Screening of bacteria and concrete compatible protection materials

Erşan, Yusuf Çağatay; Silva, Filipe Bravo da; Boon, Nico; Verstraete, Willy; Belie, Nele De

doi:10.1016/j.conbuildmat.2015.04.027

Cited by 194 publications

(70 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Under oxygen limited conditions, denitrifiers can use nitrate (NO 3 − ) as an alternative electron acceptor for oxidation of organic carbon and generate CO 3 2− and HCO 3 − ions, which are necessary for CaCO 3 precipitation (Equation ). Although precipitation yields are generally lower than for the ureolytic pathway, a CaCO 3 precipitation of 7 g CaCO 3 g −1 NO 3 –N per day could be achieved by Diaphorobacter nitroreducens . Furthermore, the resilience of D. nitroreducens enabled repetitive CaCO 3 precipitation with a constant precipitation rate of 0.72–1.2 g CaCO 3 L −1 d −1

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

…”

Section: Self‐healing Bioconcretementioning

confidence: 99%

“…The results indicated that although diatomaceous earth provided protection for NO 3 − reducing vegetative strains, it significantly decreased the setting time when combined with the respective nutrients, Ca(HCOO) 2 and Ca(NO 3 ) 2 , necessary for self‐healing. Therefore, diatomaceous earth was suggested not to be used as a protective carrier for denitrifying microorganisms in the development of self‐healing concrete, while it was experimentally proven to be useful for immobilization of ureolytic bacteria …”

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

View full text Add to dashboard Cite

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.

show abstract

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

…”

Section: Self‐healing Bioconcretementioning

confidence: 99%

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

Self Cite

489

278

View full text Add to dashboard Cite

show abstract

“…The hydrogels have the double benefit of protecting the bacterial spores and of acting as water reservoir for spores germination and bacterial activity when cracking occurs. Recently, self-protected non-axenic mixed cultures have been tested [43]: Cyclic EnRiched Ureolytic Powder (CERUP), and Activated Compact Denitrifying Core (ACDC). CERUP is a ureolytic community protected by its high salt content and obtained from the further processing of side streams from vegetable industry.…”

Section: +mentioning

confidence: 99%

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

Belie

2016

RILEM Tech Lett

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…Successful repetitive CaCO 3 precipitation could be achieved by both strains which can be beneficial for repetitive healing of same crack in case of necessity. Additionally, we previously revealed that P. aeruginosa and D. nitroreducens are concrete compatible and can survive alkaline pH of concrete matrix by the aid of protective carriers [16,33]. Besides, they are also different from the reported bacterial agents (B. sphaericus, Bacillus cohnii) in terms of their ability to perform and precipitate CaCO 3 in the absence of O 2 and trace elements which is most likely the case in concrete cracks.…”

Section: Crack Repair In Concretementioning

confidence: 97%