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| Huller, Lenon Augusto Simon; Haselein, Clóvis Roberto; Silveira, Amanda Grassmann da; Menezes, Walmir Marques de; Talgatti, Maiara; Souza, Joel Telles de; Santini, Elio José. |
| The genera Eucalyptus is widely used by Brazilian industries. Nonetheless some concerns still persist regarding some of its technological properties. Aiming the improvement of the wood properties the heat treatment is being largely employed in Brazil. The objective of this research was to study the effect of heat treatment on physical and mechanical properties of Eucalyptus cloeziana. We sampled 5 trees with 21 years from which we used the first two logs with length of 3 m each. Heat treatment of 160 and 210 °C were applied for 1 h. The evaluate physical properties were equilibrium moisture content, mass reduction, loss of density, total swelling coefficient (linear and volumetric) and coefficient of anisotropy. The determination of the mechanical strength... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dimensional stability; Thermal treatment; Wood quality Recursos Florestais Estabilidade dimensional; Termorretificação; Qualidade da madeira. |
| Ano: 2017 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1288 |
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| Talgatti, Maiara; Baldin, Talita; Silveira, Amanda Grassmann da; Santini, Elio José; Vidrano, Bibiana Regina Argenta. |
| This study aimed to evaluate physical and mechanical properties of wood-plastic composites using materials of low processing level. Residues from carpentry as wood shavings from three forest species (Pinus elliottii, Hovenia dulcis and Maclura tinctoria), and thermoplastic type were used. Data were submitted to Duncan’s test with 95% confidence. In relation to the modulus of rupture (MOR) and elasticity- (MOE), all treatments presented successful results, without difference. For the tests of internal bond and screw pullout, the results were not satisfactory. For this last test, the best result was for Hovenia dulcis. In relation to swelling in 2 h and 24 h, all treatments presented positive results. In general, the results were not influenced by the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wood residues; Scanning microscopy; Thermoplastic Recursos Florestais Resíduos de madeira; Micrografia de varredura; Termoplástico. |
| Ano: 2017 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1385 |
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| Talgatti, Maiara; Susin, Felipe; Carvalho, Douglas Edson; Santini, Elio José. |
| This study aimed to verify the basic density influence in dynamic bending trails of Hovenia dulcis Thunb wood. In order to do so, 34 samples of heart wood were used, with the following dimensions: 30 x 2 x2 cm (longitudinal, radial and tangential) respectively, according to the Brazilian standard, NBR 7190 (1997). The samples were evaluated for their basic density for the rate between the weight in 12% of moisture and its respective volume and posteriorly, it was separated in two groups: the first with specific weight between 0,55 and 0,64 g/cm³ and the second one between 0,65 and 0,75, aiming the comparison between the treatments. The wood resistance for the dynamic bending was estimated, using the Charpy’s impact test, in the radial direction.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Propriedade mecânica; Qualidade da madeira; Resistência ao impacto.. |
| Ano: 2017 |
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/14191 |
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| Santini, Elio José; Talgatti, Maiara; Silveira, Amanda Grassmann; Haselein, Clóvis Roberto; Azambuja, Rafael da Rosa. |
| The aim of this study was verify the drying rate and the wood quality from Hovenia dulcis, subjected to three drying processes (45, 60 and 75 ºC ). This way, 45 boards with the followings dimensions were used: 25 x 100 x 500 mm. These boards were dried until reach a moisture of 10%. The defects were quantified using a caliper, measuring the maximum deformation in the middle or in an extremity of the piece, depending on the type of defect. The results showed that the drying rate until 30% was greater than the others were and increased with higher temperatures, except for the 45 ºC process, not only in the hygroscopic stage but also from green condition to 10% of moisture. Although some warps have happened, the values were lower than those ones admitted by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Defeitos; Taxa de secagem; Umidade da madeira.. |
| Ano: 2016 |
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/13521 |
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| Santos, Ana Paula Camargo dos; Chiossi, Carla Cristina; Souza, Joel Telles de; Talgatti, Maiara; Silveira, Amanda Grassmann da; Menezes, Walmir Marques de; Coldebella, Rodrigo. |
| Estudos que visam a determinação da durabilidade da madeira auxiliam na definição de parâmetros para prever a vida útil dos produtos à base desse material, permitindo desta forma realizar indicações de uso da madeira de maneira confiável. Diante do exposto, objetivou-se com o presente trabalho avaliar a durabilidade natural de cinco espécies florestais, sendo três nativas (Tetrorchidium rubrivenium, Maclura tinctoria e Parapiptadenia rigida) e duas exóticas (Hovenia dulcis e Tectona grandis). As amostras de madeira foram instaladas a campo de apodrecimento pelo delineamento inteiramente casualizado, onde permaneceram expostas pelo período de 240 dias, sendo que a cada 60 dias parte das amostras foram coletadas, afim de abservar a influência do tempo na... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2019 |
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/21011 |
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| Dittmann, Raquel Luiza; de Souza, Joel Telles; Talgatti, Maiara; Baldin, Talita; de Menezes, Walmir Marques. |
| The purpose of the current study was to evaluate the lumber quality of Eucalyptus dunnii and Araucaria angustifolia thereupon air drying, in two different methods of stacking, traditional and triangular. To this purpose, 120 boards were used, being 60 for each species. The material was manipulated in the Rabaiolli lumberyard, located in municipality of Xanxerê, Santa Catarina. It was stacked in the traditional and triangular way, with 30 boards for each repetition. The boards had length dimensions of 150 cm, width of 15 to 35 cm and thickness of 2.5 cm. The boards quality analysis was based on the evaluation of warping defects, after the pit sawing and the end of drying by the biggest arrow, in mm. Additionally, it was verified the presence of top cracks,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Defects; Stacking; Quality of wood.. |
| Ano: 2017 |
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/14024 |
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| Talgatti, Maiara; Silveira, Amanda Grassmann da; Baldin, Talita; Souza, Joel Telles de; Santini, Elio José. |
| Objetivou-se verificar o comportamento da madeira serrada de clones de eucalipto durante o processo de secagem ao ar livre, a fim de subsidiar a classificação fenotípica para seleção genética, por meio da avaliação da qualidade da madeira. Para tal, foram utilizadas 15 tábuas de 2,5 x 10,0 x 1,2 cm, de cada clone para o processo de secagem ao ar livre, após foi realizada a avaliação dos defeitos de secagem, adicionalmente, e com isso verificado o índice de rachaduras de topo em tora. Já para a determinação dos coeficientes de contração lineares, contração máxima volumétrica e coeficiente de anisotropia, foram utilizados 30 corpos de prova com dimensões 2,0 x 2,0 x 10,0 cm por clone. O clone 1007 apresentou a maior taxa de secagem e também foi considerado o... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Defeitos da madeira serrada; Madeira de eucalipto; Umidade.. |
| Ano: 2018 |
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/19299 |
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| Talgatti, Maiara; Silveira, Amanda Grassmann da; Santini, Elio Jose; Gorski, Luciane; Baldin, Talita; Valcorte, Guilherme. |
| A clonagem do eucalipto vem promovendo a homogeneização das propriedades tecnológicas da madeira, aumentando a produtividade e diminuindo o ciclo de corte. Torna-se importante a investigação das propriedades físicas e mecânicas das madeiras destes clones para indicar a aplicação final mais adequada. O objetivo deste trabalho foi determinar propriedades físicas e mecânicas importantes para o uso da madeira de 6 clone do gênero Eucalyptus provenientes de plantios clonais de três estados do Brasil. O material foi coletado ao acaso, de cada clone foram amostradas 6 árvores, desdobradas e confeccionados os corpos de prova, com base nas normas ASTM, NBR e FN, para determinação da densidade básica, densidade aparente, contração (radial, tangencial, longitudinal e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Híbridos; Características físicas; Resistência mecânica; Qualidade da madeira. |
| Ano: 2019 |
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/20294 |
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