlights the effect of bacterial treatment on concrete durability. The permeation properties, water absorption, and mechanical properties are assessed. Emphasis is laid on the selection of bacteria and bacteria nutrients. The paper overviews the morphological analysis of CaCO3 precipitation by bacterial concrete. Despite the benefits of bacterial technology in concrete, numerous critical concerns remain unresolved. Further investigation on nutrients is required to develop a multi-nutrient system that will improve the efficiency of bacterial precipitation since a good combination of low-cost nutrients would reduce the total cost of bacterial concrete.

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Concurrent Carbon Capture and Biocementation through the Carbonic Anhydrase (CA) Activity of Microorganisms -a Review and Outlook

Mwandira,

Mavroulidou,

Gunn

et al. 2023

Environ. Process.

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Biocementation, i.e., the production of biomimetic cement through the metabolic activity of microorganisms, offers exciting new prospects for various civil and environmental engineering applications. This paper presents a systematic literature review on a biocementation pathway, which uses the carbonic anhydrase (CA) activity of microorganisms that sequester CO2 to produce biocement. The aim is the future development of this technique for civil and (geo-)environmental engineering applications towards CO2-neutral or negative processes. After screening 248 potentially relevant peer-reviewed journal papers published between 2002 and 2023, 38 publications studying CA-biocementation were considered in the review. Some of these studies used pure CA enzyme rather than bacteria-produced CA. Of these studies, 7 used biocementation for self-healing concrete, 6 for CO2 sequestration, 10 for geotechnical applications, and 15 for (geo-)environmental applications. A total of 34 bacterial strains were studied, and optimal conditions for their growth and enzymatic activity were identified. The review concluded that the topic is little researched; more studies are required both in the laboratory and field (particularly long-term field experiments, which are totally lacking). No studies on the numerical modelling of CA-biocementation and the required kinetic parameters were found. The paper thus consulted the more widely researched field of CO2 sequestration using the CA-pathway, to identify other microorganisms recommended for further research and reaction kinetic parameters for numerical modelling. Finally, challenges to be addressed and future research needs were discussed.

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Bio-consolidation of cracks with fly ash amended biogrouting in concrete structures

Cited by 23 publications

References 35 publications

Bacterial Self-Healing of Concrete: A Scoping Review

Bacterial Self-Healing of Concrete: A Scoping Review

A review of durability improvement in concrete due to bacterial inclusions

Concurrent Carbon Capture and Biocementation through the Carbonic Anhydrase (CA) Activity of Microorganisms -a Review and Outlook

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