| Self-healing Action of Permeable Crystalline Coating on Pores and Cracks in Cement-based Materials |
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| 作者姓名： | WANGGuiming YUJianying |
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| 作者单位： | SchoolofMaterialsScienceandEngineering,WuhanUniversityofTechnology,Wuhan430070,China |
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| 基金项目： | Funded by the Scientific and Technological Project of Hubei Province(2004BCS005) |
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| 摘 要： | The self-healing action of a permeable crystalline coating on the porous mortar was investigated by two times impermeability test. Moreover, the self-healing mechanism of cement-based materials with the permeable crystalline coating, was studied by SEM. The results indicate that the permeable crystalline coating not only seals the pores and cracks in mortar during its curing process, but also heals the permeable pathway caused by first impermeability test or cracks produced by freeze-thaw cycles . Therefore, cement-based materials can be improved by the permeable crystalline coating for the self-healing function. SEM images prove that the self-healing function is realized by generating a great quantity of non- soluble dendritic crystalline within the pores and cracks, which prevents the penetration of water and other liquids.
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| 关 键 词： | 自恢复 粘合剂 不渗透性 结晶体 |
| 收稿时间： | 25 April 2004 |
| 修稿时间： | 7 September 2004 |
Self-healing action of permeable crystalline coating on pores and cracks in cement-based materials |
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| WANGGuiming YUJianying.Self-healing Action of Permeable Crystalline Coating on Pores and Cracks in Cement-based Materials[J].Journal of Wuhan University of Technology. Materials Science Edition,2005,20(1):89-92. |
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| Authors: | Wang Guiming Yu Jianying |
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| Affiliation: | (1) Present address: School of Materials Science and Engineering, Wuhan University of Technology, 430070 Wuhan, China |
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| Abstract: | The self-healing action of a permeable crystalline coating on the po rous mortar was investigated by two times impermeability test. Moreover, the sel f-healing mechanism of cement-based materials with the permeable crystalline c oating was studied by SEM. The results indicate that the permeable crystalline c oating not only seals the pores and cracks in mortar during its curing process, but also heals the permeable pathway caused by first impermeability test or crac ks produced by freeze-thaw cycles. Therefore, cement-based materials can be im proved by the permeable crystalline coating for the self-healing function. SEM images prove that the self-healing function is realized by generating a great q uantity of non-soluble dendritic crystalline within the pores and cracks, which prevents the penetration of water and other liquids. |
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| Keywords: | cement-based materials self-healing impermeability crystalline |
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