Self-healing Action of Permeable Crystalline Coating on Pores and Cracks in Cement-based Materials  

作　　者：王桂明 余剑英 

机构地区：[1]School of Materials Science and Engineering,Wuhan University of Technology, Wuhan 430070,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2005年第1期89-91,97,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Scientific and Technological Project of Hubei Province(2004BCS005)

摘　　要：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.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.

关 键 词：cement-based materials SELF-HEALING IMPERMEABILITY CRYSTALLINE 

分 类 号：TG174[金属学及工艺—金属表面处理]