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首页> 外文期刊>Construction and Building Materials >Mesoscale experimental investigation of thermomechanical behaviour of the carbon textile reinforced refractory concrete under simultaneous mechanical loading and elevated temperature
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Mesoscale experimental investigation of thermomechanical behaviour of the carbon textile reinforced refractory concrete under simultaneous mechanical loading and elevated temperature

机译：碳纺织增强耐火混凝土热机械性能下的介质实验研究及升高温度

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摘要

In comparison with carbon fiber reinforced polymer material, the carbon textile reinforced concrete (TRC) is usually coted to have a better fire behaviour. The aim of this paper is to analyse the elevated temperature behaviour of TRC. This paper presents the experimental results conducted on carbon TRC at mesoscale in the range of temperature from 25 degrees C to 700 degrees C. The carbon TRC consists of refractory matrix and carbon textile which has been treated with amorphous silica products for a good bond with the cement matrix. As a result, carbon TRC showed the strain-hardening behaviour with different phases and brittle behaviour depending on the temperature. The evolution of carbon TRC properties with elevated temperature (the ultimate stress, the crack stress, the initial stiffness) was experimentally identified. The mechanical property evolution of carbon textile and refractory concrete (the ultimate strength, the Young's modulus) depending on temperature was also presented. The thermal tests on carbon TRC cylinder specimens were also performed to identify the diffusivity coefficient of this composite. All results obtained were analyzed in order to find the contribution of carbon textile and refractory matrix to fire resistance of carbon TRC. Its ultimate strength has been improved about 2 times compared with non-reinforced matrix at elevated temperature ranging from 25 degrees C to 400 degrees C. The efficiency coefficient of carbon textile could be calculated in this study. (C) 2019 Elsevier Ltd. All rights reserved.
机译：与碳纤维增强聚合物材料相比，碳纺织钢筋混凝土（TRC）通常被捕获以具有更好的火灾行为。本文的目的是分析TRC的高温行为。本文介绍了在温度范围为25摄氏度至700℃的温度范围内对碳TRC进行的实验结果。碳TRC由耐火基质和碳织物组成，该碳织物已经用无定形的二氧化硅产品进行处理，以良好的结合水泥基质。结果，碳TRC显示出具有不同相的应变硬化行为，并且根据温度脆性行为。实验鉴定了温度升高（极限应力，裂纹应力，初始刚度）的碳TRC性能的演变。还提出了根据温度的碳纺织和耐火混凝土（极限强度，杨氏模量）的机械性能演化。还进行了碳TRC气缸样品的热试验以识别该复合材料的扩散系数。分析所有结果以发现碳纺织品和耐火基质对碳TRC的耐火性的贡献。与从25摄氏度到400℃的升高温度下的非增强基质相比，其极限强度得到了改善约2次。可以在本研究中计算碳纺织品的效率系数。 （c）2019 Elsevier Ltd.保留所有权利。

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