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Bending properties and joint efficiency of some tropical hardwoods finger-jointed in green and dry states

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dc.contributor.author Amoah M.
dc.contributor.author Kwarteng F.O.
dc.contributor.author Dadzie P.K.
dc.date.accessioned 2022-10-31T15:05:51Z
dc.date.available 2022-10-31T15:05:51Z
dc.date.issued 2014
dc.identifier.issn 0972172X
dc.identifier.other 10.1007/s13196-014-0118-y
dc.identifier.uri http://41.74.91.244:8080/handle/123456789/568
dc.description Amoah, M., University of Education, Winneba, Kumasi Ashanti Region, Ghana; Kwarteng, F.O., University of Education, Winneba, Kumasi Ashanti Region, Ghana; Dadzie, P.K., Interior Architecture and Furniture Production Department, Kumasi Polytechnic, Kumasi, Ghana en_US
dc.description.abstract This study investigated the bending properties and joint efficiencies of some tropical hardwoods finger jointed in green and dry states. Two groups of finger-jointed pieces were produced from mill off-cuts of four different tropical timber species using PVA (protovil D3). One group was produced from pieces initially kiln dried to approximately 12 % MC while the other group was produced from green pieces (approx. 25 % MC). Solid wood test samples, treated to similar MCs as the finger jointed samples, served as a reference group. The results showed that the joint efficiencies in MOE of test group finger jointed in dry state ranged between 58 and 89 % for medium and low density species, respectively. A much lower joint efficiencies in MOE were recorded for test groups finger-jointed in green state: 49.4 and 54.7 % for medium and low density species, respectively. For MOR, the minimum and maximum joint efficiencies for test group finger jointed in dry state were 14.5 and 50.7 %, respectively compared to 12.9 and 40.1 %, respectively for test group finger jointed in green state. The results show that the joint efficiency in stiffness appears to be much higher than that in strength. Low density tropical timber species appear to exhibit higher joint efficiency than medium density ones. The synergy between density and moisture condition of wood prior to finger jointing affects the joint efficiency in MOE while only the density of species affects the joint efficiency in MOR. Finger jointing lumber with PVA may be used for non-structural applications. Further research is required to obtain enough data to confirm the possibility of using low density tropical timber species finger jointed in dry state with PVA for structural applications. � 2014 Indian Academy of Wood Science. en_US
dc.publisher Springer India en_US
dc.subject Bending properties en_US
dc.subject Density en_US
dc.subject Joint efficiency en_US
dc.subject PVA (protovil D3 extra) en_US
dc.subject Structural applications en_US
dc.title Bending properties and joint efficiency of some tropical hardwoods finger-jointed in green and dry states en_US
dc.type Article en_US


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