Characterization of Self-healing Cracks in Cement-based Materials Based on Labled Calcium Carbonate

被引：0
|
作者：
Chen Q. [1 ,2 ,3 ]
Su Y. [1 ,2 ,3 ]
Li M. [1 ,2 ,3 ]
Qian C. [1 ,2 ,3 ]
机构：
[1] College of Materials Science and Engineering, Southeast University, Nanjing
[2] Research Institute of Green Construction Materials, Southeast University, Nanjing
[3] Key Laboratory of Microbial Technology in Building Materials Industry, Southeast University, Nanjing
来源：
Cailiao Daobao/Materials Reports | 2021年 / 35卷 / 14期
基金：
中国国家自然科学基金;
关键词：
Biological calcium carbonate; Calibration of repair products; Fracture characterization of cement-based materials; Ion doping;
D O I：
10.11896/cldb.20060298
中图分类号：
学科分类号：
摘要：
In order to characterize the crack repair depth of mocrobial self-healing cement-based materials, two methods were proposed to characterize calcium carbonate, the mineralized product of microorganisms. One method was to adsorb Cu2+ by biological calcium carbonate and form basic copper carbonate mark on its surface. Another method was to label the mineralized products by doping Eu3+ to form CaCO3:Eu3+. XRD was used to analyze biocarbonate before and after labeling in solution and cement-based materials. Fluorescence excitation and emission spectroscopy were used to analyze the calcium carbonate doped with Eu3+. X-CT was used to characterize the cement-based materials labeled by two methods. The results showed that: under the condition of 12.5 mg/mL Cu2+, 25 ℃, and 3 h, the adsorption effect of Cu2+ labeled biocarbonate was the best. Under the condition of 2% Eu3+, 45 ℃ and 48 h, the effect of labeling biocarbonate with Eu3+ was best. The evaluation results of the two methods on the repair depth were 3 mm, which were consistent with the results of thermogravimetric analysis. By adsorption of Cu2+ and doping of Eu3+, the products can be calibrated and the repair depth of cement-based materials can be characterized with good accuracy. © 2021, Materials Review Magazine. All right reserved.
引用
收藏
页码：14045 / 14051
页数：6
相关论文
共 22 条
  • [1] Wang J Y, Dewanckele J, Veerlr C., Cement and Concrete Composites, 53, (2014)
  • [2] Ruan S Q, Qiu J S, Weng Y W, Et al., Cement and Concrete Research, 115, (2019)
  • [3] Wang K, Qian C X., Construction and Building Materials, 113, (2016)
  • [4] Xu J, Wang X Z., Construction and Building Materials, 167, (2018)
  • [5] Suleiman A R, Nehdi M L., Cement and Concrete Research, 111, (2018)
  • [6] Chen H C, Qian C X, Ren L F., Journal of Southeast University (Natural Science Edition), 46, 3, (2016)
  • [7] Qian C X, Feng J H, Su Y L., Materials Report B: Research Papers, 33, 6, (2019)
  • [8] Hong S X, Liu P, Zhang J C., Cement and Concrete Composites, 100, (2019)
  • [9] Wiketor V, Jonkers H M., Cement and Concrete Composites, 33, (2011)
  • [10] Snoeck D, Dewanckele J, Cnudde V, Et al., Cement and Concrete Composites, 65, (2016)
123