Fabricação de madeira lamelada colada com Trattinnickia Burserifolia e Qualea spp.

Abstract

The The general objective of the research was to evaluate the fabrication and mechanical properties of MLC using native species, determining the modulus of elasticity and the flexural strength of glued laminated wood. Two species of wood that were available in the timber market in the region of Sinop were chosen, the species are Trattinnickia burserifolia (Amescla) and Qualea spp (Cambará). 25 lamellae were acquired for each species, which were already sawn and planed, with dimensions of 1500x100x20 mm (length, width and thickness). From these specimens of 200x100x20 mm were extracted from each coverslip to measure the moisture content. Moisture content was measured after obtaining bulk density and MOEd and MOEe tests. MOEd was obtained by means of ultrasound wave tests, using the PUNDITLAB ultrasonic wave transmission device. The MOEe of the lamellas was determined by the 3-point static bending test, and 3-point static bending and 4-point static bending tests were performed to determine the MOEe and maximum strength in the beam. The main results found for Amescla beams were densities of 475.46kg.m-3 and Cambará of 679.62 kg.cm-3, with moisture content of 9.12% and 10.15%, respectively. The results of this work show that the MOEd and MOEe presented different results between the methods and between the species, being the MOEd from 30% to 39% higher than the MOEe. The average value of MOEe in the Amescla beam was 6081 MPa and in Cambará it was 5728 MPa. The average results obtained in the beams of the Amescla species were MOEe side A of 5659.84 MPa, and side B 5796.11 MPa, and maximum strength was 22.01 MPa, and for the Cambará species it was MOEe side A of 6420.76 MPa and side B of 5742.19 MPa and for maximum strength it was 21.67 MPa. From the results obtained, it is observed that the wood of the species of Amescla and Cambará are raw materials with potential for the production of MLC.