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Use of colloidal thickeners for the injection and retention of bacterial growth media to repair cracked concrete

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  • Additional Information
    • Contributors:
      Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 (LGCgE); Université d'Artois (UA)-Université de Lille-Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai); Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-JUNIA (JUNIA); Université catholique de Lille (UCL)-Université catholique de Lille (UCL); Centre for Materials and Processes (CERI MP - IMT Nord Europe); Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Nord Europe); Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT); Université de Sherbrooke (UdeS)
    • Publication Information:
      HAL CCSD
      Elsevier
    • Publication Date:
      2020
    • Collection:
      LillOA (HAL Lille Open Archive, Université de Lille)
    • Abstract:
      International audience ; This study aimed at developing a bacteria-based method to repair cracks in concrete (crack opening < 1 mm) that would be suitable for full-scale operations and economically viable. CaCO3-producing bacteria were injected into calibrated cracks with bioavailable calcium and nutrients in a suspension thickened with a combination of Welan gum and Attagel® 50. These thickeners have synergistic effects, enhancing viscosity and shear-thinning behavior. These rheology characteristics made injection without drainage possible for crack widths ranging from 150 to 800 µm. Bacterial growth and the associated CaCO3 biomineralization were enhanced in the presence of thickeners. © 2020 Elsevier Ltd
    • Relation:
      hal-03178376; https://hal.science/hal-03178376; https://hal.science/hal-03178376/document; https://hal.science/hal-03178376/file/S095006182031998X.pdf; PII: S0950-0618(20)31998-X
    • Accession Number:
      10.1016/j.conbuildmat.2020.119993
    • Online Access:
      https://doi.org/10.1016/j.conbuildmat.2020.119993
      https://hal.science/hal-03178376
      https://hal.science/hal-03178376/document
      https://hal.science/hal-03178376/file/S095006182031998X.pdf
    • Rights:
      http://creativecommons.org/licenses/by-nc/ ; info:eu-repo/semantics/OpenAccess
    • Accession Number:
      edsbas.7D175DDB