Journal Paper

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Journal: علوم کشاورزی
Year:1386 | Volume:13 | Issue:3
Start Page:725 | End Page:736

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Title

DEVELOPMENT OF WOOD DRYING SCHEDULE FOR 32 MM THICKNESS MAPLE (ACER INSIGNE BOIS) LUMBERS IN CONVENTIONAL KILNS

Pages

 Start Page 725 | End Page 736

Abstract

 This research was done with the aim of determination optimum wood DRYING SCHEDULE for 32 mm thickness Maple (Acer insigne) lumbers. The trees cut from Lireh-sar region of Nousahhr (north of Iran) and dried from green to 8% MC using three different codes as T8-D4 (recommended by FPL), T9-D4 and T8-D5. Specific gravity of the samples was 0.45 and 0.48 with green and dry volume respectively. In addition, volumetric shrinkage was 10.47percent. Number of DEFECTS such as wrap, bow, twist and surface cracks in each charge was measured and statistical control charts were drawn. Results shows that DEFECTS level were almost in acceptable ranges in all three schedules after DRYING, but its average was less and were more evenly distributed when using T8-D4 schedule. In other words, one could conclude that this program has decreased DRYING time, while increasing dried wood quality in comparison the others. Finally, it is recommended doing conditioning treatment for about 36 to 48 hours, if needed.

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