Abstract

CALONEGO, Fred W.; SEVERO, Elias T. D.; CONEGLIAN, Ademilson  and  BARREIROS, Ricardo M.. Quality of Drying Wood of Eucalyptus grandis with Simultaneously Steaming in Boards and Logs. Silva Lus. [online]. 2006, vol.14, n.2, pp.169-180. ISSN 0870-6352.

In the present study, the union of the board pre-steaming and logs steaming techniques on Eucalyptus grandis wood drying quality, was evaluated. In order to do so, logs with diameters from 20 to <25, 25 to <30 and 30 to <35 cm, from the Horto Florestal, Mandurí, São Paulo, Brazil, were used. Half of the logs were steamed during 20 hours at 90ºC of temperature. Later the logs (control and steamed) were sawed with tangential system and the boards were pre-steamed during 3 hours at 90ºC of temperature after 1 hour of initial heating. The boards were dried in the dry-kiln pilot and the drying defects were evaluated. The results shown that the union of the board pre-steaming and logs steaming techniques caused: (1) reduction of the number of boards with drying defects classified as severe in the three logs diameters classes; (2) significant reduction of the average drying defects rate in the boards removed from the three logs diameter classes.

Keywords : boards pre-steaming; log steaming; Eucalyptus grandis; boards drying process.

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