Basic mechanical behavior of ECC made with different types of fibers

被引：0
|
作者：
Wang W. [1 ]
Kuang Y. [1 ]
Tian J. [1 ]
Zheng Y. [1 ]
Chen Y. [2 ]
机构：
[1] School of Transportation, Southeast University, Nanjing
[2] Liaoning Datong Road Construction Co., Ltd., Shenyang
来源：
| 1600年 / Editorial Board of Journal of Basic Science and卷 / 24期
关键词：
Critical volume fraction; Ductility; Engineering cementitious composite(ECC); Mechanical behavior; Mixed amount of fiber;
D O I：
10.16058/j.issn.1005-0930.2016.01.014
中图分类号：
学科分类号：
摘要：
The basic mechanical behavior of engineering cementitious composite(ECC)made with six different types of fibers was investigated experimentally. The influences of diameter and length of fiber and type of fiber on the critical volume fraction of fiber was analyzed. The load-deflection curves at the mid-span section of four-point bending ECC specimens were measured and the failure modes and the development and distribution of cracks were observed. The test results showed that the diameter of fiber was a main factor that affected the dispersion of fiber into the cement base. The linear relationship of the diameter of fiber and the critical volume fraction was established by regression of the experimental data. The brittle failure mode occurred in ECC specimens made with carbon fiber(CF)and basalt fiber(BF); While the ECC specimens made with polyvinyl alcohol(PVA)fiber and polypropylene(PP)fiber exhibited a good ductility. The values of strain hardening index and toughness index of PVA and PP specimens were higher than those of CF and BF specimens. Several wider cracks distributed on the surfaces of PP specimens but more micro cracks were seen in the pure flexural zone of PVA specimens. © 2016, The Editorial Board of Journal of Basic Science and Engineering. All right reserved.
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页码：148 / 156
页数：8
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