Development of a novel compressed tablet-based bacterial agent for self-healing cementitious material
- Authors
- Son, Yongjun; Min, Jihyeon; Jang, Indong; Yi, Chongku; Park, Woojun
- Issue Date
- 5월-2022
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Bio-concrete; Agricultural by-product; Sporulation; Encapsulation; Compression-type; Tablet
- Citation
- CEMENT & CONCRETE COMPOSITES, v.129
- Indexed
- SCIE
SCOPUS
- Journal Title
- CEMENT & CONCRETE COMPOSITES
- Volume
- 129
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/141752
- DOI
- 10.1016/j.cemconcomp.2022.104514
- ISSN
- 0958-9465
- Abstract
- A novel bacterial carrier consisting of microcrystalline cellulose (MCC) tablets was developed to encapsulate spores and has 3.0 +/- 0.5 x 10(11) spores per dried gram, which could improve the self-healing efficiency of bacterial agents. The alkaline-resistant and spore-forming bacteria Lysinibacillus boronitolerans YS11 and Bacillus miscanthi AK13 could fill microcracks with precipitated calcium carbonate in harsh cement conditions. The MICP-capable bacteria in the tablets cured the microcracks within 7 days. The calcium carbonate on the cracks was identified via scanning electron microscopy and X-ray diffractometry, validating the MICP performance and bacterial viability. Constituting only 3% of the cement mass, the MCC-tablet allowed repairing of micro-cracks. The water permeability of mortar specimens mixed with MCC tablets steadily reduced with increasing curing ages, with crack repair rates of up to 91.1% within 28 days. Our study proved that the MCC tablets developed herein are effective carriers of bacterial spores and could thus be used for the development of self-healing cementitious material.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
- College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.