A model for the pyrolysis of two Nordic structural timbers

Aleksi Rinta-Paavola, Simo Hostikka*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

19 Citations (Scopus)
226 Downloads (Pure)


Performance-based design of the timber structures' fire resistance is often based on the reduced cross section and thus relying on empirical and numerical assessment of the charring propagation. The current work aims to construct models for the pyrolysis of spruce and pinewoods to allow coupled simulations of the cross-section reduction and burning rate in fire models. Kinetic models are formulated based on thermogravimetric data and supported by the heats of pyrolysis and combustion measurements by differential scanning calorimetry and microscale combustion calorimetry, respectively. The results from these small-scale measurements are consistent with each other, and the heats of pyrolysis and combustion are determined for the wood primary components by fitting the simulations to the experimental results. Heat release models are constructed based on the small-scale tests, and cone calorimeter experiments are used for the estimation of the physical properties and for the heat release model validation.

Original languageEnglish
Number of pages14
JournalFire and Materials
Issue number1
Early online date3 Feb 2021
Publication statusPublished - Jan 2022
MoE publication typeA1 Journal article-refereed


  • charring
  • pine wood
  • pyrolysis modelling
  • spruce wood


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