Effect of Rubber Powder on Mechanical Properties and Microstructure of Polypropylene Fiber Reinforced Concrete

被引：0

作者：

Mo J. ^{[1
]}

Zeng L. ^{[1
]}

Guo F. ^{[1
]}

Liu Y. ^{[1
]}

Xiang S. ^{[1
]}

机构：

[1] School of Urban Construction, Yangtze University, Jingzhou

来源：

Jianzhu Cailiao Xuebao/Journal of Building Materials | 2020年 / 23卷 / 05期

关键词：

Damping ratio; Mechanical property; Microstructure; Polypropylene fiber; Rubber powder;

D O I：

10.3969/j.issn.1007-9629.2020.05.031

中图分类号：

学科分类号：

摘要：

The effect of rubber powder on the mechanical properties and microstructure of polypropylene fiber concrete(PFC) was studied. Through the axial compression test and the free decay vibration test, the measured indexes of compressive strength, Poisson's ratio, elastic modulus and damping ratio were compared. The effect of rubber powder on the microstructure and interface of polypropylene fiber reinforced concrete was investigated by scanning electron microscopy(SEM). The results show that with the addition of rubber powder, the compressive strength of the cube and prism specimen decreases, and peak strain increases. The average ratio of the compressive strength of the prism to its cubic compressive strength is 0.90. The Poisson ratio is between 0.18 and 0.22 in the elastic phase. The modulus of elasticity decreases. With the incorporation of rubber powder, the damping ratio of polypropylene fiber concrete is increased, and the most significant increase is achieved when the polypropylene fiber content is 1.5%. The filling behavior of the rubber powder and its own viscoelastic behavior can improve the internal pore structure of the concrete, and improve the friction loss between the aggregate interfaces, and effectively improve the damping performance of the concrete. © 2020, Editorial Department of Journal of Building Materials. All right reserved.

引用

页码：1222 / 1229

页数：7

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