水资源与水工程学报

阚黎黎，徐超，朱瑨，闫涛，王明智，曹号.不同环境对超高韧性水泥基复合材料裂缝自愈合的影响水资源与水工程学报[J].,2015,26(6):167-172

不同环境对超高韧性水泥基复合材料裂缝自愈合的影响

Effect of different environments on crack self-healing engineered cementitious composite

DOI：10.11705/j.issn.1672-643X.2015.06.031

英文关键词:engineered cementitious composite (ECC) self-healing crack resonant frequency environment

基金项目:国家自然科学基金项目（51508329）；云南省应用基础研究基金面上项目（2013FB023）；上海理工大学大学生创新创业训练计划项目（XJ2015152）

作者	单位
阚黎黎¹，徐超¹，朱瑨¹，闫涛¹，王明智²，曹号¹	(1.上海理工大学环境与建筑学院，上海 200093； 2.昆明理工大学环境科学与工程学院, 云南昆明 650093)

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中文摘要:

通过对超高韧性水泥基复合材料（ECC）预加不同程度拉伸应变产生裂缝，测定自愈合过程中的共振频率（RF），探究了干湿循环（C1）、湿热循环（C2）、水（C3）及空气（C4）等不同环境对ECC裂缝自愈合的影响，为其应用于实际工程中提供了依据。结果表明：水对裂缝的自愈合起到了至关重要的作用；不同环境中RF的增长主要发生在3~7d内；10个自愈合循环后，由裂缝自愈合导致的RF的实际增长也高达近70%；不同环境中RF增长的顺序为：C3>C1>C2>C4；不同配比相比较，HFA-ECC的RF恢复值高于M45-ECC。ECC裂缝能发生明显的自愈合，具有较好的应用前景。

英文摘要:

By the tensile test of ECC at different pre-loading, the paper measured the resonant frequency (RF) in the process of self recovery, and studied the effect of different conditioning cycles including wet/dry (C1), water/hot air (C2), water (C3) and air (C4) on crack self-healing of ECC materials,thus provided the basis for the application of practical engineering.The results show that water plays a vital role for self-healing.The increase of RF under different conditioning cycles mainly occurrs within 3 to 7 days. After 10 cycles,the actual RF recovery due to self-healing is nearly 70%. The order of RF recovery under different conditioning cycles is C3>C1>C2>C4. Compared to different ratio of ECC, HFA-ECC has higher RF recovery than that of M45-ECC. The crack of ECC can produce apparent self-healing. ECC has good application prospect.

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