Materials Reports  2020, Vol. 34 Issue (Z2): 212-216 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| 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
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1 School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
2 Research Institute of Green Construction Materials, Southeast University, Nanjing 211189, China |
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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.
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Published: 08 January 2021
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| About author:: Kangjie Zhu is majoring in materials science and engineering in Southeast University since September 2018.He is focusing on the research of microbial self-healing concrete.Chunxiang Qian,professor of Southeast University and director of Green Building Materials Research Institute of Southeast University,is mainly engaged in the research of high performance concrete and microbial intelligent concrete,microbial cement and other low-carbon cementitious materials,green energy-saving building materials. |
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