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vol.12 número1COMPORTAMIENTO FRENTE AL FUEGO DE TABLEROS Y MADERA DE PINO RADIATA CON Y SIN PINTURA RETARDANTE DE LLAMA índice de autoresíndice de assuntospesquisa de artigos
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Maderas. Ciencia y tecnología

versão On-line ISSN 0718-221X

Resumo

TANAKA, Takashi; AVRAMIDIS, Stavros  e  SHIDA, Satoshi. A PRELIMINARY STUDY ON ULTRASONIC TREATMENT EFFECT ON TRANSVERSE WOOD PERMEABILITY. Maderas, Cienc. tecnol. [online]. 2010, vol.12, n.1, pp.03-09. ISSN 0718-221X.  http://dx.doi.org/10.4067/S0718-221X2010000100001.

Ultrasonic pre-treatment of small and pressure saturated Douglas-fir heartwood specimens at 20 kHz fixed frequency with an acoustic horn resulted in increased specific permeability coefficient in both radial and tangential directions. Statistical analysis revealed that there was a high correlation between ultrasonic treatment time and specific permeability coefficient. Improvement rate of permeability in both radial and tangential directions was nearly the same regardless of treatment time.

Palavras-chave : Douglas-fir; ultrasound; radial; tangential; air flow.

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