岩棉彩钢板火灾痕迹与受火情况的关联性研究

Study on correlation between fire traces and fire condition of rock wool color steel plates

为研究火场中岩棉彩钢板的火灾痕迹特征,以马弗炉和油盘火2种热源模拟火灾现场。首先,模拟理想条件下的火场辐射状况,改变马弗炉的热辐射温度,研究辐射温度对岩棉彩钢板火灾痕迹特征的影响特征;然后,以油盘火作为稳定热源,通过控制彩钢板与油盘的距离来改变彩钢板受热条件;最后,观察岩棉彩钢板受火后芯材和金属片的痕迹特征。结果表明:随着温度升高,芯材外形蓬松度逐渐增大,到600℃时,芯材整体收缩变形,1 000℃时,芯材严重受损开裂;金属板也呈现出不同程度的受损,外漆脱落,并出现凹坑、破裂等受损痕迹;研究结果为彩钢板建筑火灾调查中确定火势蔓延方向、起火部位和起火点提供依据。

To study the characteristics of fire traces of rock wool color steel plates in fire field,two kinds of heat sources,muffle furnace and oil pan fire,are used to simulate the fire site.Firstly,given the simulation of fire field radiation under ideal conditions,the thermal radiation temperature of muff furnace was adjusted to study its influence on the characteristics of fire traces.Secondly,with a stable combustion heat source of oil pan fire,the heating condition was changed by controlling the distance between the color plate and oil pan.Finally,the trace characteristics of core and metal sheet were observed after heating.The results show that with the increase of temperature,the core appears to be fluffier.It will shrink and deform at 600℃and get cracking at 1000℃,and metal plates also show damages at various degrees with paint falling off and pits,cracks and other damage marks these results provide a basis for determining fire spreading direction,fire location and point in fire investigation of color steel plate buildings.