The aim of the fire tests presented in this report was to measure the mass loss and the charring depth of CLT (cross-laminated timber) elements with different types of adhesives when exposed to fire from below. CLT elements may heat delaminate when exposed to heat. If this occurs, it depends, among other things, on the temperature of the adhesive and on the adhesive’s ability to retain its adhesive properties. Eleven adhesives are used in FIRENWOOD project in order to compare properties in fire. Adhesives originate from four different chemical backgrounds and represent the state of the art of adhesives used in timber structures. Adhesives are manufactured by 4 leading European adhesive manufacturers, and all 11 adhesives have passed requirements in European standards for load-bearing timber structures. Adhesives are marked with numbers 1 to 12 (adhesive no 10 is not included in this Work Package). Not all adhesives were tested for this method and is therefore not presented in the results.However, some additional adhesives were used in the tests presented in this report and are marked 21, 22, 23 and 24. The same numbers are used for all adhesives in all tests throughout FIRENWOOD project.
The FIRENWOOD project is supported under the umbrella of ERA-NET Cofund ForestValue by Germany (Federal Ministry of Food and Agriculture (BMEL); Agency for Renewable Resources (FNR) project number FKZ 2219NR120), Sweden (The Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (FORMAS); Swedish Energy Agency (SWEA); Swedish Governmental Agency for Innovation Systems (Vinnova) project number 2018-04989) and Norway (Research Council of Norway (RCN) project number 298587). ForestValue has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 773324.