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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국계산역학회 Computers and Concrete, An International Journal Computers and Concrete, An International Journal Vol.19 No.4
- 발행연도
- 2017.1
- 수록면
- 413 - 417 (5page)
이용수
초록· 키워드
오류제보하기
Concrete is a material popularly used in construction. Due to the load-bearing and external environmental factors during utilization or manufacturing, its surface is prone to flaws, such as crack and leak. To repair these superficial defects and ultimately and avoid the deterioration of the concrete’s durability, numerous concrete surface protective coatings and crack repair products have been developed. Currently, studies are endeavoring to exploit the mineralization property of microbial strains for repairing concrete cracks be the repairing material for crack rehabilitation. This research aims to use bacteria, specifically B. pasteurii, in crack rehabilitation to enhance the flexural and compression strength of the repaired concrete. Serial tests at various bacterial concentrations and the same Urea-CaCl2 medium concentration of 70% for crack rehabilitation were executed. The results prove that the higher the concentration of the bacterial broth, the greater the amount of calcium carbonate precipitate was induced, while using B. pasteurii broth was for crack rehabilitation. The flexural and compression 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. From the SEM and XRD test results, a greater quantity of rectangular and polygonal crystals was also found in samples with high bacterial concentrations. These tests all confirm that using bacteria in crack rehabilitation can increase the flexural and compression strength of the repaired concrete.
목차
등록된 정보가 없습니다.
참고문헌 (22)
참고문헌 신청
Bachmeier, K. L. / 2002 / Urease activity in microbiologically-induced calcite precipitation / J. Biotechnol. 93(2):171~181
Bang, S. S. / 2001 / Calcite precipitation induced by polyurethane-immobilized Bacillus pasteurii / Enzym. Microb. Technol. 28(4):404~409
Chen, H. J. / 2012 / Producing synthetic lightweight aggregates from reservoir sediments / Constr. Build. Mater. 28(1):387~394
Da Silva, F. B. / 2015 / Production of non-axenic ureolytic spores for self-healing concrete applications / Constr. Build. Mater. 93:1034~1041
De Muynck, W. / 2008 / Bacterial carbonate precipitation as an alternative surface treatment for concrete / Constr. Build. Mater. 22(5):875~885
Bang, S. S. / 2001 / Calcite precipitation induced by polyurethane-immobilized Bacillus pasteurii / Enzym. Microb. Technol. 28(4):404~409
Chen, H. J. / 2012 / Producing synthetic lightweight aggregates from reservoir sediments / Constr. Build. Mater. 28(1):387~394
Da Silva, F. B. / 2015 / Production of non-axenic ureolytic spores for self-healing concrete applications / Constr. Build. Mater. 93:1034~1041
De Muynck, W. / 2008 / Bacterial carbonate precipitation as an alternative surface treatment for concrete / Constr. Build. Mater. 22(5):875~885
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