doi:10.3850/978-981-08-7619-7_P036

ABSTRACT

Mortar or concrete incorporated microorganisms has become an important area of research for sustainableconstruction materials. This paper describes the effect of microbial induced CaCO₃ precipitation on durability of mortar. The bacterium isolated from the Manjang cave in Jeju Island was used to induce CaCO₃ precipitation. In this study, four different cell concentrations ranging from 10 to 10⁷ per ml of mixing water were added to mortar via mixing water. The effects of microbial induced CaCO₃ precipitation on durability of mortar was evaluated by comparing the compressive strengths of microbially treated specimen. The amount of microbial induced CaCO₃ precipitation in mortar according to different cell concentrations was measured by thermogravimetric analysis (TGA) and the relation between the amount of microbial induced CaCO₃ precipitation and compressive strength of mortar was analyzed.

Keywords: Biomineralization, Bacteria, CaCO₃ precipitation, Mortar.

© 2011 RPS