IDEAS home Printed from https://ideas.repec.org/a/gam/jsusta/v13y2021i9p4834-d543343.html
   My bibliography  Save this article

Ureolytic MICP-Based Self-Healing Mortar under Artificial Seawater Incubation

Author

Listed:
  • Xichen Sun

    (National Key Laboratory of Transient Physics, Nanjing University of Science & Technology, Nanjing 210094, China
    School of Environmental and Biological Engineering, Nanjing University of Science & Technology, Nanjing 210094, China)

  • Jie Chen

    (School of Environmental and Biological Engineering, Nanjing University of Science & Technology, Nanjing 210094, China)

  • Siyi Lu

    (School of Science, Nanjing University of Science & Technology, Nanjing 210094, China)

  • Miaomiao Liu

    (School of Environmental and Biological Engineering, Nanjing University of Science & Technology, Nanjing 210094, China)

  • Siyu Chen

    (School of Environmental and Biological Engineering, Nanjing University of Science & Technology, Nanjing 210094, China)

  • Yifei Nan

    (School of Science, Nanjing University of Science & Technology, Nanjing 210094, China)

  • Yang Wang

    (School of Environmental and Biological Engineering, Nanjing University of Science & Technology, Nanjing 210094, China)

  • Jun Feng

    (National Key Laboratory of Transient Physics, Nanjing University of Science & Technology, Nanjing 210094, China)

Abstract

Ureolytic microbial-induced calcium carbonate precipitation (MICP) is a promising green technique for addressing sustainable building concerns by promoting self-healing mortar development. This paper deals with bacteria-based self-healing mortar under artificial seawater incubation for the sake of fast crack sealing with sufficient calcium resource supply. The ureolytic MICP mechanism was explored by morphology characterization and compositional analysis. With polyvinyl alcohol fiber reinforcement, self-healing mortar beams were produced and bent to generate 0.4 mm width cracks at the bottom. The crack-sealing capacity was evaluated at an age of 7 days, 14 days, and 28 days, suggesting a 1-week and 2-week healing time for 7-day- and 14-day-old samples. However, the 28-day-old ones failed to heal the cracks completely. The precipitation crystals filling the crack gap were identified as mainly vaterite with cell imprints. Moreover, fiber surface was found to be adhered by bacterial precipitates indicating fiber–matrix interfacial bond repair.

Suggested Citation

  • Xichen Sun & Jie Chen & Siyi Lu & Miaomiao Liu & Siyu Chen & Yifei Nan & Yang Wang & Jun Feng, 2021. "Ureolytic MICP-Based Self-Healing Mortar under Artificial Seawater Incubation," Sustainability, MDPI, vol. 13(9), pages 1-11, April.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:9:p:4834-:d:543343
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2071-1050/13/9/4834/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/2071-1050/13/9/4834/
    Download Restriction: no
    ---><---

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jsusta:v:13:y:2021:i:9:p:4834-:d:543343. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.