FABRICAÇÃO DE CHAPAS DE PARTÍCULAS AGLOMERADAS USANDO GESSO COMO MATERIAL CIMENTANTE

Haselein, Clovis Roberto; Calegari, Leandro; Alberti, Luis Fernando; Minello, Adriano Luiz; Silva, Paulo Anaximandro da; Pintos, Rossina Gabriela Figueredo

doi:10.5902/198050981703

RESUMO

Neste trabalho, foram confeccionadas chapas aglomeradas, utilizando gesso como material cimentante e papel reciclável dissociado (jornal e offset) e partículas de madeira de pinus como reforços. Em todos os tratamentos, a razão madeira (ou fibras) para gesso foi mantida em 0,25 (base seca) e duas dosagens de água (w) foram empregadas: 0,4 e 0,8, correspondendo à razão água:gesso. As chapas foram prensadas a frio em prensa de laboratório, em um processo similar à produção de chapas aglomeradas convencionais. Após condicionadas em câmara climatizada, as chapas foram testadas em flexão está tica, dureza, arrancamento de parafusos, absorção d’água e inchamento em espessura. Em geral, a adição de fibras causou melhoria nas propriedades das chapas. Diferenças estatísticas significativas em relação à testemunha (gesso puro) foram encontradas para resistência à flexão está tica (MOR), dureza e arrancamento de parafusos em relação a alguns dos tratamentos estudados. Já a inclusão de fibras de papel reciclável, com w = 0,4, não apresentou diferenças significativas em relação à testemunha para absorção d’água e inchamento em espessura. Os melhores resultados foram encontrados com papel jornal, com um coeficiente w = 0,4.

Palavras-chave:
chapas gesso/madeira; madeira de pinus; papel reciclável

ABSTRACT

In this work, gypsum bonded particleboards were manufactured using recycled paper (newspaper and offset) and pine wood particles. In all treatments the ratio wood/gypsum was kept in 0.25 (ovendry base) and two water content (w) were employed: 0.4 and 0.8, corresponding to the water/gypsum ratio. The boards were cold pressed in laboratory in a process similar to the conventional particlebo ard fabrication. Then, they were tested in static bending, hardness, screw withdrawal and thickness swelling. In general, the addition of fibers improved the board properties. Significant differences were found for some of the treatments for static bending strength, hardness and screw withdrawal, while the inclusion of paper recycled fibers with w = 0,4 did not show differences for water absorption and thickness swelling, when compared to conventional gypsum boards. The best results were obtained when newspaper type recyclable fibers were introduced, with w = 0,4.

Key words:
gypsum particleboard; pine wood; recycled paper

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REFERÊNCIAS BIBLIOGRÁFICAS

AMERICAN SOCIETY FOR TESTING AND MATERIALS. ASTM D1037. Evaluating the properties of wood-base fiber and particle panel materials. Philadelphia, Pa. 1995.
BAUER, L.A.F. Materiais de construção. 5.ed. Rio de Janeiro: LTC Ed., 1994. v.1.
DENG, Y.H.; FURUNO, T.; UEHARA, T. Improvement on the properties of gypsum particleboard by adding cement. Journal of Wood Science, v. 44, n. 2, p .98-102, 1998.
DOBROWOLSKA, E.; TROGER, F. Fire behavior of gypsum-bonded particleboards. Holz-als-Roh-und Werkstoff, v. 54, n. 3, p .163-169, 1996.
DUDA, A.; HILBERT, T. Development of the gypsum matrix structure in gypsum-bonded particleboards. WKI-Mitteilung, n. 511, p. 1-7, 1990.
FELTON, C.C.; DE GROOT, R.C. The recycling potential of preservative-treated wood. Forest Products Journal, v. 46, n. 7/8, p.37-46, 1996.
FUJITA, T; KOMATSU, N.; KAWAI, S. Manufacture and properties of Gypsum-bonded particleboard I. Effect of press time, water-gypsum hemihydrate ratio and resin content on board properties. Mokuzai Gakkaishi, v. 47, n. 2, p.120-128, 2001.
GOTZE, M.; HEMPEL, R.; TAUSCH, K.H. Investigations into the durability of moisture-resistant gypsum wallboard during alternating exposure to heat and moisture. Zement-kalk-gips, v. 48, n. 10, p.555-565, 1995.
GREXA, O. Flame retardant treated wood products. In: WOOD & FIRE SAFETY, 2000 (partI), Strbské Pleso (Slovak Republic). Anais... Strbské Pleso: Techniká Univerzitavo Zvolene, 2000. p. 101-110
HERNÁNDEZ-OLIVARES, F. et al. Development of cork-gypsum composites for building applications. Construction and building materials, n. 13, p.179-186, 1999.
INCE, P.J.; McKEEVER, D.B. Recovery of paper and wood for recycling: Actual and Potential. Madison: United States Department of Agriculture, Forest Service, Forest Products Laboratory. 1994. 11p. (General Techinical Report FPL-GTR-88)
LATORRACA, J.V.F. Estudo da viabilidade do uso da espécie Eucalyptus dunii (Maid) na manufatura de painéis de madeira-cimento. 1996. 94p. Dissertação (Mestrado) - Universidade Federal do Paraná, Curitiba. 1996.
LEMPFER, K.; HILBERT, T.; GUNZERODT, H. Development of gypsum particleboard manufacture in Europe. Forests Products Journal, v. 40, n. 6, p. 37-40, 1990.
MARI, E.L.; PABLO, J.M.V.; PABLO, A.A. Production of gypsum-bonded panels from cocowood (Cocos nucifera L.). FPRDI-Journal. v. 20, n. 1-2, p. 73-82, 1991.
MATTONE, R. Comparison between gypsum panels reinforced with vegetable fibers: their behavior in bending and under impact. In: VEGETABLE PLANTS AND THEIR FIBBERS AS BUILDINGS. MATERIALS. RILEM, 1990, Salvador. Anais... Salvador: [s.n.], 1990. p. 161-172
OKINO, E.Y.A.; ANDAHUR, M.A.E.S.; SOUZA, M.R. Resistência físico-mecânica de chapas aglomeradas de bagaço de cana-de-açúcar modificado quimicamente. Scientia Forestalis, n. 52, p. 35-42, 1997.
RAHIM-S, A.; KHOZIRAH, S.; KHOZIRAH, S. Effect of wood/gypsum ratio and density on strength properties of gypsum-bonded particleboard from oil palm stems. Journal of Tropical Forest Science, v. 4, n. 1, p. 80-86, 1991.
PASANEN, A. et al. Fungal growth and survival in building materials under fluctuating moisture and temperature conditions. International Biodeterioration and Biodegradation, n. 46, p. 117-127, 2000.
SAVASTANO Jr., H.; WARDEN, P.G.; COUTTS, R.S.P. Ground iron blast as a matrix for cellulosecement materials. Cement &Concrete Composites, n. 23, p. 389-397, 2001.
SIMATUPANG, M.A.H.; SCHMITT, U. Wood extractives of rubberwood (Hevea brasiliensis) and their influences on the setting of the inorganic binder in gypsum-bonded particleboards. Journal of Tropical Forest Science , v.6, n. 3, p. 269-285, 1994.
TEIXEIRA, D. E.; GUIMARÃES, T. L. Tratamento de partículas de Acácia mearnsii De Wild. para produção de chapas de cimento-madeira. Brasília: Laboratório de Produtos Florestais, IBAMA, 1989. 9p. (Série Técnica, 11)
THOLE, V.; WEISS, D. Suitability of annual plants as additives for gypsum-bonded particleboards. Holzals Roh und Werkstoff, v. 50, n. 6, p. 241-252, 1992.
VALDES, J.L. et al. Bagasso-gypsum boards: preliminary study of the process. Rev. ICDCA, v. 22, n. 3, p.34-82, 1989.
ZHANG, Y. Influence of wood extractive on hardening and properties of gypsum plaster and gypsum bonded particleboard. Wood Industry, Beijing, 1990.

Datas de Publicação

Publicação nesta coleção
Jan-Jun 2002

Este é um artigo publicado em acesso aberto sob uma licença Creative Commons

[1] AMERICAN SOCIETY FOR TESTING AND MATERIALS. ASTM D1037. Evaluating the properties of wood-base fiber and particle panel materials. Philadelphia, Pa. 1995.

[2] BAUER, L.A.F. Materiais de construção. 5.ed. Rio de Janeiro: LTC Ed., 1994. v.1.

[3] DENG, Y.H.; FURUNO, T.; UEHARA, T. Improvement on the properties of gypsum particleboard by adding cement. Journal of Wood Science, v. 44, n. 2, p .98-102, 1998.

[4] DOBROWOLSKA, E.; TROGER, F. Fire behavior of gypsum-bonded particleboards. Holz-als-Roh-und Werkstoff, v. 54, n. 3, p .163-169, 1996.

[5] DUDA, A.; HILBERT, T. Development of the gypsum matrix structure in gypsum-bonded particleboards. WKI-Mitteilung, n. 511, p. 1-7, 1990.

[6] FELTON, C.C.; DE GROOT, R.C. The recycling potential of preservative-treated wood. Forest Products Journal, v. 46, n. 7/8, p.37-46, 1996.

[7] FUJITA, T; KOMATSU, N.; KAWAI, S. Manufacture and properties of Gypsum-bonded particleboard I. Effect of press time, water-gypsum hemihydrate ratio and resin content on board properties. Mokuzai Gakkaishi, v. 47, n. 2, p.120-128, 2001.

[8] GOTZE, M.; HEMPEL, R.; TAUSCH, K.H. Investigations into the durability of moisture-resistant gypsum wallboard during alternating exposure to heat and moisture. Zement-kalk-gips, v. 48, n. 10, p.555-565, 1995.

[9] GREXA, O. Flame retardant treated wood products. In: WOOD & FIRE SAFETY, 2000 (partI), Strbské Pleso (Slovak Republic). Anais... Strbské Pleso: Techniká Univerzitavo Zvolene, 2000. p. 101-110

[10] HERNÁNDEZ-OLIVARES, F. et al. Development of cork-gypsum composites for building applications. Construction and building materials, n. 13, p.179-186, 1999.

[11] INCE, P.J.; McKEEVER, D.B. Recovery of paper and wood for recycling: Actual and Potential. Madison: United States Department of Agriculture, Forest Service, Forest Products Laboratory. 1994. 11p. (General Techinical Report FPL-GTR-88)

[12] LATORRACA, J.V.F. Estudo da viabilidade do uso da espécie Eucalyptus dunii (Maid) na manufatura de painéis de madeira-cimento. 1996. 94p. Dissertação (Mestrado) - Universidade Federal do Paraná, Curitiba. 1996.

[13] LEMPFER, K.; HILBERT, T.; GUNZERODT, H. Development of gypsum particleboard manufacture in Europe. Forests Products Journal, v. 40, n. 6, p. 37-40, 1990.

[14] MARI, E.L.; PABLO, J.M.V.; PABLO, A.A. Production of gypsum-bonded panels from cocowood (Cocos nucifera L.). FPRDI-Journal. v. 20, n. 1-2, p. 73-82, 1991.

[15] MATTONE, R. Comparison between gypsum panels reinforced with vegetable fibers: their behavior in bending and under impact. In: VEGETABLE PLANTS AND THEIR FIBBERS AS BUILDINGS. MATERIALS. RILEM, 1990, Salvador. Anais... Salvador: [s.n.], 1990. p. 161-172

[16] OKINO, E.Y.A.; ANDAHUR, M.A.E.S.; SOUZA, M.R. Resistência físico-mecânica de chapas aglomeradas de bagaço de cana-de-açúcar modificado quimicamente. Scientia Forestalis, n. 52, p. 35-42, 1997.

[17] RAHIM-S, A.; KHOZIRAH, S.; KHOZIRAH, S. Effect of wood/gypsum ratio and density on strength properties of gypsum-bonded particleboard from oil palm stems. Journal of Tropical Forest Science, v. 4, n. 1, p. 80-86, 1991.

[18] PASANEN, A. et al. Fungal growth and survival in building materials under fluctuating moisture and temperature conditions. International Biodeterioration and Biodegradation, n. 46, p. 117-127, 2000.

[19] SAVASTANO Jr., H.; WARDEN, P.G.; COUTTS, R.S.P. Ground iron blast as a matrix for cellulosecement materials. Cement &Concrete Composites, n. 23, p. 389-397, 2001.

[20] SIMATUPANG, M.A.H.; SCHMITT, U. Wood extractives of rubberwood (Hevea brasiliensis) and their influences on the setting of the inorganic binder in gypsum-bonded particleboards. Journal of Tropical Forest Science , v.6, n. 3, p. 269-285, 1994.

[21] TEIXEIRA, D. E.; GUIMARÃES, T. L. Tratamento de partículas de Acácia mearnsii De Wild. para produção de chapas de cimento-madeira. Brasília: Laboratório de Produtos Florestais, IBAMA, 1989. 9p. (Série Técnica, 11)

[22] THOLE, V.; WEISS, D. Suitability of annual plants as additives for gypsum-bonded particleboards. Holzals Roh und Werkstoff, v. 50, n. 6, p. 241-252, 1992.

[23] VALDES, J.L. et al. Bagasso-gypsum boards: preliminary study of the process. Rev. ICDCA, v. 22, n. 3, p.34-82, 1989.

[24] ZHANG, Y. Influence of wood extractive on hardening and properties of gypsum plaster and gypsum bonded particleboard. Wood Industry, Beijing, 1990.

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