期刊
MATERIALS AND STRUCTURES
卷 52, 期 6, 页码 -出版社
SPRINGER
DOI: 10.1617/s11527-019-1410-5
关键词
Crack repair; Glucose; Calcium carbonate; Sonic time value; Unconfined compressive strength
资金
- National Natural Science Foundation of China [51578147]
- Scientific Research Foundation of Graduate School of Southeast University [YBJJ1846]
- Fundamental Research Funds for the Central Universities
- Postgraduate Research and Practice Innovation Program of Jiangsu Province [KYCX18_0107]
This study developed a novel method of glucose addition for the crack repair of concrete samples, which improved the bio-remediation efficiency. Various amounts of glucose were added to the medium at different sequence and the resulting absorbances were measured. Urea, calcium salt, and various amounts of glucose were mixed with an absorbance-fixed bacterial suspension and the resulting effect on calcium carbonate production was analyzed. Concrete specimens with irregular cracks were subjected to glucose addition for bio-remediation. Glucose addition decreased the pH, which inhibited the growth of bacteria. However, in a strong alkaline environment, this procedure was beneficial for crack repair. Informed by the bacterial growth and precipitation rates for calcium carbonate, addition of 10 g/L glucose was identified as the optimum concentration. After repair, the area recovery ratios of all samples exceeded 79%, while water penetration rates decreased significantly. The sonic time values of measurement points decreased and the strength of samples reached about 35% of the initial strength. Adding glucose to the medium during the repair improved the effect of the repair. This method can repair irregular cracks, accelerate the bio-remediation reaction, and reduce the repair time.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据