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Factors affecting the self-healing performance of bacteria-based cementitious composites: A review

2023; Elsevier BV; Volume: 384; Linguagem: Inglês

10.1016/j.conbuildmat.2023.131271

1879-0526

Muhammad Basit Ehsan Khan, Daniel Dias‐da‐Costa, Luming Shen,

Synthetic Organic Chemistry Methods

The development of micro-cracks in concrete is inevitable, and depending upon the external conditions, these cracks can lead to the deterioration of concrete by the ingress of harmful compounds. Bacteria-based healing has provided promising results for the autonomous sealing of cracks. This paper reviews factors that can significantly impact the self-healing performance of bacteria-based cementitious composites. These factors are divided into primary factors involving the selection of fundamental constituents of bacteria-based cementitious composites such as bacteria, nutrient and carrier compounds. Moreover, a few novel factors such as crack orientation, loading conditions, and exposure conditions are identified as secondary contributing factors, highlighting their effect on the healing performance that has been often overlooked in the literature. Finally, the limitations of current studies, challenges in the practical application of bacteria-based cementitious composites and future research perspectives are outlined.