Effect of the Size and Dosage of Microcapsule Healing Agent on the Release Rate of Healing Agent in Microbial Self-healing Concrete
ZHU Kangjie1,2, QIAN Chunxiang1,2, LI Min1,2, SU Yilin1,2
1 School of Materials Science and Engineering, Southeast University, Nanjing 211189, China 2 Research Institute of Green Construction Materials, Southeast University, Nanjing 211189, China
Abstract: In the microbial self-healing concrete, the microcapsule healing agent made by wrapping microbe with protective material can effectively reduce the death rate of microbe in the process of concrete mixing, molding and hydration. The size and dosage of microcapsule healing agent will affect the release rate of the healing agent. In this paper, the release volume of the healing agent on cross-section and the unit cost release volume of the microcapsule healing agent under different size and dosage were studied, and the experiment was simulated by MATLAB software. The results showed that the release volume of the healing agent on cross-section was almost the same for the three sizes of microcapsules at 1%, and the unit cost release volume of 2.8—3.35 mm microcapsule healing agent was lower than that of the other two sizes of microcapsules. At 3% and 5% dosage, the release volume of the healing agent on cross-section and the unit cost release volume of 3.35—4.0 mm microcapsule is higher than that of 2.8—3.35 mm and 4.0—4.75 mm microcapsule. The experimental results of the three kinds of microcapsule healing agent were basically consistent with the simulation results at 1% dosage; at 3% and 5% dosage, the experimental results of 2.8—3.35 mm microcapsule hea-ling agent were significantly different from the simulation results, and the experimental results of 3.35—4.0 mm and 4.0—4.75 mm microcapsule healing agent were basically consistent with the simulation results.
朱康杰, 钱春香, 李敏, 苏依林. 微生物自修复混凝土中微胶囊修复剂尺寸及掺量对修复剂释放率的影响[J]. 材料导报, 2020, 34(Z2): 212-216.
ZHU Kangjie, QIAN Chunxiang, LI Min, SU Yilin. Effect of the Size and Dosage of Microcapsule Healing Agent on the Release Rate of Healing Agent in Microbial Self-healing Concrete. Materials Reports, 2020, 34(Z2): 212-216.