Enhancing concrete self-healing capabilities of Bacillus sphaericus spores through the encapsulation in biopolymeric microcapsules
Issued Date
2024-01-01
Resource Type
ISSN
21650373
eISSN
21650381
Scopus ID
2-s2.0-85204224957
Journal Title
Journal of Sustainable Cement-Based Materials
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Sustainable Cement-Based Materials (2024)
Suggested Citation
Chuenchom C., Intarasoontron J., Sorasitthiyanukarn F.N., Chindasiriphan P., Jongvivatsakul P., Thaiboonrod S., Likitlersuang S., Pungrasmi W., Rojsitthisak P. Enhancing concrete self-healing capabilities of Bacillus sphaericus spores through the encapsulation in biopolymeric microcapsules. Journal of Sustainable Cement-Based Materials (2024). doi:10.1080/21650373.2024.2401935 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/101339
Title
Enhancing concrete self-healing capabilities of Bacillus sphaericus spores through the encapsulation in biopolymeric microcapsules
Corresponding Author(s)
Other Contributor(s)
Abstract
This study examined the encapsulation of Bacillus sphaericus LMG 22257 spores in biopolymeric microcapsules (MCs) for use in cement mortar, with a focus on enhancing self-healing properties. Biopolymers, including alginate (ALG), chitosan (CTS), carboxymethyl cellulose (CMC), and ALG/CMC blends at various ratios, were employed to fabricate the MCs through ionotropic gelation and freeze–drying. The physicochemical properties of MCs, including size, morphology, and swelling behavior under simulated concrete conditions, were assessed. Among these, ALG/CMC-MCs exhibited superior characteristics and demonstrated the highest urea hydrolysis activity when incorporated into the mortar, indicating optimal spore protection. Despite an initial decrease in compressive strength, the ALG/CMC blend with an ALG:CMC mass ratio of 6:4 achieved a crack healing efficiency of 96.7% over 28 days under cyclic wet-dry conditions. These findings highlight the potential of biopolymer encapsulation for embedding functional microorganisms in construction materials, contributing to a more durable and sustainable infrastructure.