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为研究“无痕”助燃剂在火灾现场的燃烧痕迹,选用涤纶地毯和乙烯-醋酸乙烯酯(EVA)拼图地板作为纤维和泡沫类地板的代表,以工业酒精作为易挥发助燃剂的代表,研究助燃剂用量、灭火方式等对燃烧痕迹形成特征规律的影响。通过与未加载助燃剂的燃烧痕迹对比发现,加载工业酒精后,纤维类地毯因浸润性强、热稳定性差,燃烧轮廓以典型的灰化形式存在,往往形成烧洞;EVA拼图地板材料则出现圆润的燃烧轮廓,轮廓内部的炭化物细碎,表面有典型的白色鼓泡,酒精用量增加时,鼓泡更多更紧密,与地面的粘结更为紧密;灭火射水,特别是燃烧过程中的射水对燃烧痕迹具有较大的破坏作用,但是熄灭后的射水不会将与地面紧密粘结的可燃地面材料的熔融炭化物冲离地面。
In order to study the combustion trace of “no trace” combustion improver on fire scene, we choose polyester carpet and ethylene-vinyl acetate (EVA) puzzle flooring as representatives of fiber and foam flooring, industrial alcohol as the representative of volatile volatilizing agent , To study the influence of the amount of combustion improver and fire extinguishing method on the formation and characteristics of combustion marks. Compared with the combustion traces of unburned combustion improver, the fiber carpets tended to form burning holes because of their strong infiltration, poor thermal stability and typical combustion profiles after loading industrial alcohol. EVA puzzle flooring materials appeared Round combustion profile, the outline of the internal crushed carbide, the surface of a typical white bubbling, the amount of alcohol increases, the bubble more and more closely, and the ground more closely bonded; fire water, especially in the process of shooting water It has a great damaging effect on the burning traces, but the extinguished water does not flush the molten carbide of the combustible ground material tightly bonded to the ground.