Properties of cross-laminated oriented bamboo scrimber board (CL-OBSB)

• Published in: Bioresources Vol. 18; no. 1; pp. 1141 - 1154
• Main Authors: Chung, Min-Jay, Wang, Sheng-Yang
• Format: Journal Article
• Language: English
• Published: Raleigh North Carolina State University 01.02.2023
• Subjects: Bamboo; Bonding strength; Compressive strength; Configurations; Construction; Cross laminating; cross-laminated oriented bamboo scrimber board (cl-obsb); Dimensional stability; Flooring; Hardwoods; Load; Mechanical properties; Modulus of rupture; Nondestructive testing; Physical properties; Raw materials; Stability tests; Statistical analysis; Storage modulus; Variance analysis; Velocity; Water absorption; Wave velocity; Wood composites; Japan; Taiwan
• ISSN: 1930-2126; 1930-2126
• DOI: 10.15376/biores.18.1.1141-1154

Physical and mechanical properties were evaluated for cross-laminated oriented bamboo scrimber board (CL-OBSB). Results of non-destructive testing revealed a linear relationship of parallel grain content with ultrasonic-wave velocity, dynamic modulus of elasticity (DMOEu), tap-tone velocity, and DMOEt values. In terms of the ratio of parallel grain, CL-OBSB 80%(//) possessed the highest modulus of elasticity and modulus of rupture values along with the greatest strength. The high grain content compressed in a parallel direction contributed to superior strength performance. Regarding the perpendicular compressive (C┴) strength, because both the CL-OBSB 40%(//) configuration and CL-OBSB have a mid-layer consisting of 60% parallel grain, CL-OBSB 40%(//) holds the largest C┴ value. Furthermore, the shear bond strength (S) showed that the S// value was 1.03 times that of the S┴ value with a wood failure frequency of 97%. After the dimensional stability test, the water absorption and volumetric swelling of the four CL-OBSB types ranged between 15.3% and 17.7% and 9.5% to 10.6%, respectively. In conclusion, the orthogonal configuration of CL-OBSBs can improve balance expansion and contraction in different directions, thus increasing its dimensional stability.