High-Temperature Drying and Its Effect on Wood Properties

This review of literature discloses some of the paths followed in drying wood at schedules continuously or partially at temperatures above the boiling point of water. Some problems encountered in controlling and scheduling such drying including determination of moisture changes of near surface layers, influence of environmental conditions, and strength reductions of heated wood, are listed and the need for further research stressed. Quality of wood dried at accepted schedules, both at constant high temperatures and under a varied level of low-high temperatures and humidities is reported. Both hardwoods and softwoods are covered in thicknesses from thin boards to dimension lumber. A detailed account is given of changes in mechanical properties of wood dried by high temperatures.

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