ACCELERATED LABORATORY TEST OF RUBBERWOOD ORIENTED STRANDBOARD EXPOSED TO WOOD DECAY FUNGI
DOI:
https://doi.org/10.5902/19805098889Keywords:
natural durability, xilophagous fungi, Hevea brasiliensis, OSB.Abstract
This work aimed to evaluate the natural durability of oriented strandboards (OSB) manufactured with strands of Hevea brasiliensis Müll.Arg. bonded with 5% and 8% of urea-formaldehyde (UF) and phenol-formadehyde (FF) resins, exposed to xilophagous fungi under laboratory conditions. In accelerated laboratory test decay, samples of OSB were exposed to the following fungi: the brown-rot fungi Gloeophyllum trabeum (Pers. ex Fries) Murr., Coniophora puteana (Schumach. : Fr.)P. Karst., Meruliporia incrassata (Berk. & M.A. Curtis) Murrill as well as the white-rot fungi Fomes annosus (Fr. : Fr.) Cooke, Trametes versicolor (L. : Fr.) Pilát, Ganoderma applanatum (Pers.) Pat., Bjerkandera fumosa (Pers. : Fr.) P. Karst. and Phanerochaete chrysosporium Burds. Among the brown-rot fungi, the Gloeophyllum trabeum was the most aggressive, showing the highest loss of mass. Trametes versicolor and Ganoderma applanatum confirmed the preference for broadleave species. All oriented strandboards at lower UF resin contents were more degraded by Phanerochaete chrysosporium, Trametes versicolor, Ganoderma applanatum, Merulia incrassata, Coniophora puteana and Gloeophyllum trabeum, with high rate of loss of mass. Coniophora puteana showed small loss of mass when FF resin was applied. Bjerkandera fumosa showed low loss of mass only at higher resin content. Oriented strandboards exposed to Coniophora puteana showed insignificant OSB degradation.
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References
AMERICAN SOCIETY FOR TESTING AND MATERIALS- ASTM D 2017. Standard method of accelerated laboratory test of natural decay resistance of woods. Annual Book of ASTM Standard. Philadelphia, v. 0410. 2005.
AZIZOL, A. K.; RAHIM, S. Carbohydrates in rubberwood (Hevea brasiliensis Muell Arg.) Holzforschung, Berlin, v. 43, n. 3, p. 173-178, Jan 1989.
CRAIG, L. S. et al. Annosus root disease of Western Conifers. Forest Service. U.S. Department of Agriculture, 2000, 9 p. (Forest Insect & Diseases Leaflet, 172)
EATON, R. A.; HALE, M. D. C. Wood: decay, pests and protection. Cambridge: Chapman & Hall, 1993. 541 p.
ENCINAS, O., DANIEL, G. Degradation of the gelatinous layer in aspen and rubberwood by the blue stain fungus Lasiodiplodia theobromae. IAWA Journal, Leiden, v.18, p.107-115, 1997.
HONG, L. T. et al. Durability of rubberwood. In: Hong, L. T.; Lim, S. C. (Eds.). Rubberwood processing and utilization. Kuala Lumpur: Forest research Institute of Malaysia, p.37-50, 1994.
JUSOH, I.; KAMDEM. D. P. Laboratory evaluation of natural decay resistance and efficacy of CCA-treated rubberwood (Hevea brasiliensis Muell. Arg.). Holzforschung, Berlin, v. 55, n. 3, p. 250-254, Apr. 2001.
KARTAL, S. N.; GREEN III, F. Decay and termite resistance of medium density fiberboard (MDF) made from different wood species. International Biodeterioration & Biodegradation, Birmingham, v. 51, p. 29-35, 2003.
OKINO, E. Y. A. et al. Color variation of rubberwood clones and cypress infected by Gloeophyllum striatum and Phanerochaete chrysosporium. International Biodeterioration & Biodegradation, Birmingham, v. 63, p. 41-45, 2009.
OKINO, E. Y. A. et al. Biodegradação de chapas de partículas orientadas de pinus, eucalipto e cipreste expostas a quatro fungos apodrecedores. Scientia Forestalis, Piracicaba, n. 74, p. 67-74, 2007.
OKINO, E. Y. A. et al. Propriedades de chapas OSB com espécies de madeira de florestas plantadas no Brasil: strands de 80 mm de Hevea brasiliensis. In: CONGRESSO BRASILEIRO DE INDUSTRIALIZAÇÃO DA MADEIRA - PRODUTOS DE BASE FLORESTAL, 2., 2006, Curitiba. Anais...Curitiba, 2006, 10 p.
OKINO, E. Y. A. et al. Propriedades físicas, mecânicas e durabilidade natural de chapas aglomeradas de Hevea brasiliensis Müell Arg. In: CONGRESSO FLORESTAL BRASILEIRO, 8., 2003, São Paulo. Anais...São Paulo, 2003, Pôster n. 324.
OKINO, E. Y. A. et al. Durabilidade natural de madeira sólida, de chapas aglomeradas e de chapas de cimento-madeira de Hevea brasiliensis. Brasil Florestal, Brasília, v. 73, p. 39-46, 2002.
SANTANA, M. A. E.; EIRAS, K. M. M. Madeira de Hevea brasiliensis: adequação tecnológica para sua utilização. Brasília: IBAMA/DIGET, 1999. 90 p. (Relatório Interno).
SUJAN, A. et al. Some studies on fungal deterioration of rubberwood (Hevea brasiliensis). International Research Group on Wood Preservation, 1980, 9 p. (Document N. IRG/WP/2140).
WALTHER, T. et al. Strength, decay and termite resistance of oriented kenaf fiberboards. J. Wood Sci, Japan, v. 53, p. 481-486, 2007.
YAMAMOTO, K.; HONG, L. T. A laboratory method for predicting the durability of tropical hardwoods. Japan Agricultural Research Quaterly, Japan, v. 28, p. 268-275, 1994.
