Basic Engineering Properties of Laminated Veneer Lumber Produced from Tropical Hardwood Species
One of the reasons for a limited structural usage of L VL in tropical countries is the lack of research and development to establish design criteria for this material. Such information is essential for the development of design values as well as new structural uses of LVL.. This study aimed to es...
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| 格式: | Thesis |
| 語言: | English English |
| 出版: |
2003
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| 主題: | |
| 在線閱讀: | http://psasir.upm.edu.my/id/eprint/10152/1/FH_2003_15.pdf |
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| 總結: | One of the reasons for a limited structural usage of L VL in tropical countries
is the lack of research and development to establish design criteria for this material.
Such information is essential for the development of design values as well as new
structural uses of LVL.. This study aimed to establish basic engineering properties of
L VL produced from selected tropical hardwood species i.e. Yellow Meranti
(Shorea spp.), Kedondong (Conarium spp), Bintangor (Calophylhlm spp ), White
Meranti horea spp.), and Kerning (Dipterocarpus spp). Tests for static bending,
bending shear, tensile and compression parallel to longitudinal axis were carried out
using in-grade size specimens. The tests were conducted in accordance withASINZS 4357 (Structural Laminated Veneer Lumber). The effects of two important
factors (I) wood species and (2) veneer thickness, on the strength properties of LVL
were studied. The results show that Kerning LVL has the highest density (700 - 820
kglm3), followed by White Meranti (600-680 kg/m Bintangor (570-590 kg/m,
Kedondong (545-574 kg/m3) and Yellow Meranti (510-541 kg/m3). Using thinner
veneers increased the LVL panel density between 2.8% (in Kedondong) to 8.9% (in
Kerning). Despite having lower board density. both White Meranti and Bintangor LVLs had significantly superior engineering properties than those made from
Keruing, Kedondong and Yellow Meranti. Keruing LVL performed below the
expectation in all the strength properties which was attributed to the poor bond
quality observed through the gluebond shear test and scanning electron microscope
analysis. |
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