建筑外墙保温材料不同着火点火蔓延试验分析

Analysis of Experimental on Fire Spread of Exterior Wall Insulation Materials at Different Ignition Positions

通过小尺寸的燃烧试验,研究建筑外墙保温材料不同失火位置的火蔓延特性,分析总结外墙保温材料不同失火位置的燃烧现象.选用了多组不同规格、材质的建筑外墙保温材料,建立保温材料燃烧试验模型,研究了保温材料的不同失火位置对于火蔓延特性产生的影响.根据材料的点火位置不同导致火蔓延温度、热辐射、质量的变化,总结不同失火位置燃烧特点.试验结果表明:向上蔓延火更快,更密集,向下蔓延火更持续,更稳定.通过分析并对比小尺寸向上蔓延火与向下蔓延火的试验燃烧特性,总结出实际火灾中外墙保温材料的火灾特性,对火灾撤离、消防救援提出实际建议.

Through small scale combustion experiment,the fire spreading characteristics of different misfire positions of building exterior wall insulation materials are studied,and the combustion phenomenon of different misfire positions of exterior wall insulation materials is analyzed and summarized.Several groups of building exterior insulation materials with different specifications and materials were selected,and an experimental model of thermal insulation material combustion was established to study the influence of different misfire positions of thermal insulation materials on fire spreading characteristics.According to the change of fire spreading temperature,heat radiation and mass caused by different ignition positions of materials,the combustion characteristics of different ignition positions are summarized.The experimental results show that the fire spreading upward is faster and denser,and the fire spreading downward is more sustainable and more stable.Through analyzing the experimental combustion characteristics of small size fire spreading upward and downward,the fire characteristics of external wall insulation materials in actual fire are summarized,and some practical suggestions for fire evacuation and fire rescue are put forward.