Prediction of Fire Risk of Wood by Chung's Equation-XII and New Fire Risk Rating Assessment

초록

The fire risk prediction and fire risk rating of wood were comprehensively evaluated using Chung's Equation-XII. The Japanese cedar, spruce, lauan, and red pine were selected as the test specimens. The combustion test on the specimen was performed using a cone calorimeter according to the ISO 5660-1 standard. After combustion, the fire performance index-XI (FPI-XI) by Chung's equations-XI ranged from 0.34 to 1.26, and the fire growth index-XI (FGI-XI) ranged from 0.78 to 2.78. The newly proposed fire risk rankings (FRR) for the calculated Fire Risk Index-XII (FRI-XII) by Chung's equation-XII increased in the following order: spruce (0.60): grade A approximate to polymethylmethacrylate (PMMA) (1): grade A < red pine (1.10): grade B < Japanese cedar (4.17): grade G approximate to laun (8.18): grade G. In conclusion, the materials with low moisture content and high COPmean/CO2Pmean have lower fire performance index-XI, and the materials with long accumulated smoke generation time (ASGT) and low COPmean/CO2Pmean have lower fire growth index-XI. In other words, as the fire performance index-XI increases and the fire growth index-XI decreases, the fire risk index-XII decreases.

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