Recuperación geométrica por humidificación de madera densificada de ocho especies mexicanas

Javier Ramón Sotomayor Castellanos; Koji Adachi; Ryuichi Iida; Tomoyuki Hayashi

doi:10.18004/investig.agrar.2021.diciembre.2302709

Authors

Javier Ramón Sotomayor Castellanos Universidad Michoacana de San Nicolás de Hidalgo https://orcid.org/0000-0002-1527-8801
Koji Adachi Akita Prefectural University, Akita, Japan https://orcid.org/0000-0002-9962-5750
Ryuichi Iida Tokyo Polytechnic University, Tokyo, Japan https://orcid.org/0000-0001-7564-7616
Tomoyuki Hayashi Akita Prefectural University, Akita, Japan https://orcid.org/0000-0001-6276-184X

DOI:

https://doi.org/10.18004/investig.agrar.2021.diciembre.2302709

Keywords:

wood moisture, wood density, wood hygroexpansion

Abstract

The densification of the wood improves its hygroscopic properties; however, if the densified wood is exposed to moisture, it tends to regain its original shape. The research, with a comparative approach, aimed to determine the geometric recoveries of densified wood and to determine the radial hygroexpansions of solid wood of eight Mexican species: Cupressus lindleyi, Cedrela odorata, Swietenia macrophylla, Tabebuia donnell-smithii, Fraxinus uhdei, Fagus mexicana, Dalbergia palo-escrito and Guazuma ulmifolia. For this, a densification treatment was applied to wood of these species and later they were humidified to observe their hygroexpansions. The mean values of geometric recovery and radial hygroexpansion of the woods C. lindleyi, C. odorata, T. donnell-smithii, F. uhdei, F. mexicana, and G. ulmifolia increase as their densities increase (αR = 0,0095 ρCH - 2,66; R2 = 0,79). Different cases are the woods S. macrophylla and D. palo-escrito, for which the geometric recovery and radial hygroexpansion are comparatively lower than the other species. It is concluded that the average values of the geometric recovery and of the radial hygroexpansion of the woods C. lindleyi, C. odorata, T. donnell-smithii, F. uhdei, F. mexicana, and G. ulmifolia increase as their densities increase. On the other hand, for S. macrophylla and D. palo-escrito, geometric recovery and radial hygroexpansion are comparatively lower than the other species. Likewise, for the eight species studied, the geometric recovery of the densified wood is greater than the radial hygroexpansion of the non-densified wood. In the opposite sense, the coefficient of variation of the geometric recovery of densified wood is lower than that of non-densified wood. The values are different for each species, but their magnitudes are positioned close to the statistical trends obtained by other researchers.

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