Application of Microbial Induced Calcium Carbonate Precipitation in Concrete Repairment

• Main Authors: Pang-Hsu Tai, 戴邦旭
• Other Authors: 陳豪吉
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/43089414975342193725

博士 === 國立中興大學 === 土木工程學系所 === 105 === The research focus on using Microbial induce carbonate precipitation (Microbial Induced Calcium Carbonate Precipitation, MICP) to repair the microcrack in concrete. In this research we tried to use Bacillus pasteurii for the repairmen of the microcrack in concrete. The results of serial tests prove that the higher the concentration of the bacterial broth, the greater the amount of calcium carbonate precipitate was induced, while using Bacillus pasteurii broth for concrete crack rehabilitation. The flexural strengths of the repaired concrete test samples were the greatest at 100% bacterial concentration. Compared to the control group (bacterial concentration of 0%), the flexural strength had increased by 32.58% for 1-mm crack samples and 51.01% for 2-mm crack samples, and the compression strength had increased by 28.58% and 23.85%, respectively. The tests all confirm that the using bacteria in concrete crack rehabilitation can increase the flexural and compression strength of the repaired concrete due to Microbial induce carbonate precipitation (MICP).