Chloride Diffusion Performance of Basalt/Polypropylene Fiber Reinforced Concrete in Marine Environment

被引：0

作者：

Su L. ^{[1
]}

Niu D. ^{[1
,2
]}

Huang D. ^{[1
]}

Fu Q. ^{[1
,2
]}

机构：

[1] School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an

[2] State Key Laboratory of Green Building in Western China, Xi'an University of Architecture and Technology, Xi'an

来源：

Jianzhu Cailiao Xuebao/Journal of Building Materials | 2022年 / 25卷 / 01期

关键词：

Basalt fiber; Chloride diffusion performance; Fiber reinforced concrete; Polypropylene fiber; Pore structure fractal dimension;

D O I：

10.3969/j.issn.1007-9629.2022.01.007

中图分类号：

学科分类号：

摘要：

The chloride diffusion performance of basalt/polypropylene fiber reinforced concrete (BPFRC) was studied by using natural immersion method to simulate the marine underwater area. The chloride content in BPFRC under different exposure time was measured by solid‑liquid extraction and potentiometric method, and the effects of fiber type, its content and hybrid form on chloride content profile, surface chloride content (Cs) and chloride diffusion coefficient were investigated. In addition, the pore size distribution of BPFRC was measured using Rapid Air 457, and the fractal dimension of pore structure was calculated. The results show that the chloride content in BPFRC increases with increasing exposure time. When the fiber volume fraction is 0.10%, the effect of basalt fiber on reducing chloride content in concrete is greater than that of polypropylene fiber, and an appropriate amount of hybrid fiber can reduce the chloride content in concrete. The excessive hybrid fiber increases the chloride content at different depths in concrete. The Cs of BPFRC increases gradually with increasing exposure time, and the relationship between Cs and exposure time is a power function. The pore structure of BPFRC shows obvious fractal characteristics, and the fractal dimension ranges from 2.301 to 2.446. The fractal dimension has a strong positive correlation with chloride diffusion coefficient. © 2022, Editorial Department of Journal of Building Materials. All right reserved.

引用

页码：44 / 53

页数：9

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