水资源与水工程学报

文章摘要

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Journal of Water Resources and Water Engineering[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）

Author Name	Affiliation
KAN Lili¹, XU Chao¹, ZHU Jin¹, YAN Tao¹, WANG Mingzhi², CAO Hao¹	(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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