TY - JOUR
T1 - Use of methylcellulose-based pellet to enhance the bacterial self-healing of cement composite
AU - Jang, Indong
AU - Son, Dasom
AU - Son, Yongjun
AU - Min, Jihyeon
AU - Yi, Chongku
N1 - 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.
PY - 2021/10/1
Y1 - 2021/10/1
N2 - 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.
AB - 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.
KW - Bacteria
KW - Methylcellulose
KW - Self-healing concrete
UR - http://www.scopus.com/inward/record.url?scp=85117566776&partnerID=8YFLogxK
U2 - 10.3390/ma14206113
DO - 10.3390/ma14206113
M3 - Article
AN - SCOPUS:85117566776
VL - 14
JO - Materials
JF - Materials
SN - 1996-1944
IS - 20
M1 - 6113
ER -