Bacteria based self healing concrete – A review

Vijay, Kunamineni; Murmu, Meena; Deo, Shirish V.

doi:10.1016/j.conbuildmat.2017.07.040

Cited by 338 publications

(147 citation statements)

References 35 publications

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“…Sporosarcina pasteurii (also named Bacillus pasteurii ), Sporosarcina ureae , Bacillus sphaericus , and Bacillus megaterium belong to this group. They have been used in a number of studies for waterproofing and improving strength and durability aspects of porous and cracked concrete, as reviewed in 2010 by De Muynck et al, in 2013 by Pacheco‐Torgal and Labrincha, Phillips et al and Van Tittelboom and De Belie, in 2014 by Sarayu et al, in 2015 by Wong, and recently in 2017 by Joshi et al, Vijay et al, Souradeep et al, Han and Xing, and exhaustively by Al‐Salloum et al, (the latter review covering 255 literature references) and several recent reports …”

Section: Self‐healing Bioconcretementioning

confidence: 99%

A Review of Self‐Healing Concrete for Damage Management of Structures

Belie

Gruyaert

Al‐Tabbaa

et al. 2018

Adv Materials Inter

489

278

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The increasing concern for safety and sustainability of structures is calling for the development of smart self-healing materials and preventive repair methods. The appearance of small cracks (<300 µm in width) in concrete is almost unavoidable, not necessarily causing a risk of collapse for the structure, but surely impairing its functionality, accelerating its degradation, and diminishing its service life and sustainability. This review provides the state-ofthe-art of recent developments of self-healing concrete, covering autogenous or intrinsic healing of traditional concrete followed by stimulated autogenous healing via use of mineral additives, crystalline admixtures or (superabsorbent) polymers, and subsequently autonomous self-healing mechanisms, i.e. via, application of micro-, macro-, or vascular encapsulated polymers, minerals, or bacteria. The (stimulated) autogenous mechanisms are generally limited to healing crack widths of about 100-150 µm. In contrast, most autonomous self-healing mechanisms can heal cracks of 300 µm, even sometimes up to more than 1 mm, and usually act faster. After explaining the basic concept for each self-healing technique, the most recent advances are collected, explaining the progress and current limitations, to provide insights toward the future developments. This review addresses the research needs required to remove hindrances that limit market penetration of self-healing concrete technologies.

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Section: Self‐healing Bioconcretementioning

confidence: 99%

A Review of Self‐Healing Concrete for Damage Management of Structures

Belie

Gruyaert

Al‐Tabbaa

et al. 2018

Adv Materials Inter

489

278

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show abstract

“…Main Text: Microbiome research continues to demonstrate the abundance of microorganisms in various environments (1-3). An emerging focus in synthetic biology engineers microbes to integrate within specific niches in nature, artificial infrastructure and the human body (4)(5)(6)(7)(8)(9)(10)(11). Since genetic programming of bacteria enables them to sense and respond to physiological conditions in situ, this approach is poised to change existing paradigms for diagnosing and treating diseases such as inflammation (12,13), infection (14,15), and cancer (16)(17)(18).…”

mentioning

confidence: 99%

Multiplexed biosensors for precision bacteria tropism in vivo

Chien

Harimoto

Kepecs

et al. 2019

Preprint

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The engineering of microbes spurs biotechnological innovations, but requires control mechanisms to confine growth within defined environments for translation. Here we engineer bacterial growth tropism to sense and grow in response to specified oxygen, pH, and lactate signatures. Coupling biosensors to drive essential gene expression reveals engineered bacterial localization within upper or lower gastrointestinal tract. Multiplexing biosensors in an AND logicgate architecture reduced bacterial off-target colonization in vivo.

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“…Limestone, or calcium carbonate, is a concrete compatible material that is perfectly suitable for sealing (waterproofing) of cracks in concrete. Several research groups worldwide have developed bacteria-based healing agents to enhance the self-healing capacity of cement pasts, mortars and concrete [7][8][9][10][11][12]. Pioneering and lab-based research by the Delft research group has shown that lactate-based organic compounds like calcium lactate and lactide-polymers) are suitable carbon sources for the bacteria and that these compounds are furthermore concrete compatible in the sense that they as additive, within limits, do not negatively affect strength development of concrete [7, 8 13,14].…”

Section: Autonomous Crack Repair By Limestoneforming Bacteriamentioning

confidence: 99%

Bacteria-based self-healing concrete: evaluation of full scale demonstrator projects

Mors¹,

Jonkers

2020

RILEM Tech Lett

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Bacteria-based self-healing concrete is an innovative concrete that contains a self-healing agent that provides the material with enhanced autonomous crack-sealing performance. A specific type of this concrete, based on a healing agent composed of bacterial spores and lactate as carbon source, has been developed and applied by the Delft University of Technology for over ten years. Under laboratory conditions it was proven that, depending on the dosage of healing agent, self-healing of cracks up to 0.8 mm widths occurs. As such the material potentially allows reduction of steel reinforcement used for crack width limitation in watertight constructions. Application of self-healing concrete would therefore not only result in a reduction of costs but also in improvement of environmental performance (lower CO2 footprint) and ease of in situ casting due to reduction of use of steel in waterproof applications. However, according to the EN 1990 Eurocode (Basis of structural design), customary application of a novel type of concrete must be preceded by full scale demonstrators proving evidence for safe and functional performance. In this contribution we portray full scale application of bacteria-based self-healing agent as developed by the Delft research group in two repair mortar-and in two concrete construction demonstrator projects. These demonstrator projects show that addition of the bacteria-based self-healing agent to the concrete mix is safe as no negative side effects on construction performance was observed. However, it also proved difficult to find evidence for increased crack-healing performance as cracking in the demonstrator constructions hardly occurred. In further full scale demonstrators we therefore plan to drastically reduce amount of crack width-restraining reinforcement to show crackhealing capacity and potential to save on use of reinforcement steel in watertight concrete constructions.

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Bacteria based self healing concrete – A review

Cited by 338 publications

References 35 publications

A Review of Self‐Healing Concrete for Damage Management of Structures

A Review of Self‐Healing Concrete for Damage Management of Structures

Multiplexed biosensors for precision bacteria tropism in vivo

Bacteria-based self-healing concrete: evaluation of full scale demonstrator projects

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