Nitrate reducing CaCO3 precipitating bacteria survive in mortar and inhibit steel corrosion

Erşan, Yusuf Çağatay; Verbruggen, Hilke; Graeve, Iris De; Verstraete, Willy; Belie, Nele De; Boon, Nico

doi:10.1016/j.cemconres.2016.01.009

Cited by 129 publications

(58 citation statements)

References 35 publications

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“…Nitrate reduction could also lead to the production of NO 2 − which is known as a corrosion inhibitor (Equation )

2 {HCOO}^{-} + 2 {NO}_{3}^{-} + 2 {normalH}^{+} \to 2 {CO}_{2} + 2 {normalH}_{2} O + 2 {NO}_{2}^{-}

…”

Section: Self‐healing Bioconcretementioning

confidence: 99%

“…Therefore, biological NO 3 − reduction has significant potential to inhibit corrosion in concrete environment. It was shown that vegetative axenic nitrate reducing and CaCO 3 precipitating bacteria, P. aeruginosa and D. nitroreducens , could survive mortar environment if protected by either diatomaceous earth, expanded clay, or granular activated carbon . The tested cultures tended to accumulate nitrite at alkaline pH conditions.…”

Section: Self‐healing Bioconcretementioning

confidence: 99%

“…The tested cultures tended to accumulate nitrite at alkaline pH conditions. Microbial‐produced NO 2 − could inhibit steel corrosion up to a certain extent in corrosive electrolyte solution (0.05 m Cl − , pH 9) and the controlling parameter was the [NO 2 − ]:[Cl − ] ratio . Pitting corrosion occurred around −100 mV when the [NO 2 − ]:[Cl − ] ratio was below 1.…”

Section: Self‐healing Bioconcretementioning

confidence: 99%

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

Belie

Gruyaert

Al‐Tabbaa

et al. 2018

Adv Materials Inter

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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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“…Nitrate reduction could also lead to the production of NO 2 − which is known as a corrosion inhibitor (Equation )

2 {HCOO}^{-} + 2 {NO}_{3}^{-} + 2 {normalH}^{+} \to 2 {CO}_{2} + 2 {normalH}_{2} O + 2 {NO}_{2}^{-}

…”

Section: Self‐healing Bioconcretementioning

confidence: 99%

Section: Self‐healing Bioconcretementioning

confidence: 99%

Section: Self‐healing Bioconcretementioning

confidence: 99%

See 1 more Smart Citation

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

Belie

Gruyaert

Al‐Tabbaa

et al. 2018

Adv Materials Inter

Self Cite

489

278

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“…It will therefore protect the steel surface from corrosive substances during the healing period. It was shown that the non-axenic culture named "activated compact denitrifying core" (ACDC) induced passivation of steel in corrosive electrolyte solution (0.05 M NaCl) by producing 57 mM NO 2 -in 1 week [50]. Recently, accelerated corrosion experiments have been carried out on cracked (300 µm crack width) mortar specimens with an embedded steel rod subjected to 0.4 M chloride solution to mimic chloride concentrations in seawater (Fig.…”

Section: Bacterial Self-healing To Increase Concrete 7 Durability Andmentioning

confidence: 99%

Application of bacteria in concrete: a critical evaluation of the current status

Belie

2016

RILEM Tech Lett

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Microbially induced carbonate precipitation has been tested over more than a decade as a technique to enhance concrete properties. Mainly bacteria following the pathways of urea decomposition, oxidation of organic acids, or nitrate reduction have been studied for this purpose. For bacteria mixed into fresh concrete, it is difficult to prove that they actively contribute to calcium carbonate precipitation and the effects on concrete strength are variable. Application of bacteria for surface consolidation has been shown to reduce water absorption and increase durability. Microbial self-healing of cracks in concrete shows promising results at the laboratory scale. Especially the use of self-protected mixed cultures opens perspectives for practical application. However, their self-healing efficiency needs to be further proven in larger concrete elements, and under non-ideal conditions. The use of denitrifying cultures for concurrent self-healing and production of corrosion inhibiting nitrites is a promising new strategy.

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“…Under O 2 ‐limited conditions, no toxic by‐products can be formed. In addition, it can also produce nitrite ions, a well‐known corrosion inhibitor for rebars, according to

2 {HCOO}^{-} + 2 {NO}_{3}^{-} + 2 {normalH}^{+} \to 2 {CO}_{2} + 2 {normalH}_{2} O + 2 {NO}_{2}^{-}

…”

Section: Mechanisms Of Intrinsic Self‐healing: Guest–host Interactionsmentioning

confidence: 99%

Recent Advances in Intrinsic Self‐Healing Cementitious Materials

et al. 2018

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Self-healing is a natural phenomenon whereby living organisms respond to damage. Recently, considerable research efforts have been invested in self-healing cementitious materials that are capable of restoring structural integrity and mechanical properties after being damaged. Inspired by nature, a variety of creative approaches are explored here based on the intrinsic or extrinsic healing mechanism. Research on new intrinsic self-healing cementitious materials with biomimetic features is on the forefront of material science, which provides a promising way to construct resilient and sustainable concrete infrastructures. Here, the current advances in the development of the intrinsic healing cementitious materials are described, and a new definition of intrinsic self-healing discussed. The methods to assess the efficiency of different healing mechanisms are briefly summarized. The critical insights are emphasized to guide the future research on the development of new self-healing cementitious materials.

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Nitrate reducing CaCO3 precipitating bacteria survive in mortar and inhibit steel corrosion

Cited by 129 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

Application of bacteria in concrete: a critical evaluation of the current status

Recent Advances in Intrinsic Self‐Healing Cementitious Materials

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