Avaliação sobre a diferença de propriedades mecânicas do cerne e do alburno de mesmas espécies de madeira

Abstract

In this research were used three kinds of wood: two hardwoods and one softwood. The main purpose was evaluating the difference between heartwood and sapwood mechanical properties in each kind of wood. In the experiments were performed tests of parallel compression to fibers, according NBR 7190/97; in the normal compression test and the simple bending tests were necessary some adaptations. As result, it can be noted that the difference between mechanical resistances of heartwood and sapwood in a same species is not relevant to classify it as first class wood, without adopt the methodology established by Brazilian Standard NBR 7190/97.