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theses performances of the construction system and enable the reduced usage of other materials. According to Luamkanchanaphan et al. (2012), thermal and acoustic comfort are related to density of the panel: higher density leads to higher thermal conductivity. In insulation materials, heat transfers occur in the materials and voids filled with air. CONCLUSIONS 1. The pore size distribution for oriented strand board specimens OSB 2 and OSB 3 indicated a large presence of macropores in the microstructure of the panels, contributing to a higher total porosity. This could be related to panel manufactured, as well as, microstructure of wood. 2. The OSB produced with Schizolobium amazonicum and castor oil polyurethane resin showed higher total porosity in the process conditions used in this study. 3. The commercial OSB found in the Brazilian market showed smaller structural porosity. REFERENCES CITED Abell, A. B., Willis, K. L., and Lange, D. A. (1999). “Mercury intrusion porosimetry and image analysis of cement- based materials,” Journal of Colloid and Interface Science 211(1), 39-44. DOI: 10.1006/jcis.1998.5986 Amaral, D. (2014). “ Anatochemistry of Pinus elliottii var. Elliottii ,” Ph.D. Dissertation, Federal University of Paraná, Brazil. ( in Portuguese ) Bertolini, M. S. (2014). Wood Waste and Tire Rubber Panels Associated with Castor- based Polyurethane Foam for Application as a Thermo-Acoustic Composite , Ph.D. Dissertation, University of São Paulo, São Carlos, Brazil. ( in Portuguese ) Bertolini, M. S. Nascimento, M. F., Christoforo, A. L., and Lahr, F. A. R. (2014). “Particle boards from Pinus sp. treated with CCA preservatives and biomass-derived resin,” Revista Árvore 38, 339-346. DOI: 10.1590/S0100-67622014000200014 ( in Portuguese ) Bertolini, M. S., de Morais, C. A. G., Christoforo, A. L., Bertoli, S. R., Santos, W. N., and Lahr, F. A. R. (2019). “ Acoustic absorption and thermal insulation of wood panels: Influence of porosity ,” BioResources 14(2), 3746-3757. DOI: 10.15376/biores.14.2.3746-3757 EN 300 (2006). “Oriented strand boards (OSB) – Definitions, classification and specifications,” European Committee for Standardization, Brussels, Belgium. Ferro, F. S. (2015). Oriented Particle Boards (OSB) with Alternative Inputs: Technical Feasibility and Proposal for Improving Environmental Performance , Ph.D. Dissertation, University of São Paulo, São Carlos, Brazil. ( in Portuguese ) Gonzalez-Garcia, S. Dias, A. C., Feijoo, G., Moreira, M. T., and Arroja, L. (2014). “Divergences on the environmental impact associated to the production of maritime pine wood in Europe: French and Portuguese case studies,” Science of the Total Environment 472, 324-337. DOI: 10.1016/j.scitotenv.2013.11.034
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Ferro et al . (20 21). “Strandboard Hg porosimetry,” B io R esources 16(4), 6661-6668.
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