Study on the effectiveness of wood fireproof coatings under repeated heating conditions
In order to investigate the effect of thermal radiation in-tensity on the performance of wood fire retardant coatings after fire retardant treatment by the surface coating method for the am-nioblast coatings of the P-N-C fire retardant system,experiments were carried out using cone calorimetry(CONE)and simultane-ous thermal analyzer(STA).The carbon layer secondary heating method was proposed to effectively test the flame retardant perfor-mance of fire-resistant coatings under different fire conditions,and the reliability of the conclusions was verified using thermo-gravimetric analysis technology.Through the thermogravimetric analysis of the coatings and the analysis of the secondary radiation heating data of the coated specimens,it was concluded that the coatings were completely charred in the temperature range of 575～750℃and entered into a relatively stable stage.Mean-while,the ignition time,heat release rate,total smoke produc-tion and fire growth index of the secondary heating of the coated specimens were analyzed in comparison with those of the radia-tion intensity of 35 kW/m2 in this temperature range,and it was concluded that the fire retardancy of the expanded charcoal layer was the best in this condition.
NETL
NSTL
万方数据
维普
