Use of Methylcellulose-Based Pellet to Enhance the Bacterial Self-Healing of Cement Composite
| Autor: | Indong Jang, Jihyeon Min, Dasom Son, Yongjun Son, Chongku Yi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Technology
Composite number Bacterial growth Endospore Article Crack closure self-healing concrete Pellet methylcellulose General Materials Science Composite material bacteria Cement Microscopy QC120-168.85 biology Chemistry QH201-278.5 Engineering (General). Civil engineering (General) biology.organism_classification TK1-9971 Descriptive and experimental mechanics Electrical engineering. Electronics. Nuclear engineering TA1-2040 Mortar Bacteria |
| Zdroj: | Materials Materials, Vol 14, Iss 6113, p 6113 (2021) Volume 14 Issue 20 |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma14206113 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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