Abstract
An experimental study was conducted to determine the characteristics of the flame spread and droplets of metal-polyethylene (PE) sandwich panels during combustion. The mass-loss rate, average flame height, temperature, and fire spread rate were investigated. The results showed that the fire spread rate, mass change of the droplets, average flame height, and temperature increased with an increase in the sample length, except for the mass loss rate of the 40 cm-long sample. The time interval between the droplets decreased, and the flame pulsation frequency increased. The relationship between the flame height and sample length was determined. During the combustion process, bending deformation and top flame phenomena occurred due to the shrinkage of the PE, which increased the fire risk. The distance between the outer surface of the expanded metal aluminum layer and the insulation panel increased with an increase in the panel length. A schematic diagram of the fire spread of the metal sandwich panel was established based on the observations and theoretical analysis. The mechanism and combustion behavior of the metal sandwich panels were determined to provide references for the construction of metal sandwich panels of exterior walls.
Highlights
Polymer is a widely used insulation material in industrial buildings, warehouses, and other locations
The building exterior insulation material in high-rise building fire accidents is important to the fire safety, which is compared with fire safety codes to identify key areas for improvement [2,3]
The results showed that the rate of mass loss of the metal sandwich panel i3n.c4r.eMasaesds-wLoistshRaanteinocfrtehaeseMientatlhSeapnadnweilclhenPganthe.l The average mass loss rate ma was deduced usingTthheemmaessth-loodssorloagteyodf ethscersiabneddwbiychthpeanauelthreofrlsecotefdRtehfe. [s2e9v]e.rimtyl o=f mthae/cLomisbduesfitinoendanasd tthhee afivreeriangteenmsiatyss
Summary
Polymer is a widely used insulation material in industrial buildings, warehouses, and other locations. Oleszkiewiczl and Burgess tested the fire spread characteristics of different types of insulation materials for metal sandwich panels using a full-scale experimental platform. Lie used a full-scale experimental platform to analyze the influence of the flame spread rate of EPS metal sandwich panels on the combustion of the insulation around the panels. The application of external wall insulation panels had a positive effect [15] These studies have analyzed the influence of external radiation, the sandwich panel material, sandwich panel thickness, and other parameters on the fire spread. The influence of the panel length on the flame spread characteristics, including the flame shape, flame spread rate, mass loss rate, flame height, and the internal temperature of the sample, was analyzed
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