The velocity of combustion in relation to the density of wood

作者：Gilka Boetzow A^*; Heiduschke A; Haller P

来源：Holz als Roh- und Werkstoff, 2011, 69(1): 159-162.

DOI：10.1007/s00107-010-0430-1

In this study, the velocity of combustion (charring rate) of wood in relation to the mass density was determined. Three material types: Balsa, undensified and densified spruce and compressed laminated wood with material densities ranging between 155 and 1340 kg/m(3) were investigated. The specimens were exposed for 30 min in a furnace to the ISO 834-1 (Fire-resistance tests - elements of building construction - general requirements. Sept. 1999) Standard Fire. The experimental results show that the charring rate decreases exponentially with the increase in density. For densities above 800 kg/m(3) the charring rate reaches a constant value and becomes independent of the density. The reason for the non-linear charring behavior is the thermal conductivity of wood which increases with the increase in density. At the same time the isolating performance of the char layer decreases.

• 出版日期2011-2