Evaluation of Quality in the Adhesion of Glued Laminated Timber (Glulam) of Paricá and Lyptus Wood Species

Abstract

This research aims to study the shear strength of species-adhesive-moisture-waterproofing combinations and delamination of Glued Laminated Timber (Glulam) made with Paricá (Schizolobium amazonicum Herb) and Lyptus Wood species, using two different adhesives, the bicomponent resorcinol-formaldehyde based adhesive (CASCOPHEN RS-216-M) with catalyst FM-60-M and the bicomponent melamine-urea based adhesive with catalyst AkzoNobel MUF 1242/2542, both in a proportion of 100 parts/adhesive mass and 20 parts/catalyst mass and waterproofed by the commercial product ProtectGuard. Shear strength tests in adhesion line were performed according to North American Standard AITC 190: 2007 and delamination tests were carried out obeying Canadian Code CSA 0177: 2006. The results show that average values of great shear strength were obtained in tests on the glue line of the specimens treated with the waterproofer, however, within them, the timber was dry. Lyptus Glulam beams did not present a performance in delamination that was compatible to external applications, but Paricá beams are fit to this use, once they are previously treated.

Field Performance of Glued Laminated Timber (Glulam) Manufactured from Thin Treated Lamina

“…The delamination tests of these glulam beams were probably indicative of their suitability for use in outdoor environment. Delamination rate exceeding 1% would indicate unsuitability of outdoor application (Henrique de Almeida et al 2014). The field test outcomes after 12 years of outdoor exposure were in agreement with the results of block shear tests and delamination tests.…”

Numerical Modelling and Experimental Testing on Polyurethane Adhesively Bonded Joints Behaviour in Wood-Wood and Wood-Carbon Fibre Reinforced Polymer Layouts

“…Gereke et al [6] carried out numerical analyses of a similar lap joint in a glue laminated timber. Almeida et al [7] and Cavalheiro et al [8] tested a maximal shearing stress on the specimens composed of three elements, in a double-lap configuration -as shown in Figure 1b. Rudawska et.…”

“…Two criteria for damage initiation are available in the Simulia ABAQUS software [46] -maximal stress Maxs and quadratic Quads (7).…”

Adding Value to Low-value Eucalyptus Wood by Glulam Production: Evaluation and Prediction of Its Properties by Non- Destructive Tool

“…Several Eucalyptus species have been studied as possible raw material for structural elements of glued laminated timber (glulam) (Calil Neto et al 2014; Almeida et al 2014;Segundinho et al 2017;Chiniforush et al 2019). Recently, the main objective of current research has been to broaden the potential of commercially available hardwood species as a raw material for the manufacturing of glulam due to their mid-range density (0.45 to 0.75 g.cm − 3 ), bending strength and modulus of elasticity (MOE) that are higher or comparable to those of commonly used softwoods, as well as distinct colors and natural patterns (Aicher et al 2018; Kovryga et al 2019; Morin-Bernard et al 2020).…”