Qualidade de pisos maciços de madeiras tropicais

Abstract

The present study was carried out with the objective of evaluating the quality of floors produced with wood of five tropical species: Dipteryx odorata (cumaru), Handroanthus spp. (ipê), Hymenaea courbaril (jatobá), Astronium lecointei (muiracatiara) and Bowdichia virgilioides (sucupira-preta). The floor samples were provided by the company Brasil Tropical Pisos, located in Alta Floresta, Mato Grosso, Brazil. The wood basic density was determined and was carried out the simulation of the behavior of floors in service. In the simulation tests were carried out the tests of impact of falling steel sphere, static and dynamic friction, indentation caused by loads applied in small areas, rolling loads and abrasiveness. The colorimetric characterization was also performed and the total extractives content in the wood of each evaluated species was determined. The results were submitted to variance analysis and when significant differences were established between them, Tukey's test was applied at a level of 5% of significance. Pearson correlation was performed between the results of basic density and simulation of the floors in service, and between colorimetric parameters and extractive content. As for the basic density, the woods of cumaru, ipê and jatobá were classified as heavy, and the woods of muiracatiara and sucupira-preta moderately heavy. According to the simulation of floor in service, cumaru and ipê fall into the high-quality class, jatobá and sucupira-preta in the intermediate quality class and muiracatiara in the low-quality class. There was a correlation between basic wood density and the simulation tests of the floors in service. In the colorimetric analysis, the wood floors of the species cumaru and sucupira-preta were characterized as light brown, muiracatiara as pink, Jatobá was framed in two classes, pink and yellow-brown and the color of ipê wood was characterized as olive. For extractive content, the results were higher than 8%. There was a correlation between colorimetric parameters and extractive content.