Dai, Jinpeng, Qi, Yuhu, Wang, Yan, Mu, Song, Yang, Kai and Liu, Tong
2026.
Impact and mechanism of multi-strain composite microbial mineralized coating on concrete impermeability.
Journal of Sustainable Cement-Based Material
15
(10)
, pp. 3577-3593.
10.1080/21650373.2026.2692654
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Abstract
This study developed eco-friendly microbial mineralized coatings to mitigate chloride ingress and water absorption in concrete. Three alkali-acclimated strains Bacillus pasteurii (B), Bacillus cohnii (K), and Clavispora lusitaniae (J) were optimally combined. The ternary coating (K:B:J = 3:2:1) achieved synergistic effects via EPS carrier from K, CaCO3 pore filling by B, and low-hydrophilicity modification by J, reducing open porosity to 4.40% and increasing water contact angle to 55.9°. The binary coating (K:B = 7:3) showed superior chloride resistance with a migration coefficient of 2.72 × 10−10 m2/s, reaching P-V impermeability grade. Microscopic analyses confirmed dense biogenic CaCO3 filled pores and strengthened interfaces. This work provides a quantitative framework for designing sustainable high-performance coatings to extend concrete service life in aggressive environments.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Engineering |
| Additional Information: | RRS applied |
| Publisher: | Taylor and Francis Group |
| ISSN: | 2165-0373 |
| Date of First Compliant Deposit: | 2 October 2026 |
| Date of Acceptance: | 16 June 2026 |
| Last Modified: | 08 Oct 2026 08:45 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/187908 |
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