Use of methylcellulose-based pellet to enhance the bacterial self-healing of cement composite

Indong Jang, Dasom Son, Yongjun Son, Jihyeon Min, Chongku Yi

Research output: Contribution to journalArticlepeer-review


In this study, a new type of bacterial carrier using methylcellulose was presented, and its applicability to self-healing concrete has been explored. Methylcellulose, the main component of a 2 mm pellet-shaped carrier, can remain stable in alkaline environments and expand in neutral or acidic environments. These properties allow bacteria to survive in the high-alkaline and high-pressure environments of early age concrete, and the number of bacteria increases rapidly in the event of cracks, accelerating crack closure. The results show that the survival rate of bacterial spores inside the mortar was increased, and the pellet provides an enhanced biological anchor suitable for bacterial activity, bacterial growth, and mineral precipitation. Further, the results indicate an improved self-healing efficiency compared with mixing bacteria directly into the cement composite.

Original languageEnglish
Article number6113
Issue number20
Publication statusPublished - 2021 Oct 1

Bibliographical note

Funding Information:
Funding: This research was supported by the South Korean Ministry of Land, Infrastructure and Transport (21SCIP-C158976-02), and in part by National Research Foundation of Korea grant funded by the Korea government(MSIT) (NRF-2021R1A2C2009632).

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.


  • Bacteria
  • Methylcellulose
  • Self-healing concrete

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics


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