Painéis OSB de madeira Pinus sp. e adição de partículas de polipropileno biorientado (BOPP)
Data
2017-11-15
Autores
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Biblioteca Digital de Teses e Dissertações da USP
Universidade de São Paulo
Escola de Engenharia de São Carlos
Universidade de São Paulo
Escola de Engenharia de São Carlos
Resumo
Descrição
O setor da construção civil é um dos que mais consomem recursos naturais e utilizam energia de forma intensiva, gerando consideráveis impactos ambientais juntamente com grande quantidade de resíduos. A utilização de produtos alternativos como painéis de madeira surge como uma possibilidade de redução de tais impactos. O Oriented Strand Board, desenvolvido para substituir o painel compensado, tem conquistado cada vez mais espaço na construção apesar de sua menor estabilidade dimensional perante o seu antecessor. A adição de resíduos, como o plástico, na matriz constituinte destes painéis representa alternativa de reaproveitamento destes descartes e economia de madeira no processo produtivo destes compósitos, além de proporcionar melhoria nas propriedades físicas dos mesmos. O objetivo deste trabalho foi confirmar a viabilidade técnica da produção de painéis OSB de madeira de Pinus sp. com adição de proporções de 20 e 30% de partículas de polipropileno biorientado em sua matriz constituinte e resina poliuretana à base de óleo de mamona. A avaliação de desempenho foi feita por intermédio das propriedades físicas e mecânicas dos painéis, determinadas atendendo as recomendações da EN 300 (1999). Os painéis foram classificados como OSB 4, de acordo com as propriedades físicas avaliadas, e OSB 1, considerando os módulos de elasticidade e ruptura obtidos em ensaios de flexão estática. A adesão interna, para os painéis produzidos com os parâmetros de processo adotados, não alcançou os valores exigidos pela citada norma. De todas as propriedades avaliadas, apenas inchamento em espessura e absorção de água foram influenciadas pela porcentagem de BOPP. Assim, considera-se comprovada a viabilidade técnica da produção dos painéis OSB deste trabalho, para aplicação na construção civil.
Building construction is one of the sectors that most consuming natural resources and use energy intensively, generating considerable environmental impacts coupled with large amount of waste. Employing alternative product like wood panels comes as a possibility to reduce these impacts. Oriented Strand Board, developed to substitute the plywood panel, has gained more space in the construction spite of its lower dimensional stability against its predecessor. The addition of plastic waste in constitutive matrix of these panels represents an alternative to reuse this kind of waste and wood economy in the productive process of these composites, besides improving their physical properties. The aim of this study was to evaluate the technical feasibility of producing OSB of Pinus sp. wood with the addition of various proportions of particles of bioriented polypropylene in its constitutive matrix and polyurethane resin based on castor oil with evaluation of physical and mechanical properties of these panels. In accordance with EN 300 (1999), the OSB panels have been classified as 4 in accordance with the physical properties assessed and as OSB 1 for the elasticity modules and rupture. Property of internal bond not presented the minimum values required by the same standard. Of all properties evaluated, only thickness swelling and water absorption were influenced by the percentage of BOPP. However, it is considered completely evidenced the technical viability of production of the OSB of this work, and its potential employability in civil construction sector.
Building construction is one of the sectors that most consuming natural resources and use energy intensively, generating considerable environmental impacts coupled with large amount of waste. Employing alternative product like wood panels comes as a possibility to reduce these impacts. Oriented Strand Board, developed to substitute the plywood panel, has gained more space in the construction spite of its lower dimensional stability against its predecessor. The addition of plastic waste in constitutive matrix of these panels represents an alternative to reuse this kind of waste and wood economy in the productive process of these composites, besides improving their physical properties. The aim of this study was to evaluate the technical feasibility of producing OSB of Pinus sp. wood with the addition of various proportions of particles of bioriented polypropylene in its constitutive matrix and polyurethane resin based on castor oil with evaluation of physical and mechanical properties of these panels. In accordance with EN 300 (1999), the OSB panels have been classified as 4 in accordance with the physical properties assessed and as OSB 1 for the elasticity modules and rupture. Property of internal bond not presented the minimum values required by the same standard. Of all properties evaluated, only thickness swelling and water absorption were influenced by the percentage of BOPP. However, it is considered completely evidenced the technical viability of production of the OSB of this work, and its potential employability in civil construction sector.
Palavras-chave
BOPP, Oriented Strand Board, Propriedades físicas, Propriedades mecânicas, BOPP, Mechanical properties, Oriented Strand Board, Physical properties