Abstract
The aim was to evaluate the performance of laminated timber (GLULAM) of Schizolobium parahyba var. amazonicum (paricá) reinforced with fiber of glass or carbon glued with resorcinol adhesive through static bending, shear and tension parallel and perpendicular-to-grain and glued line tests and compare the experimental results with analytical ones. The bending test was divided in 5 treatments (T) composed by 6 test specimens, being T1 the control without fiber reinforcement, T2 with fiberglass of 110 g∙m -2 from grammage, T3 with fiberglass of 200 g∙m -2 , T4 with fiberglass of 330 g∙m -2 ; and T5 with carbon fiber of 200 g∙m -2 . The Longitudinal Modulus of Elasticity – MOE of bending test was obtained by analytical and experimental designs. The results were analyzed by Tukey’s test with 5% of significance. There were not a significant increase of the MOE value and the bending strength, of tensile or shear strength in the glued line for all treatments. The analytical design results in displacements significant lower than the experimental. The resorcinol adhesive had a satisfactorily bending performance without ruptures by tension parallel and perpendicular-to-grain or shear.
Highlights
Glued Laminated Timber (GLULAM) is a product made by laminated timbers glued one over the other and its using is applicable in several types of construction
When comparing the reinforced treatments with T1, the greatest increases in characteristic strength were for T4, followed by T2 and T3
The values of moisture content, basic and bulk density show that the timber of this research was fit to using at GLULAM beams as suggested by Terezo and Szücs (2010) e Ajdinaj and Habipi (2015)
Summary
Glued Laminated Timber (GLULAM) is a product made by laminated timbers glued one over the other and its using is applicable in several types of construction. The brazilian production of GLULAM uses mostly Pinus and Eucalyptus wood species. The researches with these two species are more profound and discussed. The GLULAM of paricá wood is gaining prominence at the scientific areas. Amazonicum (Huber ex Ducke) Barneby) presents compatible values to the GLULAM production (ALMEIDA et al, 2013; TEREZO et al, 2015; AJDINAJ; HABIPI, 2015). Studies evaluated the properties of paricá for structural usage and obtained positive results with GLULAM beams with different types of adhesives (TEREZO; SZÜCS, 2010; ALMEIDA et al, 2013; TEREZO et al, 2015)
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