Bioresistance of Poplar Wood Compressed by Combined-Hydro-Thermo-Mechanical Wood Modification (CHTM) Process

IRG/WP 10-40532

L Khademi-Bami, B Mohebby

Bioresistance of treated Poplar wood by CHTM process (Combined-Hydro-Thermo-Mechanical Wood Modification) was studied in the current research work. Resistance against brown rot fungus Gloeophyllum trabeum as well as the soft rot decay was the main concern of this work. Poplar wood blocks were hydrothermally treated at temperatures of 120,150 and 180°C for holding time of 0, 30 and 90 min. afterwards, the blocks were compressed at temperatures of 160 and 180°C for 20 min. The treated blocks were oven dried for 24 hours at 103±2°C. Small specimens were cut from the blocks and exposed to the brown rot fungus according to EN 113. Also, mini-stakes were prepared and exposed to soil according to ENV 807. Results revealed that the bioresistance of the CHTM treated poplar wood increased due to the hydrothermal modification. Increase of the holding time as well as the press temperature reduced the fungal activity in the CHTM treated wood. According to the results of previous and the current works, the treated wood at temperature of 150°C for a holding time of 30min and compressed at press temperature of 180°C was selected as the best treatment.


Keywords: CHTM (Combined Hydro-Thermo-Mechanical modification, bioresistance, soft rot, brown rot

Conference: 10-05-09/13 Biarritz, France


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