Mechanical performance degradation of recycled glulam under simulated marine atmosphere

Abstract

• The physical properties of both specimens change most obviously after the end of the first salt spray stage. • The main failure mode of specimens under compression was not related to the location of the adhesive layer. • The prediction model of mechanical properties of recycled glulam under the influence of corrosion duration is established. • The compression constitutive model and shear constitutive model affected by corrosion duration are proposed. To utilize recycled glulam in coastal constructions, the physical and mechanical properties of original and aged recycled glulam under simulated marine atmosphere were experimentally studied. The results show that the physical properties of the recycled specimens change most obviously after the first salt spray stage (12 days). After salt spray corrosion, the main failure mode of the specimens under compression was oblique shear failure which is not related to the location of the adhesive layer, since no obvious failure happened in the bonding interface. Except for the ductility ratio, the mechanical properties of the recycled glulam decreased with the increase of salt spray corrosion duration (10–20 % and 15–25 % for compressive and shear strength degradation respectively after 48 days), especially the ones after the aging test showing more defects. The compression and shear constitutive models of recycled glulam affected by corrosion duration are proposed and validated by the test results.