Dynamic Mechanical Properties of Modified Polypropylene Fiber-reinforced High-strength Coral Concrete Under Impact Load

被引：0

作者：

Cheng Y. ^{[1
]}

Ma L. ^{[2
]}

Wang L. ^{[3
]}

Geng H. ^{[2
]}

Gao K. ^{[4
]}

Tan Y. ^{[2
]}

机构：

[1] School of Civil Engineering, Hunan University of Science and Technology, Hunan, Xiangtan

[2] State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, Army Engineering University of PLA, Nanjing

[3] School of Civil Engineering and Architecture Engineering, Guilin University of Technology, Guangxi, Guilin

[4] Unit 92656 of PLA, Hainan, Sanya

来源：

Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 05期

关键词：

dynamic compressive strength; energy dissipation; high-strength coral concrete; modified polypropylene fiber; toughness index;

D O I：

10.11896/cldb.23070191

中图分类号：

学科分类号：

摘要：

The impact compression test of modified polypropylene fiber-reinforced high-strength coral concrete was performed by using a 100 mm split Hopkinson pressure bar device, and the dynamic compression strength, deformation characteristics and energy dissipation of modified polypropylene fiber-reinforced high strength coral concrete samples with different fiber dosages were analyzed. The results show that the dynamic compressive strength, fracture state and toughness index of modified polypropylene fiber-reinforced high-strength coral concrete with different fiber dosages have obvious strain rate effect. With the increase of the fiber dosage, the damage degree of modified polypropylene fiber-reinforced high-strength coral concrete gradually decreases, and the peak strain, toughness index and energy dissipation gradually increase. In conclusion, modified polypropylene fiber can effectively enhance toughness and reduce brittle failure characteristics of coral concrete. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.

引用

共 22 条

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