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Study on Dynamic Compressive Properties of PVA-ECC

被引：0
|
作者：
Li Y. [1 ]
Zhang W. [1 ]
Liu Z. [1 ]
机构：
[1] School of Civil Engineering, Henan Polytechnic University, Jiaozuo
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2020年 / 23卷 / 03期
关键词：
Dynamic compressive property; Engineered cementitious composite; Polyvinyl alcohol; Split hopkinson pressure bar; Strain rate;
D O I：
10.3969/j.issn.1007-9629.2020.03.005
中图分类号：
学科分类号：
摘要：
The dynamic compressive properties of engineered cementitious composite(PVA-ECC) with different polyvinyl alcohol(PVA) fiber contents by volume and different matrix strength subjected to three different strain rates were studied by using a φ50 split hopkinson pressure bar(SHPB) apparatus. The results show that PVA fiber can effectively improve the impact damage degree of PVA-ECC specimen, and the higher the volume content is the better the integrity will be when the sample is damaged. With the increase of strain rate, the dynamic peak stress, peak strain and toughness of PVA-ECC increase remarkably, which shows an obvious strain rate effect. Different PVA fiber contents by volume have great influence on the dynamic compressive properties of PVA-ECC, especially on the post-peak toughness of PVA-ECC, but it has little influence on the strain rate sensitivity of PVA-ECC compressive strength. Higher strength PVA-ECC has higher dynamic peak stress, but the dynamic peak strain is similar and the post-peak toughness decreases significantly. Furthermore, the matrix strength also has little influence on the strain rate sensitivity of PVA-ECC compressive strength. © 2020, Editorial Department of Journal of Building Materials. All right reserved.
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页码：513 / 520
页数：7
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