Comparative Analysis of Smoke Toxicity of Different Expansion Type Fireproof Coatings
In order to study the smoke toxicity characteristics of expandable fireproof coatings during fires,a NBS smoke density test box was used to conduct laboratory scale fire simulation tests on 6 types of expandable fireproof coatings.FTIR analysis system was used to sample and analyze 8 types of gases,and the conventional toxicity index(CITG)was used to quantitatively evaluate the toxicity of flue gas.The results showed that the flue gas produced by the expandable fireproof coating contained CO2,CO,NOx and HCN gases.The toxicity of epoxy resin based expandable fireproof coatings was much greater than that of other resin based coatings.The NOx gas mass concentration at 4 min and 8 min was 108.43 mg·m-3 and 136.47 mg·m-3,respectively,which were higher than the reference concentration of 38 mg·m-3,and the CITG value reached 0.377 at 8 min.FITR gas analysis method can achieve online,multi-component gas rapid analysis,but there is significant interference and error in gas content near the detection limit.
expandable fireproof coatingsmoke toxicityquantitative evaluationconventional toxicity index
万方数据
维普
