Influence of surface treatment on basalt fiber reactive powder concrete mechanical properties and fracture characteristics

被引：0
|
作者：
Liu H.-B. [1 ]
Gao X. [1 ]
Gong Y.-F. [1 ]
Liu S.-Q. [1 ]
Li W.-J. [1 ]
机构：
[1] College of Transportation, Jilin University, Changchun
来源：
Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2021年 / 51卷 / 03期
关键词：
Acoustic emission; Architecture material; Basalt fiber; Fracture properties; Mechanical properties; Reactive powder concrete; Surface treatment;
D O I：
10.13229/j.cnki.jdxbgxb20200157
中图分类号：
学科分类号：
摘要：
Coupling agent KH-550 and hydrochloric acid are used for basalt fiber surface treatment to investigate the effect of modification conditions on the mechanical properties and working performance indexes of basalt fiber-reactive powder concrete. The optimum modification conditions were selected as follows: 0.75wt% of coupling agent, 3 mol/L of hydrochloric acid, acid etching temperature of 20℃ and etching time of 60 min. By using acoustic emission (AE) technology, the damage characteristics of basalt fiber reactive powder concrete before and after modification were compared to determine the fracture stage and fracture mode of the sample in the fracture test. The results show that in AE parameters, the accumulative AE hit, accumulative energy and amplitude are related to the damage stage of basalt fiber reactive powder concrete, Fiber modification affects the final stage of concrete loading. In addition, during the loading process, the rise angle (RA) and the average frequency (AF) have opposite trends, and their changes are related to the fracture mode. © 2021, Jilin University Press. All right reserved.
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页码：936 / 945
页数：9
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