Analysis of glue line and correlations between density and anatomical characteristics of Eucalyptus grandis × Eucalyptus urophylla glulam

  • Rafael Gonçalves Espósito De Oliveira
  • Fabricio Gomes Gonçalves
  • Pedro Gutemberg De Alcântara Segundinho
  • José Tarcísio Da Silva Oliveira
  • Juarez Benigno Paes
  • Izabella Luzia Silva Chaves
  • Alice Soares Brito
Keywords: Apparent density, castor polyurethane, delamination, laminated wood, resorcinol-formaldehyde

Abstract

This study aimed to analyze the glue line thickness effect and its relation with density and anatomical characteristics of eucalyptus wood. Thus, the thickness of main and secondary glue lines was measured as well as their interaction with apparent density of elements glued with resorcinol-formaldehyde (RF) and castor oil polyurethane (CP) adhesives. Anatomical wood characterization of Eucalyptus grandis × E. urophylla was performed by correlating glue line thickness. According to normative instruction, specimens were produced for delamination tests. The experiment was conducted in a completely random 2 × 2 design factorial scheme (two classes of wood apparent density and two adhesives). Pearson correlation (t < 0,01) was performed among variables. It was found that there was adhesive penetration into vessels and rays of wood. Glue line thickness was higher in woods with density higher than to 0,58 g∙cm-3 glued with RF adhesive. There was a low correlation between wood density and vessel diameter to main and secondary glue lines (t < 0,01).

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Published
2020-10-01
How to Cite
Espósito De Oliveira, R. G., Gomes Gonçalves, F., De Alcântara Segundinho, P. G., Tarcísio Da Silva Oliveira, J., Benigno Paes, J., Silva Chaves, I., & Soares Brito, A. (2020). Analysis of glue line and correlations between density and anatomical characteristics of Eucalyptus grandis × Eucalyptus urophylla glulam. Maderas-Cienc Tecnol, 22(4), 495-504. Retrieved from http://revistas.ubiobio.cl/index.php/MCT/article/view/4172
Section
Article

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