Effects of Heating Temperature and Time on the Physical Properties of Heat-Treated Wood

Abstract

This study was performed to investigate the effects of heat treatment on the physicalproperties of two species of wood under different heating conditions including at 180℃ for 12h and 24h, and at 210℃ for 3h and 6h. Heat treatment tests for Pinus densiflora and Larixkaempferi were performed in order to assess the effects on the properties of dimension, weight,density loss, and water absorption. The results showed heat treatment caused significant changesin physical properties such as the dimension, weight, density loss and amount of waterabsorption. The dimension, weight and density of wood after heat treatment decreased as theheating temperature and time were increased. The amount of water absorption was lower inheat-treated wood than that in solid wood until 48hours. However, the water absorption ofheat-treated wood was higher in heat-treated wood than that in solid wood at 96hours. Theamount of water absorption of solid Pinus densiflora was higher than that of solid Larixkaempferi.