Kiln drying of Acacia mangium wood: colour shrinkage warp split and check in dried lumber

Tenorio C., . and Moya R., . and Quesada-Pineda H. J., . Kiln drying of Acacia mangium wood: colour shrinkage warp split and check in dried lumber. pp. 125-139. ISSN 0128-1283

Acacia mangium is one of the most planted species in tropical countries. However dried lumber has been limited by high presence of warping splitting or checking and lack of uniformity in the final moisture content and wood colour. The aim of this research was to investigate the cause of this situation after drying. Climatic conditions where trees grew height of the tree grain pattern drying schedules distance from pith and heartwood presence were recorded. Initial and final moisture contents heartwood percentage and shrinkage percentage of board warp split and check were also measured. Results showed that colour change of dried lumber was affected by drying schedules and climatic conditions. Width shrinkage percentage of wood was affected by final moisture content climate radial wood percentage and relative distance from the pith. Shrinkage percentage of board thickness was correlated with specific gravity relative distance from the pith and drying schedule. The incidence of boards with twist bow split and check increased after drying. Crook and twist have the highest incidence rate. The quality parameters of these boards were affected by climate grain pattern initial and final moisture contents and drying schedule. The control of variables with effects on final moisture content warp and wood colour improved the quality of lumber after drying process.

Full text available from: Official URL: http://www.frim.gov.my/v1/JTFSOnline/jtfs/v24n1/12...

Abstract

Acacia mangium is one of the most planted species in tropical countries. However dried lumber has been limited by high presence of warping splitting or checking and lack of uniformity in the final moisture content and wood colour. The aim of this research was to investigate the cause of this situation after drying. Climatic conditions where trees grew height of the tree grain pattern drying schedules distance from pith and heartwood presence were recorded. Initial and final moisture contents heartwood percentage and shrinkage percentage of board warp split and check were also measured. Results showed that colour change of dried lumber was affected by drying schedules and climatic conditions. Width shrinkage percentage of wood was affected by final moisture content climate radial wood percentage and relative distance from the pith. Shrinkage percentage of board thickness was correlated with specific gravity relative distance from the pith and drying schedule. The incidence of boards with twist bow split and check increased after drying. Crook and twist have the highest incidence rate. The quality parameters of these boards were affected by climate grain pattern initial and final moisture contents and drying schedule. The control of variables with effects on final moisture content warp and wood colour improved the quality of lumber after drying process.

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Item Type:	Article
AGROVOC Term:	Acacia mangium
AGROVOC Term:	Wood
AGROVOC Term:	Lumber
AGROVOC Term:	Drying
AGROVOC Term:	Plantations
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:26
URI:	http://webagris.upm.edu.my/id/eprint/21238

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