Investigation of the crack healing performance in mortar using microbially induced calcium carbonate precipitation (MICP) method

By P. Jongvivatsakul, Karn Janprasit, Peem Nuaklong, W. Pungrasmi, S. Likitlersuang. Construction and Building Materials, 2019

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Abstract This study presents the feasibility of using bacterial cells to repair of the existing cracks within the cement mortar. Bacillus sphaericus (LMG 22257) has been used to produce microbially induced calcium carbonate precipitation (MICP) for crack closing. The healing agent were externally applied to the cracked mortar specimens by dropping the bacteria and urea solutions daily. After 20 days of treatment, the MICP-treated sample showed 43% higher compressive strength than that of cracked sample. In addition, it is comparable in terms of water tightness to control mortar made without artificial crack.

Subfields: Biotechnology, Environmental Engineering, Organic Chemistry

View Paper: https://www.semanticscholar.org/paper/9985600174d85739fb91abfda3eb1986032bf2e5