Abstract: In order to carry out all- round characterization and analysis of the characteristics of typical floor decoration materials in metro compartment, cone calorimeter is used to measure the heat release rate, total heat release, CO and CO2 release rate, and total smoke release rate during the material combustion process. The material is pyrolyzed under programmed temperature control by a thermogravimetry- infrared combined instrument, and the infrared absorption spectra of the material pyrolysis process at different temperatures are obtained. A field emission scanning electron microscope is used to characterize the morphology and structure of the residue after the material is burnt. Experimental results indicate that the material forms a flame-retardant carbon layer structure during the combustion process, which plays a role of heat insulation and oxygen insulation within a certain period of time, and delays the combustion reaction; the material burns completely within 8 minutes. Once a fire occurs, the heat hazard and smoke hazard are greater; The pyrolysis process can be divided into 4 stages; the material starts to decompose at 350 °C and reaches the peak of pyrolysis at 440 °C, producing a large amount of H2O, CH4 and aromatic compounds.

Key words: metro floor finish material, pyrolysis characteristic, combustion characteristic, fire hazard