摘要
ECC是Engineered Cementitious Composites的简称,是一种具有超强韧性的乱向分布短纤维增强水泥基复合材料。不同于普通的纤维增强混凝土(FRC),ECC是一种经细观力学设计的先进材料,具有应变-硬化特性,在纤维体积掺量小于2%的情况下,其极限拉应变通常在3%～7%的范围内。ECC具有多缝稳态开裂的特点,在安全性、耐久性、适用性等方面有着优异的性能,可以很好地解决传统混凝土由于易脆性、弱拉伸性而导致的种种缺陷,在水泥基制品开发、桥梁道路施工、结构加固补强等领域有着广阔的应用前景。综述了ECC目前在国际上的研究进展和工程应用情况。
Engineered Cementitious Composite(ECC)is a new kind of random short fiber reinforced cementitious composite with ultra high ductility.Unlike common FRC,ECC is developed by optimizing the microstructure of the composite which exhibits tensile strain-hardening behavior with strain capacity in the range of 3%-7%,yet the fiber content is typically 2% by volume or less.Due to the characteristic multiple cracking,ECC has lots of advantages on durability,safety,and sustainability,which can ravel out the limitation of concrete for its brittle behavior and low ductility,which are valuable for cementitious composites produce,roads and bridges construction and rehabilitation of old structures.The advances of current researches and the engineering applications of ECC are described.
出处
《建筑结构》
CSCD
北大核心
2007年第S1期378-382,共5页
Building Structure
关键词
ECC
韧性
应变-硬化
工程应用
engineered cementitious composites
ductility
strain-hardening
engineering application
