COLORIMETRY AND SURFACE ROUGHNESS OF THREE AMAZON WOODS SUBMITTED TO NATURAL WEATHERING

Autores

  • Patrick Rogério Kerber patrick_kerber@hotmail.com
    Instituto de Ciências Agrárias e Ambientais, Universidade Federal de Mato Grosso, Sinop, Mato Grosso, Brasil
  • Diego Martins Stangerlin stangerlin@ufmt.br
    Instituto de Ciências Agrárias e Ambientais, Universidade Federal de Mato Grosso, Sinop, Mato Grosso, Brasil.
  • Elisangela Pariz elispariz@yahoo.com.br
    Instituto de Ciências Agrárias e Ambientais, Universidade Federal de Mato Grosso, Sinop, Mato Grosso, Brasil
  • Rafael Rodolfo de Melo rrmelo2@yahoo.com.br
    Instituto de Ciências Agrárias e Ambientais, Universidade Federal de Mato Grosso, Sinop, Mato Grosso, Brasil
  • Adilson Pacheco de Souza adilsonpacheco@ufmt.br
    Instituto de Ciências Agrárias e Ambientais, Universidade Federal de Mato Grosso, Sinop, Mato Grosso, Brasil
  • Leandro Calegari leandrocalegari@yahoo.com.br
    Centro de Saúde e Tecnologia Rural, Universidade Federal de Campina Grande, Patos, Paraíba, Brasil

DOI:

10.31413/nativa.v4i5.3426

Resumo

COLORIMETRIA E RUGOSIDADE SUPERFICIAL DE TRÊS MADEIRAS AMAZÔNICAS SUBMETIDAS AO INTEMPERISMO NATURAL

 This study aimed to evaluate the color and surface roughness of the wood of three  Amazonian species  submitted to natural weathering. For this purpose, samples of Apuleia leiocarpa (Vogel) J. F. Macbr., Erisma uncinatum Warm and Parkia pendula (Willd.) Benth. ex Walp., with dimensions of 1 x 2 x 30 cm (thickness, width and length, respectively), were exposed to natural weathering without contact with the soil for 240 days. The colorimetric characterization was performed by means of a colorimeter, and the parameters were L*, a*, b*, C*, h and ∆E. The roughness was determined with the aid of a profilometer of surface roughness, and the parameters Ra, Rz and Rt were evaluated. The wood exposed to natural weathering presented darkened (grayish color) surface, resulting from the reduction of colorimetric parameters L*, a* and b*. The Parkia pendula wood presented the greatest total variation of color in comparison to Apuleia leiocarpa and Erisma uncinatum. The parameters Ra, Rz and Rt showed an increase during the time of exposure of the woods to the natural weathering, in which Erisma uncinatum wood presented the roughest surface in comparison to the other species.

Palavras-chave: ensaio de campo, deterioração da madeira, madeira tropical, qualidade da madeira.

 

ABSTRACT

This study aimed to evaluate the color and surface roughness of the wood of three Amazonian species submitted to natural weathering. For this purpose, samples of Apuleia leiocarpa (Vogel) J. F. Macbr., Erisma uncinatum Warm and Parkia pendula (Willd.) Benth. ex Walp., with dimensions of 1 x 2 x 30 cm (thickness, width and length, respectively), were exposed to natural weathering without contact with the soil for 240 days. The colorimetric characterization was performed by means of a colorimeter, and the parameters were L*, a*, b*, C*, h and ∆E. The roughness was determined with the aid of a profilometer of surface roughness, and the parameters Ra, Rz and Rt were evaluated. The wood exposed to natural weathering presented darkened (grayish color) surface, resulting from the reduction of colorimetric parameters L*, a* and b*. The Parkia pendula wood presented the greatest total variation of color in comparison to Apuleia leiocarpa and Erisma uncinatum. The parameters Ra, Rz and Rt showed an increase during the time of exposure of the woods to the natural weathering, in which Erisma uncinatum wood presented the roughest surface in comparison to the other species.

Keywords: field trial, deterioration of wood, tropical wood, wood quality.


DOI: http://dx.doi.org/10.14583/2318-7670.v04n05a06

Referências

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Publicado

2016-10-31

Como Citar

Kerber, P. R., Stangerlin, D. M., Pariz, E., de Melo, R. R., de Souza, A. P., & Calegari, L. (2016). COLORIMETRY AND SURFACE ROUGHNESS OF THREE AMAZON WOODS SUBMITTED TO NATURAL WEATHERING. Nativa, 4(5), 303–307. https://doi.org/10.31413/nativa.v4i5.3426

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Artigos Científicos / Original research

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