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Use of Methylcellulose-Based Pellet to Enhance the Bacterial Self-Healing of Cement Composite

Authors
Jang, IndongSon, DasomSon, YongjunMin, JihyeonYi, Chongku
Issue Date
10월-2021
Publisher
MDPI
Keywords
bacteria; methylcellulose; self-healing concrete
Citation
MATERIALS, v.14, no.20
Indexed
SCIE
SCOPUS
Journal Title
MATERIALS
Volume
14
Number
20
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/136171
DOI
10.3390/ma14206113
ISSN
1996-1944
Abstract
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.</p>
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공과대학 (건축사회환경공학부)
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