Physical, chemical and mechanical characterization of Acrocarpus fraxinifolius cultivated in Sao Paulo

Abstract

Indian cedar (Acrocarpus fraxinifolius) is a wood species that occurs naturally in India, Myanmar (Burma) and Bangladesh, and has a high commercial value, with characteristics like mahogany and native cedars. The planting of Indian cedar has been undertaken in Brazil, but there is little information available regarding the characterization of the species. Therefore, considering its timber potential and its possibility of development in the country, the present work aimed to evaluate the physical, chemical, and mechanical properties of 9-year-old Indian cedar wood, planted in the southern region of Brazil. A low specific mass (502 kg/m³), low average dimensional stability (anisotropy coefficient of 2,09 %) was observed, in addition to the low content of extractives (1,94 %). From the mechanical characterization, an average value for the elastic modulus of 8963 MPa was obtained, and for the compressive strength parallel to the grain the average and characteristic values were 32,14 MPa and 21,46 MPa, respectively. This indicates that this wood belongs to resistance class C20 (dicotyledons). The results obtained classify the wood for use in light, external, or internal civil construction

Avaliação do vergamento da madeira de Acrocarpus fraxinifolius pela técnica de vaporização

“…Nessa escolha das lamelas, estas foram Avaliação do vergamento da madeira de Acrocarpus fraxinifolius pela técnica de vaporização Oliveira, R. D. da S.; Jardim, P. I. L. G.; Souza, A. J. D. de; Christoforo, A. L.; Molina, J. C. 6 separadas somente em lamelas retiradas do cerne e outras das regiões do alburno. As madeiras utilizadas nesta pesquisa foram classificadas mecanicamente segundo a NBR 7190-3 (ABNT, 2022), enquadrando-se na classe de resistência D20 com umidade de 12% ± 1% (Oliveira;Oliveira;Molina, 2022).…”

“…Apresenta estabilidade dimensional moderada e propriedades de resistência e rigidez compatíveis com diversas espécies de reflorestamento. É uma opção adequada para aplicações de baixa demanda de esforços, como coberturas, mobiliário e esquadrias (Oliveira;Oliveira;Molina, 2022). Vale mencionar que não foram encontrados estudos que se dedicam a analisar a influência da região de corte do tronco (alburno ou cerne) no comportamento do elemento vergado.…”

“…A maior predominância de cerne ou de alburno não afetou (0,322 ≤ p-valor ≤ 0,891) de forma significativa nos valores médios das forças necessárias ao vergamento das lamelas considerando-se todas as espessuras investigadas. As árvores de origem da madeira possuíam nove anos de idade (Oliveira;Oliveira;Molina, 2022), podendo explicar a diferença pouca significativa encontrada.…”

Collage Quality of Brazilian Woods for Use in Glued Laminated Timber Beams

“…The most common species of Brazilian reforestation woods are pine and eucalyptus, [9]. In addition, in Brazil there is a great availability of reforestation woods, [10]. There are several factors that can influence the wood glue quality response with structural adhesives.…”

Characteristics of Simalambuo (Lophopetalum sp.) wood from Nias Island, North Sumatra Province, Indonesia

“…To ensure the safety and efficiency of wood as a building material, it is crucial to have a comprehensive understanding of its fundamental characteristics, and this includes knowledge about the physical, mechanical, and durability properties. Research conducted by Almeida et al (2013), Araujo et al (2016), andde Oliveira et al (2022) emphasized the importance of investigating these aspects. Therefore, research activities were carried out to analyze the physical, mechanical, chemical, and natural durability of Simalambuo wood concerning its resistance against subterranean termite attacks.…”