高延性纤维增强水泥基复合材料的微观力学设计、性能及发展趋势  

Review on Micromechanical Design, Performance and Development Tendency of Engineered Cementitious Composite

作　　者：曹明莉[1] 许玲[1] 张聪[1] 

机构地区：[1]大连理工大学土木工程学院,辽宁大连116024

出　　处：《硅酸盐学报》2015年第5期632-642,共11页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金项目(51478082)

摘　　要：高延性纤维增强水泥基复合材料(ECC)是近20年发展起来的一种新型纤维增强水泥基复合材料。ECC在受力过程中,由于开裂处纤维的桥联作用以及纤维与基体间传递应力时裂缝能够稳定扩展,使得ECC表现出明显的多缝开裂特性和应变硬化行为。因此,ECC相对于传统的纤维增强水泥基复合材料具有更好的力学性能和耐久性。本文对ECC的微观力学设计理论、基本力学性能、耐久性以及工程应用进行了综述,介绍了4种具有特殊性能的新型ECC,最后就ECC所存在的材料选取、制备工艺和测试方法等方面的不足进行了评述和展望。Engineered cementitious composite(ECC) is a kind of fiber reinforced cementitious composite developed in recent twenty years. During the loading process, ECC shows a multiple cracking pattern and a strain-hardening behavior. These phenomena are due to the fiber bridging where crack initiates and the flat crack propagation when stresses transfer between fiber and matrix. Therefore, compared to conventional fiber reinforced cementitious composite, ECC has better mechanical properties and durability. The micromechanical design theory, mechanical properties, durability and engineering application of ECC were reviewed. Four kinds of neotype ECC with special properties were introduced. In addition, some comments and research prospects for the shortcomings of ECC in terms of material selecting, preparation technology and testing methods were also given.

关 键 词：高延性纤维增强水泥基复合材料 微观力学 应变硬化 力学性能 耐久性 

分 类 号：TU528[建筑科学—建筑技术科学]