Abstract:

The combustibility of eight broadleaf woody species in Xiaoxing an Mountain, Heilongjiang Province was studied by cone calorimetric analysis. The eight species were Betula platyphylla，Phellodendron amurense，Populus davidiana，Juglans mandshurica，Populus ussuriensis，Quercus mongolica，Acer tegmentosumand Fraxinus mandshurica. The thermal characteristics of dead leaves and barks, including heat release(heat release rate, HRR; total heat release, THR), time to ignition (TTI), mass loss (mass loss rate, MLR), smoke formation (smoke production rate, SPR; specific extinction area, SEA; total smoke release, TSR), were measured, and the fire performance index (FPI) was calculated based on the themal characteristic suitable. The result indicated the fire resistance of B. platyphylla was the lowest while A. tegmentosum was the strongest fire resistance, which was the best for firepreventing forest belts among the species. Q. mongolica was not suitable for firepreventing for its fallen leaves were poor fire resistance. There for it was time to establish an integrated and synthetic protocol for evaluating fireresistance among a range of tree species. 

Key words: cone calorimeter, fire resistance, broadleaf woody species