Avaliação da resistência mecânica e influência na cor da madeira de Pinus sp. sob a ação de intempéries

Abstract

Reducing the availability of native timber increases demand for timber from planted forests, such as Pinus sp. This, research on its preservation against the action of weathering and biodegradation agents are important, thus seeking a greater durability of the material. The present work had the objective of evaluating the weathering action on Pinus sp. The methodology used for the study was initiated from the introduction of slides of Pinus sp. In the soil, up to half its length. The samples consist of turned slides of Pinus sp. With dimensions of approximately 185mm leng x 25mm widt x 2mm thick. The product used for the treatment of the slides was the stain, a water-repellent transparent impregnant, applied by brushing towards the fibers of the previously cleaned wood. The treated slides presented different behaviors among the colorimetric parameters, with the exception of luminosity. The modulus of elasticity, obtained by static bending test, also showed a smaller decrease with time for the treated samples.