Abstract
In this study logs of alder, maple, beech, oak, ash, hornbeam and Elm logs were used.. The variable parameters were the diameter classes at two levels( 50-60 and 60-70 cm), the steaming temperature at three levels(50, 60and75?C ) for alder, maple and(60, 75, 90?C) for other wood species, the steaming time were at the diameter class of 50-60cm, 10, 15, 25 hours (for Maple , Alder), 55,65,75 hours (for Hornbeam) 45, 55, 65 hours (for other wood species) and at the diameter class 60-70 cm, 15, 25, 30 hours(for Maple , Alder)65,75,85 hours(for Hornbeam) 55, 65, 75hours(for other wood species ). Five replicates were made and in total of 630 logs were analyzed. Physical and mechanical characteristics such as moisture content (before and after the steaming), hardness, pith diameter (after peeling) and the layer quality of all the species were measured. The results showed that the optimal steaming time and temperature is different for different species for both diameter classes (50-60 cm and 60-70 cm).The optimal steaming conditions at both diameter classes (50-60 and 60-70 cm) for alder and maple species as well as for beech and elm species were similar where to those for ash, oak and hornbeam species that require unique steaming conditions.
Keywords
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