Characterization of Acrocarpus fraxinifolius wood submitted to heat treatment
Título del documento: Characterization of Acrocarpus fraxinifolius wood submitted to heat treatment
Revue: Maderas : ciencia y tecnología
Base de datos:
Número de sistema: 000544867
ISSN: 0718-221X
Autores: 1
1
2
3
1
Instituciones: 1São Paulo State University, Department of Mechanical Engineering, Guaratinguetá, SP. Brasil
2Federal University of Southern and Southeastern Pará, Araguaia Engineering Institute, Santana do Araguaia, PA. Brasil
3Federal University of São Carlos, Departamento of Civil Engineering, São Carlos, SP. Brasil
Año:
Volumen: 24
País: Chile
Idioma: Inglés
Resumen en inglés Aiming to provide greater visibility for the wood species Acrocarpus fraxinifolius, the present study sought to analyze the influence of heat treatment on an industrial scale applied to wood species, also popularly known as Indian cedar. The heat treatment was carried out in an autoclave, with temperature and pressure control, and with saturated steam injection, for temperatures 155 ºC, 165 ºC, 175 ºC, and 185 ºC. Physical, chemical, and mechanical tests were carried out for the analyzed wood. The content of holocellulose and total lignin decreased, while the content of extractives showed a substantial increase. The density increased after the heat treatment, however the treated wood showed cracks, and these cracks influenced the significant loss of the values of the mechanical properties of compression, tension, and flexion. The shear showed strength gain for the temperature of 155 ºC, and the wood treated at 165 ºC was equivalent to untreated wood. The woods submitted to temperatures of 175 ºC and 185 ºC presented strength losses. The heat treatment in question contributes to increase the visibility, use and market value of wood.
Keyword: Acrocarpus fraxinifolius,
Chemical analyses,
Indian cedar,
Mechanical properties,
Thermal modification,
Thermal treatment.
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