Application of the steaming step during kiln drying of lumber of two tropical species with high growth stress presence

The relaxation of growth stress in trees from plantation forests of tropical areas is manifested in the quality of wood after the sawing and the relaxation of drying stress is expressed during the drying process, producing low wood quality. The present study aims to evaluate the lumber quality in lo...

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Bibliographic Details
Published in:Drying technology 2022-11, Vol.40 (15), p.3231-3240
Main Authors: Moya, Roger, Tenorio, Carolina
Format: Article
Language:English
Subjects:
Defects
Drying
Drying defects
drying improvement
log treatment
Lumber
Moisture content
Moisture effects
Sawing
Steaming
Stress
Tropical forests
tropical wood
Wood
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Summary:The relaxation of growth stress in trees from plantation forests of tropical areas is manifested in the quality of wood after the sawing and the relaxation of drying stress is expressed during the drying process, producing low wood quality. The present study aims to evaluate the lumber quality in logs by heating and steaming application before sawing as pretreatment to reduce growth stress and the application of steaming step during drying of Dipteryx panamensis (almendro) and Hieronyma alchorneoides (pilón) wood. The results showed that the variation of moisture content and drying rate concerning drying time in wood from logs steamed before or during drying led to a quick increase in the drying rate and a decrease in the moisture content. The steaming application to the logs or during drying decreased the incidence and magnitude of drying defects and increased the quality of dried lumber, especially bow, split, crook, and check defects.
ISSN:0737-3937
1532-2300
DOI:10.1080/07373937.2021.2017299