Mineralization Reaction of Bacteria in Cement Materials

DOI

10.2991/iceep-18.2018.74How to use a DOI?

Keywords

Bacillus pasteurii bacteria, Microbial induced calcium carbonate precipitation (MICP), Strength of mortar

Abstract

This paper examines how feasible it is to utilize microbial induced calcium carbonate precipitation (MICP) occasioned by Bacillus pasteurii (B. pasteurii) to fill pores and cracks within mortar and thus increase the strength and consequent durability of mortar. In this study, different mortars were prepared with a fixed water-cement ratio of 0.4 and addition of the B. pasteurii bacteria, urea and various contents of calcium nitrate, and their 3, 7, 14 and 28-day compressive strengths were measured for comparative analysis. The test results showed that the strengths of the mortars indeed significantly increased due to the effect of MICP. The results preliminarily prove the effect of MICP that fills pores in the mortars and thus increases their strengths; and also demonstrate that the bacteria can have the reaction of MICP using the calcium hydroxide generated from cement hydration in the mortars as a calcium source.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Chung-Hao Wu
AU  - Pang-Hsu Tai
AU  - How-Ji Chen
PY  - 2018/09
DA  - 2018/09
TI  - Mineralization Reaction of Bacteria in Cement Materials
BT  - Proceedings of the 2018 7th International Conference on Energy and Environmental Protection (ICEEP 2018)
PB  - Atlantis Press
SP  - 437
EP  - 440
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceep-18.2018.74
DO  - 10.2991/iceep-18.2018.74
ID  - Wu2018/09
ER  -