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Study of Behavior of Textile-Reinforced Concrete with Epoxy Resin Matrix in Fire
Fire Technology ( IF 2.3 ) Pub Date : 2021-05-30 , DOI: 10.1007/s10694-021-01116-y
Richard Fürst , Tomáš Vlach , Marek Pokorný , Vladimír Mózer

Textile-reinforced concrete is currently most frequently used for non-load–bearing structures, but there is a vision for also using it in load–bearing construction elements. In recent years, this construction material has been subjected to detailed examination. Different combinations of materials for potential use in textile-reinforced concrete have been described. These differ in the type of concrete mix and the composition of the textile reinforcement. The aim of this work is to test the application of a specific textile-reinforced concrete, consisting of high-performance concrete, textile reinforcement from carbon fibers and its epoxy resin matrix, at an elevated temperature. The combination of these materials makes it possible to produce subtle load–bearing structures with excellent mechanical properties. The critical issue is the behavior of these structures when exposed to fire. A series of medium-scale fire condition experiments were carried out with a temperature load based on the ISO 834 curve, followed up by mechanical tests. The aim of these experiments was to describe critical areas of textile-reinforced concrete in fire and to propose possible solutions. In an indicative fire experiment, experimental samples displayed massive spall of concrete layers, and interaction between materials was lost due to the low temperature resistance of the epoxy resin. Concurrently, the optimal quantity of polypropylene fibers was experimentally determined. This paper presents an experimental demonstration of the problematic aspects of textile-reinforced concrete and subsequent recommendations for future work with practical application in the design of load–bearing structures.



中文翻译:

环氧树脂基体织物增强混凝土在火灾中的行为研究

纺织钢筋混凝土目前最常用于非承重结构,但也有将其用于承重建筑构件的愿景。近年来,对这种建筑材料进行了详细检查。已经描述了可能用于织物增强混凝土的不同材料组合。它们的区别在于混凝土混合物的类型和织物增强材料的成分。这项工作的目的是测试特定纺织增强混凝土的应用,该混凝土由高性能混凝土、碳纤维纺织增强材料及其环氧树脂基体组成,在高温下。这些材料的组合使得制造具有优异机械性能的微妙承重结构成为可能。关键问题是这些结构在暴露于火中时的行为。在基于 ISO 834 曲线的温度负载下进行了一系列中等规模的火灾条件实验,随后进行了机械测试。这些实验的目的是描述织物增强混凝土在火灾中的关键区域并提出可能的解决方案。在指示性火灾实验中,实验样品显示混凝土层大量剥落,并且由于环氧树脂的耐低温性而失去了材料之间的相互作用。同时,通过实验确定了聚丙烯纤维的最佳用量。

更新日期:2021-05-30
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