<Original>Fire Endurance of Surface Densified Wood of Albizzia falcata Treated with Fire Retardant

Abstract

Bending strength and creep behavior under fire of solid wood, laminated veneer lumber (LVL) and glued-laminated timber of albizzia (Albizzia falcata Backer) coated with fire retardant and hot pressed (surface densified) at several temperatures were evaluated. Chemical used was trimethylolmelamine mixed with phosphoric acid coated at the amount of 100g/m^2. Results showed that the fire endurance (time to creep rupture) of surface densified albizzia treated with the chemicals was improved, compared to that of untreated ones. Temperature of hot pressing of 160℃ resulted in the longest time to creep rupture. Bending strength of woods was not affected when pressed at the temperature below 200℃.