Self-Extinguishment of Cross-Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue1709
Year of Publication
2016
Author
Crielaard, Roy
Van de Kuilen, Jan-Willem
Terwel, Karel
Ravenshorst, Geert
Steenbakkers, Pascal
Breunese, Arnoud
Year of Publication
2016
Format
Conference Paper
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 4477-4486
Summary
Cross-laminated timber, or CLT, is receiving attention for its potential use in tall buildings. As a combustible material, one of the challenges for the construction of these buildings is the fire risk that results from its use in the structure. Unprotected CLT can burn along with the fuel load present in a compartment. Irrespective of its fire resistance rating, it is uncertain whether the structure will be totally consumed in the event of a complete burnout, or whether a fire would decay by self-extinguishment. Self-extinguishment of CLT was investigated by first creating a theoretical model that determined the conditions under which it could be achieved. Two series of experiments were subsequently conducted to quantify these conditions. Based on these experiments it was concluded that there is a potential for self-extinguishment of CLT if: delamination and falloff of charred layers are prevented by applying sufficiently thick lamellae; the heat flux on the CLT during smouldering is below 5 to 6 kW/m2; and the airflow over the CLT surface during smouldering is limited to a speed of 0,5 m/s at heat flux exposures below 6 kW/m2. .
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