Work

Density, bending behavior, and interfacial characterization of glued-laminated Dendrocalamus asper bamboo produced using two manufacturing methodologies

Year: 2026

Type: article

Abstract: This study examines the structural and microstructural performance of Dendrocalamus asper laminates bonded with a castor-oil-based polyurethane adhesive, aiming to assess how two distinct milling methodologies through laminate rectification (RRLB) and partial preservation of culm curvature (RALB), influence their physical characteristics, mechanical properties, and the quality of the bonded interface. A total of 18 specimens were manufactured in accordance with ISO 23478 (2022) and ANSI/APA PRG 320 (2012) standards and subjected to apparent density measurements, four-point bending tests, and optical microscopy analysis. The results demonstrated satisfactory structural performance for both groups, with no statistically significant differences observed in flexural strength and stiffness at the 5% significance level, 101 MPa and 16.5 GPa for the RRLB and 93 MPa and 14.5 GPa for the RALB, respectively. Conversely, the RALB methodology yielded a 25% increase in lamina production efficiency, demonstrating superior raw-material utilization without compromising mechanical performance.

Source: Journal of Materials Research and Technology

DOI: 10.1016/j.jmrt.2026.08.044