Zur Abbrandrate von Holz in Abhängigkeit der Rohdichte

A. Gilka-Bötzow (1) , A. Heiduschke (2) , P. Haller (2)

1 Fachgebiet Werkstoffe im Bauwesen
2 Professur für Ingenieurholzbau und baukonstruktives Entwerfen

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 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 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.

Mots clés: Physical Sciences

A. Gilka-Bötzow, A. Heiduschke, P. Haller. Zur Abbrandrate von Holz in Abhängigkeit der Rohdichte. European Journal of Wood and Wood Products, 2010, 69 (1), pp.159-162. ⟨10.1007/s00107-010-0430-1⟩. ⟨hal-00587604⟩