55mm厚红桉板材气干特性的研究

Research on the Air Drying Characteristics of 55 mm Red Tiwi Timber

对55mm厚红桉板材气干特性与规律的研究结果表明,当红桉板材的含水率在30%以上时,在广州的2、3、4月份进行气干比较合适,在其它月份则应采取适当保护措施,以防止产生干燥缺陷;板材气干到含水率25%时即进行窑干,具有较好的经济效益;板材窑干前应进行调湿处理,以降低含水率梯度,从而有效避免表裂的发生。

The air drying characteristics and rule of 55 mm red tiwi timber were studied in this paper. The experimental result suggested that it was appropriate for red tiwi timber to perform air drying during February, March and April in Guangzhou, as the moisture content was higher than 30% ; and the air drying process can also be performed in other months, however, it needed some proper protective measure to avoid the occurrence of drying defect. It would be economical to perform the kiln drying after the fresh timber was air - dried to the moisture content of 25% , and before the kiln drying the timber should be treated with humidity -controlling to reduce the moisture content gradient and hence to effectively avoid the happening of surface split.