Evaluación de las líneas de cola a tope lateral y finger joint en madera de Acacia Mangium Milld. Provenientes de Puerto Gaitán Meta

Abstract

The research addresses the evaluation of the performance of Acacia mangium Willd. wood by means of five types of treatments: vertical finger joint, horizontal finger joint, assembly of pieces with PVA adhesive, assembly of pieces with Carpincol adhesive and a solid piece of wood as a reference. The treatments, obtained previously elaborated, were subjected to static bending tests to obtain deformation data against load. Descriptive statistics were used to analyze the data, which were normalized using the Shapiro-Wilk test. A coefficient of variation adjustment was performed on the data in order to be within the ranges allowed by NSR-10 and a one-factor analysis of variance ANOVA was performed to identify significant differences between treatments. Since differences were found, a Tukey's post hoc test was performed to visualize the disparities between treatments and a Bartlett's test to verify homoscedasticity. The results indicate that the Finger Joint vertical (FV) treatment was consistently the most effective, followed by PVA on some variables. In contrast, Carpincol adhesive proved to be the least resistant adhesive and the horizontal Finger Joint, the treatment with the lowest values for the three (3) variables of importance (RLP, Rmax, E). Finally, a classification of the results was made taking into account the effectiveness of the treatment and its performance in the static bending test. It is relevant to note that this classification is based on the specific results of the static bending tests and the failure causes identified during the qualitative inspection.