Eficiência da colagem de madeira tratada de Eucalyptus cloeziana F. Muell para produção de madeira laminada colada (MLC)

Segundinho, Pedro Gutemberg de Alcântara; Gonçalves, Fabrício Gomes; Gava, Geanine Costa; Tinti, Vinícius Peixoto; Alves, Sabrina Daré; Regazzi, Adair José

doi:10.1590/s1517-707620170002.0140

Cited by 19 publications

(15 citation statements)

References 10 publications

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“…Values of compressive strength parallel to grain, tensile strength normal to grain and conventional strength on static bending test were lightly different from those published by Institute for Technological Research (Instituto de Pesquisas Tecnológicas -IPT) 29 . This can be explained by wood is a biological origin material, with certain variability of their physical and mechanical properties within same species depending on batches 30 .…”

Section: Caixetamentioning

confidence: 99%

Influence of treatment with water-soluble CCB preservative on the physical-mechanical properties of brazilian tropical timber

et al. 2019

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This aim of this work is to present an analysis of the influence of impregnation against biological demand, realized with saline solution of CCB (Chromated Copper Borate preservative) by vacuumpressure process, on physical-mechanical properties of tropical wood species Simarouba sp., Cedrelinga catenaeformis and Erisma uncinatum Warm. In theory, such process could increase the number of surface defects in wood pieces and reduce its strength properties. To investigate this influence, the complete species characterization was carried out in two conditions (without treatment and CCB treated wood). Tukey's multiple comparisons test (5% significance level) was applied. In addition, scanning electron microscopy (SEM) photomicrographs were obtained with the energy dispersive spectroscopy (EDS) to investigate preservative presence at the cellular level. Results permitted to conclude that CCB impregnation process did not affect physical-mechanical properties of the studied species.

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Section: Caixetamentioning

confidence: 99%

Influence of treatment with water-soluble CCB preservative on the physical-mechanical properties of brazilian tropical timber

et al. 2019

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“…After technological improvement combined with industrialization process, wood began to be benefited so that its shortcomings would be mitigated and its qualities enhanced. In this context, glued laminated timber (GLT) has arisen, which is a wood product formed by wooden boards glued together with different types of adhesives (Segundinho et al, 2017;Terezo et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Construction and Testing of Glued Laminated Timber Frames for Use in Laying Poultry Houses

Stringari

Petrauski

et al. 2020

Eng. Agríc.

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This study aimed to present a solution in glued laminated timber to replace frame structures built in reinforced concrete and metallic structure, which are common in agricultural buildings in western Paraná such as those destined to laying poultry house building by agricultural cooperatives. Structural behavior of frames build from Araucaria angustifolia glued boards and vegetable oil-based polyurethane adhesive was evaluated. Tests were carried out to characterize wood and adhesive to obtain verification/sizing parameters. Initially, a full-scale structural project was conducted to meet standard laying poultry house specifications. Afterwards, five units of straight three-articulated frames on a 1:2.5 reduced scale were designed, built, and subjected to strength tests until breaking. They were built with a 2-meter free span and a 15° slope, suitable for using metal roof tiles. The average for structure ultimate strength was 4.14 times the design load. Structures had satisfactory mechanical performance and displacements lower than those recommended by NBR 7190 (1997) standard (ABNT). Therefore, building glued frames with Parana pine boards and vegetable oil-based glue is technically feasible.

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“…Na sua forma maciça e em dimensões maiores, a madeira tornou-se, ao decorrer dos anos, um material difícil de ser encontrado devido à constante supressão de florestas nativas e à legislação ambiental vigente. Assim, os setores que a utilizam buscaram novas alternativas para um aproveitamento mais racional e que pudessem diminuir suas limitações de uso, a exemplo da produção dos painéis reconstituídos de madeira, como compensados, aglomerados de partículas, sarrafeados, MLC (Madeira Laminada Colada), entre outros (SEGUNDINHO et al, 2017;ANDRADE et al, 2018;PINATI et al, 2018).…”

Section: Introductionunclassified

Qualidade Da Madeira De Hevea Brasiliensis Visando a Produção De Celulose E Papel

Faria¹,

Santos²,

Furtini³

et al. 2019

Agrarian

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RESUMO O objetivo deste trabalho foi avaliar a espécie madeireira Hevea brasiliensis (seringueira) visando o uso para a fabricação de celulose e papel. Foram cortadas três árvores do clone Pb 235. Obteve-se discos das posições 0, 25, 50, 75 e 100% da altura comercial. Foi realizada análise química, física e anatômica da madeira. A espécie apresentou valores médios de holocelulose de 80,83%, compatível com a madeira de Eucalipto tradicionalmente empregada na produção de celulose e papel. Em relação aos valores obtidos de dimensão média das fibras (comprimento, largura, diâmetro do lume e espessura da parede), estes foram próximos aos encontrados na literatura. Com relação ao Índice de Runkel, foi possível classificar a fibra de Hevea brasiliensis como boa para fabricação de papel, mas com relação à Fração Parede, a fibra se encontra acima do limite. Já para coeficiente de flexibilidade, o mesmo encontra-se abaixo do recomendado e o índice de enfeltramento encontra-se na faixa ideal. A densidade básica média obtida foi de 0,541 g/cm³, valor próximo ao encontrado na literatura, o que possibilitou a sua classificação como madeira de média densidade. Após análise dos resultados foi possível considerar a madeira de Hevea brasiliensis como uma espécie promissora para fabricação de celulose e papel. PALAVRAS-CHAVE: Componentes químicos e anatômicos; Polpa celulósica; Polpação.

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Eficiência da colagem de madeira tratada de Eucalyptus cloeziana F. Muell para produção de madeira laminada colada (MLC)

Cited by 19 publications

References 10 publications

Influence of treatment with water-soluble CCB preservative on the physical-mechanical properties of brazilian tropical timber

Influence of treatment with water-soluble CCB preservative on the physical-mechanical properties of brazilian tropical timber

Construction and Testing of Glued Laminated Timber Frames for Use in Laying Poultry Houses

Qualidade Da Madeira De Hevea Brasiliensis Visando a Produção De Celulose E Papel

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