Mechanical tests on Corymbia citriodora battenboard panels coated and reinforced with giant bamboo veneers

Fabiano Ostapiv

doi:10.1590/1983-40632019v4953150

Abstract

ABSTRACT Dense wood batten panels usually break in the glue line when loaded. This study demonstrates that thin veneers obtained from mature culms of Dendrocalamus asper by mechanical grinding are suitable for coating and reinforcing solid processed eucalyptus wood and eucalyptus batten panels. Tensile and bending tests were carried out on Corymbia citriodora timber and edge glued batten panels, with and without bamboo veneer reinforcement. The tensile test results showed that the bamboo veneers glued onto the wood and edge glued batten panels specimens acted as a mechanical reinforcement for both cases, when submitted to tensile forces parallel to the bamboo fibers. In bending tests, the edge glued batten panels specimens were tested transversally to the glue line, direction in which the panel showed the lowest mechanical resistance. The edge glued batten panels specimens without reinforcement with laminated bamboo exhibited a fragile behavior and ruptured abruptly along the glue line. A significant increase in the mechanical strength of the set was observed for the edge glued batten panels coated with laminated bamboo. In addition, the mechanical behavior changed in reinforced specimens, which ruptured slowly and gradually in the bending tests.

Highlights

INTRODUCTIONBamboo is an important building material in modern engineering (Dunkelberg 1992) and bamboo culms and shoots have a vast potential in the development of economically and environmentally sustainable enterprises and supply chains (Hsiung 1987)
Bamboo is an important building material in modern engineering (Dunkelberg 1992) and bamboo culms and shoots have a vast potential in the development of economically and environmentally sustainable enterprises and supply chains (Hsiung 1987).According to Salamon (2009), the limited use of bamboo in the Brazilian industry is largely due to the lack of sufficient raw material and knowledge regarding bamboo manufacturing processes, as well as safe and efficient equipment.In most cases, natural bamboo culms do not meet industrial requirements and need to be standardized (Yu 2007)
This study focuses on normal tensile testing of high-density eucalyptus wood and static bending of eucalyptus edge glued panel (EGP), coated or not with giant bamboo veneers obtained by grinding on a lathe

Summary

INTRODUCTION

Bamboo is an important building material in modern engineering (Dunkelberg 1992) and bamboo culms and shoots have a vast potential in the development of economically and environmentally sustainable enterprises and supply chains (Hsiung 1987). According to Salamon (2009), the limited use of bamboo in the Brazilian industry is largely due to the lack of sufficient raw material and knowledge regarding bamboo manufacturing processes, as well as safe and efficient equipment. Natural bamboo culms do not meet industrial requirements and need to be standardized (Yu 2007). As reported by Zang et al (2002), in order to standardize the lignocellulosic material from bamboo culms, the culm must be processed into smaller units, such as veneers or chips, which can be used to obtain different industrial panels by applying adhesive and pressing. Moizés (2007) showed four basic types of standard industrial

Received

MATERIAL AND METHODS

RESULTS AND DISCUSSION

CONCLUSIONS