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Effect of Different Veneer-joint Forms and Allocations on Mechanical Properties of Bamboo-bundle Laminated Veneer Lumber

Articles

Journal/Conference:

BIORESOURCES

Language:

English

Author:

Zhang Dan; Ren Wenhan

Experts:

Wang Ge

Year:

2014

Volume:

9

Issue:

2

Pages:

2689-2695

Keywords:

Bamboo-bundle laminated veneer lumber; Joint forms; Mechanical properties; Joint allocations

Bamboo-bundle laminated veneer lumber (BLVL) was produced by veneer lengthening technology. The objective of this study was to evaluate the effect of different veneer-joint forms and allocations on the mechanical properties of BLVL. Four veneer-joint forms, i.e., butt joint, lap joint, toe joint, and tape joint, and three lap-joint allocations, i.e., invariable allocation (Type I), staggered allocation (Type II), and uniform allocation (Type III), were investigated in laminates. The results revealed that the mechanical properties of veneer-joint BLVL were reduced in comparison with that of un-jointed BLVL. It was found that the best veneer-joint form was the lap joint laminate, of which the tensile strength, modulus of elasticity, and modulus of rupture values were reduced by 38.41%, 0.66%, and 10.92%, respectively, when compared to the un-jointed control samples. Type III showed the lowest influence on bending and tensile properties, followed by Type II.