Effect of Modification and Temperature on Interfacial Properties of Textile Reinforced Concrete

被引：0
|
作者：
Zhu D. [1 ,2 ]
Ren J. [1 ]
Guo S. [1 ,2 ]
机构：
[1] College of Civil Engineering, Hunan University, Changsha
[2] Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province（Hunan University）, Changsha
来源：
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2022年 / 49卷 / 09期
基金：
中国国家自然科学基金;
关键词：
bonding; carbon fiber; interface; temperature; Textile Reinforced Concrete（TRC）;
D O I：
10.16339/j.cnki.hdxbzkb.2022103
中图分类号：
学科分类号：
摘要：
To study the effect of interface modification and temperature on the interface performance of Textile Reinforced Concrete (TRC), the textile surface with epoxy resin, silane coupling agent and nano-silica（SiO2）were treated, respectively. The scanning electron microscope, and pull-out test were conducted to study the micro-morphology and macro-mechanical properties of TRC specimens at 25 ℃, 100 ℃, and 200 ℃. The test results show that both nano-SiO2 impregnation and epoxy resin coating can significantly improve the interfacial properties between carbon fiber and the cement matrix. Nano-SiO2 particles can be immersed into the fiber bundle, which improves the stress transfer between the internal fiber filaments and the matrix, and nano-SiO2 reacts with calcium hy-droxide to form a calcium silicate hydrate gel, which improves its bonding performance. The silane coupling agent treatment can increase the surface roughness of the fiber, enhance the amount of nano-SiO2 adhered to the fiber, and then improve the bonding strength along the interface with the cement base. The interfacial strength of carbon fiber bundles impregnated with nano-SiO2 at 100 ℃ and 200 ℃ was significantly higher than that impregnated with epoxy resin. This study can provide a reference for TRC mechanical properties design and thermal stability improvement methods. © 2022 Hunan University. All rights reserved.
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页码：117 / 125
页数：8
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