Advanced search
1 file | 3.57 MB

Application of modified-alginate encapsulated carbonate producing bacteria in concrete: a promising strategy for crack self-healing

Jianyun Wang (UGent) , Arn Mignon (UGent) , Didier Snoeck (UGent) , Virginie Wiktor, Sandra Van Vlierberghe (UGent) , Nico Boon (UGent) and Nele De Belie (UGent)
Author
Organization
Abstract
Self-healing concrete holds promising benefits to reduce the cost for concrete maintenance and repair as cracks are autonomously repaired without any human intervention. In this study, the application of a carbonate precipitating bacterium Bacillus sphaericus was explored. Regarding the harsh condition in concrete, B. sphaericus spores were first encapsulated into a modified-alginate based hydrogel (AM-H) which was proven to have a good compatibility with the bacteria and concrete regarding the influence on bacterial viability and concrete strength. Experimental results show that the spores were still viable after encapsulation. Encapsulated spores can precipitate a large amount of CaCO3 in/on the hydrogel matrix (around 70% by weight). Encapsulated B. sphaericus spores were added into mortar specimens and bacterial in situ activity was demonstrated by the oxygen consumption on the mimicked crack surface. While specimens with free spores added showed no oxygen consumption. This indicates the efficient protection of the hydrogel for spores in concrete. To conclude, the AM-H encapsulated carbonate precipitating bacteria have great potential to be used for crack self-healing in concrete applications.
Keywords
CEMENTATION, SURVIVAL, LIMESTONE, REINFORCEMENT, BIOMINERALIZATION, STRENGTH, B. sphaericus spores, Modified-alginate hydrogel, bacterial CaCO3, in situ activity, oxygen consumption, crack self-healing, CALCIUM-CARBONATE, SUPERABSORBENT POLYMERS, SOIL, PRECIPITATION

Downloads

  • Application of modified-alginate encapsulated carbonate producing bacteria.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 3.57 MB

Citation

Please use this url to cite or link to this publication:

Chicago
Wang, Jianyun, Arn Mignon, Didier Snoeck, Virginie Wiktor, Sandra Van Vlierberghe, Nico Boon, and Nele De Belie. 2015. “Application of Modified-alginate Encapsulated Carbonate Producing Bacteria in Concrete: a Promising Strategy for Crack Self-healing.” Frontiers in Microbiology 6.
APA
Wang, Jianyun, Mignon, A., Snoeck, D., Wiktor, V., Van Vlierberghe, S., Boon, N., & De Belie, N. (2015). Application of modified-alginate encapsulated carbonate producing bacteria in concrete: a promising strategy for crack self-healing. FRONTIERS IN MICROBIOLOGY, 6.
Vancouver
1.
Wang J, Mignon A, Snoeck D, Wiktor V, Van Vlierberghe S, Boon N, et al. Application of modified-alginate encapsulated carbonate producing bacteria in concrete: a promising strategy for crack self-healing. FRONTIERS IN MICROBIOLOGY. 2015;6.
MLA
Wang, Jianyun, Arn Mignon, Didier Snoeck, et al. “Application of Modified-alginate Encapsulated Carbonate Producing Bacteria in Concrete: a Promising Strategy for Crack Self-healing.” FRONTIERS IN MICROBIOLOGY 6 (2015): n. pag. Print.
@article{7095976,
  abstract     = {Self-healing concrete holds promising benefits to reduce the cost for concrete maintenance and repair as cracks are autonomously repaired without any human intervention. In this study, the application of a carbonate precipitating bacterium Bacillus sphaericus was explored. Regarding the harsh condition in concrete, B. sphaericus spores were first encapsulated into a modified-alginate based hydrogel (AM-H) which was proven to have a good compatibility with the bacteria and concrete regarding the influence on bacterial viability and concrete strength. Experimental results show that the spores were still viable after encapsulation. Encapsulated spores can precipitate a large amount of CaCO3 in/on the hydrogel matrix (around 70\% by weight). Encapsulated B. sphaericus spores were added into mortar specimens and bacterial in situ activity was demonstrated by the oxygen consumption on the mimicked crack surface. While specimens with free spores added showed no oxygen consumption. This indicates the efficient protection of the hydrogel for spores in concrete. To conclude, the AM-H encapsulated carbonate precipitating bacteria have great potential to be used for crack self-healing in concrete applications.},
  articleno    = {1088},
  author       = {Wang, Jianyun and Mignon, Arn and Snoeck, Didier and Wiktor, Virginie and Van Vlierberghe, Sandra and Boon, Nico and De Belie, Nele},
  issn         = {1664-302X},
  journal      = {FRONTIERS IN MICROBIOLOGY},
  keyword      = {CEMENTATION,SURVIVAL,LIMESTONE,REINFORCEMENT,BIOMINERALIZATION,STRENGTH,B. sphaericus spores,Modified-alginate hydrogel,bacterial CaCO3,in situ activity,oxygen consumption,crack self-healing,CALCIUM-CARBONATE,SUPERABSORBENT POLYMERS,SOIL,PRECIPITATION},
  language     = {eng},
  pages        = {14},
  title        = {Application of modified-alginate encapsulated carbonate producing bacteria in concrete: a promising strategy for crack self-healing},
  url          = {http://dx.doi.org/10.3389/fmicb.2015.01088},
  volume       = {6},
  year         = {2015},
}

Altmetric
View in Altmetric
Web of Science
Times cited: