Mechanical Properties and Acoustic Emission Response of PVA Fiber Reinforced Concrete Under Thermo-mechanical Coupling

被引：0

作者：

Liu X. ^{[1
,2
]}

Yang D. ^{[1
,2
]}

Liu L. ^{[3
]}

Lyu J. ^{[1
,2
]}

机构：

[1] College of Civil Science and Engineering, Yangzhou University, Yangzhou

[2] Research Institute of Green Building Materials, Yangzhou University, Yangzhou

[3] Nanjing Academy of Urban Planning & Design Co., Ltd., Nanjing

来源：

Cailiao Daobao/Materials Review | 2018年 / 32卷 / 09期

关键词：

Acoustic emission; Mechanical properties; PVA fiber reinforced concrete; Thermo-mechanical coupling; Tracking monitoring;

D O I：

10.11896/j.issn.1005-023X.2018.18.007

中图分类号：

学科分类号：

摘要：

The reference concrete and PVA fiber reinforced concrete were tested under thermo-mechanical coupling, using the MTS electro-hydraulic servo material testing system and its supporting high temperature furnace. Simultaneously, acoustic emission technique was adopted to monitor the whole test process. The influence of PVA fiber on mechanical properties and acoustic emission characteristics of concrete under the thermo-mechanical coupling were investigated. The results indicate that the compression damage of concrete is not instantaneous, and it is resulted from the closure, opening, development, collection of internal micro-cracks, and larger macro-crack formed by final connection of micro-cracks.400℃ is the turning point of the strength of PVA fiber reinforced concrete. The PVA fiber reinforced concrete presents higher peak strength residual ratio than reference concrete under corresponding temperature range. The incorporation of fiber can retard the strength degradation and improved the ductility of the concrete. Moreover, the frequency and intensity of acoustic emission signal, and the energy cumulative count of PVA fiber reinforced concrete are all higher than that of reference concrete, which illustrate that the addition of PVA fiber can enhance the ability of concrete to resist damage at high temperature. © 2018, Materials Review Magazine. All right reserved.

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页码：3135 / 3141

页数：6

共 17 条

[1] Yuan C., Zhao J., Damage mechanism of polypropylene fiber reinforced concrete exposed to high temperature, Journal of Materials Science & Engineering, 35, 1, (2017)
[2] Yang J., Peng G., Effect of fiber on residual strength and explosive spalling behavior of ultra-high-performance concrete exposed to high temperature, Acta Materiae Compositae Sinica, 33, 12, (2016)
[3] Hong Y., Research on the properties of modified glass fiber and polypropylene fiber reinforced concrete after high temperature, (2015)
[4] Li M., Experimental study on the mechanical and durability properties of fiber reinforced concrete after high temperature, (2014)
[5] Xiao J., Falkner H., On residual strength of high-performance concrete with and without polypropylene fibres at elevated temperatures, Fire Safety Journal, 41, 2, (2006)
[6] Lau A., Anson M., Effect of high temperatures on high performance steel fibre reinforced concrete, Cement and Concrete Research, 36, 9, (2006)
[7] Peng G., Yang W., Zhao J., Et al., Explosive spalling and residual mechanical properties of fiber-toughened high-performance concrete subjected to high temperatures, Cement and Concrete Research, 36, 4, (2006)
[8] Poon C.S., Shui Z.H., Lam L., Compressive behavior of fiber reinforced high-performance concrete subjected to elevated temperatures, Cement and Concrete Research, 34, 12, (2004)
[9] Harun T., Statistical analysis for mechanical properties of polypropylene fiber reinforced lightweight concrete containing silica fume exposed to high temperature, Materials & Design, 30, 8, (2009)
[10] Wu G., Zhai S., Sun H., Et al., Experimental study of acoustic emission of salt rock under high temperature, Chinese Journal of Rock Mechanics and Engineering, 33, 6, (2014)

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