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

Autores

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

Palavras-chave:

umidade da madeira, densidade da madeira, hidro-expansão da madeira

Resumo

A densificação da madeira melhora suas propriedades higroscópicas; no entanto, se a madeira densificada a madeira é exposta à umidade, ela tende a recuperar sua forma original. A pesquisa, com um abordagem comparativa, com o objetivo de determinar as recuperações geométricas da madeira densificada e para determinar as higroexpansões radiais de madeira maciça de oito espécies mexicanas: Cupressus lindleyi, Cedrela odorata, Swietenia macrophylla, Tabebuia donnell-smithii, Fraxinus uhdei, Fagus mexicana, Dalbergia palo-escrito e Guazuma ulmifolia. Para isto, uma densificação tratamento foi aplicado à madeira destas espécies e mais tarde foram umedecidos para observar suas hisgroexpansões. Os valores médios da recuperação geométrica e da higroexpansão radial de os bosques C. lindleyi, C. odorata, T. donnell-smithii, F. uhdei, F. mexicana, e G. ulmifolia aumentam conforme aumentam suas densidades (αR = 0,0095 ρCH - 2,66; R2 = 0,79). Os diferentes casos são as madeiras S. macrophylla e D. palo-escrito, para as quais a recuperação geométrica e radial a higroexpansão é comparativamente menor do que a de outras espécies. Conclui-se que a valores médios da recuperação geométrica e da higroexpansão radial das madeiras C. lindleyi, C. odorata, T. donnell-smithii, F. uhdei, F. mexicana, e G. ulmifolia aumentam conforme suas densidades aumentam. Por outro lado, para S. macrophylla e D. palo-escrito, as densidades geométricas A recuperação e a higroexpansão radial são comparativamente menores do que as outras espécies. Da mesma forma, a recuperação e a higroexpansão radial são comparativamente inferiores às outras espécies, para as oito espécies estudadas, a recuperação geométrica da madeira densificada é maior do que a higroexpansão radial da madeira não-densificada. No sentido oposto, o coeficiente de variação da recuperação geométrica da madeira densificada é menor do que a não-densificada madeira. Os valores são diferentes para cada espécie, mas suas magnitudes são posicionadas próximas a as tendências estatísticas obtidas por outros pesquisadores.

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