Study of tunnel pavements behaviour in fire by using coupled cone calorimeter - FTIR analysis
Study of tunnel pavements behaviour in fire by using coupled cone calorimeter - FTIR analysis
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DOI：
10.1016/j.firesaf.2016.01.010
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发表时间：
2016-04-01
影响因子：
3.1
通讯作者：
Alvear, D.
中科院分区：
文献类型：
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作者：
Puente, E.;Lazar, D.;Alvear, D.
近年来，人们越来越关注分析路面对火灾增长的贡献，以提高隧道的安全性。然而，只有很少的分析考虑或量化的有毒气体排放的路面烧毁。在这项研究中，同时进行锥形量热仪和FTIR分析，以评估两种不同类型的防火路面（混凝土和沥青）的火灾增长的贡献，获得的平均值的热释放率每单位面积分别为0和50千瓦/米（2）。监测所释放的一氧化碳，以评估燃烧的完成程度，并比较这些材料的潜在毒性。还获得了在420-450摄氏度范围内的沥青的进一步近似着火温度。结果表明，混凝土路面不有助于火灾的增长，因为没有点火观察到，而沥青路面有助于类似的其他组件中通常发现的车辆。沥青路面燃烧过程中检测到非常不透明的烟雾与显着浓度的CO。在沥青路面样品中观察到严重的热降解，包括煅烧和骨料的分离，而在混凝土路面样品的表面上，仅报告了一些轻微的裂缝。(C)2016爱思唯尔有限公司版权所有。
In recent years there has been a growing interest in analyzing the contribution of pavements to fire growth for improving safety in tunnels. However, only few analyses take into account or quantifying toxic gases emitted during the pavement burn out. In this study, simultaneous cone calorimeter and FTIR analyses were conducted to evaluate the contribution to fire growth of two different types of fireproof pavements (concrete and asphalt) obtaining averaged values of heat release rate per unit area of 0 and 50 kW/m(2) respectively. The CO released was monitored as a valuation of how complete is the combustion taking place and also to compare the toxic potential of such materials. Further approximated ignition temperatures of asphalt in the range of 420-450 degrees C were also obtained. The results indicate that concrete pavement do not contribute to fire growth since no ignition was observed while asphalt pavement contributes similarly to other components generally found in vehicles. Very opaque fumes with significant concentrations of CO were detected during asphalt pavement combustion. Severe thermal degradation was observed in the asphalt pavement samples, including calcination and the detachment of aggregates while on the surface of concrete pavement samples just some minor cracks were reported. (C) 2016 Elsevier Ltd. All rights reserved.