Durable repair of aged infrastructures using trapping mechanism of Engineered Cementitious Composites
Durable repair of aged infrastructures using trapping mechanism of Engineered Cementitious Composites
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DOI：
10.1016/s0958-9465(97)00026-7
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发表时间：
1997-08-01
影响因子：
10.5
通讯作者：
Li, VC
中科院分区：
文献类型：
--
作者：
Lim, YM;Li, VC
本文介绍了界面裂缝捕获的概念，并在一个典型的修补混凝土系统中通过实验验证了该机制的可行性。作为修复材料的微结构定制工程水泥基复合材料(ECC)缝纫被发现在捕获界面裂纹方面最有效，从而防止了修复系统中的典型失效模式，如剥落或分层。结果表明，在相同的几何形状和加载条件下，ECC修补体系比混凝土控制体系和典型的纤维混凝土修补材料具有更强的强度、更好的延性、更大的吸能能力和更好的裂缝宽度控制能力。诱捕机制和ECC修复材料的结合为延长修复混凝土结构的使用寿命提供了一种新的方法。(C)1997爱思唯尔科学有限公司。保留所有权利。
This paper introduces the concept of interface crack trapping and demonstrates experimentally the feasibility of this mechanism in a representative repaired concrete system. A microstructurally tailored Engineered Cementitious Composite (ECC) sewing as the repair material was found to be most effective in trapping interface cracks such that typical failure modes in repaired systems, such as spalling or delamination, were prevented. It is shown that, for the same geometry and loading conditions, the ECC repair system is stronger more ductile, more energy absorbing, and shows better crack width control in comparison with controlled systems with concrete or a typical fiber-reinforced concrete repair material. The trapping mechanism and the ECC repair material together represent a novel means to extend the service life of rehabilitated concrete structures. (C) 1997 Elsevier Science Ltd. All rights reserved.