Document Type : Research Paper
Authors
1 Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Resear
2 Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran
3 Wood and Forest Products Science Research Division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO) P.O. Box 13185-116, Tehran, Iran
Abstract
In order to investigate The properties of wood eight-nineteen-years- old trees of Eucalyptus microtheca from De-hnow exprimental Plantation located 160 Km. South west of Shiraz were selected randomly and fell two from each of the four blocks. From each tree, 10 cm thick cross-sectional discs at several different heights (3 metres intervals) were cut and together with remaining boles then transfered to the Alborz Research Center-Karaj for laboratory studies. The laboratory studies included determination of physical, anatomical and mechanical properties as well as chemical compositions of wood. The mechanical properties were evaluated on the ASTM samples for air-dry and green conditions. The following conclusions were drawn from this study:
E. microtheca from one site in southern region of Iran has an average specific gravity of 0.804, fiber length of 0.811 mm, fiber diameter of 15.9 mm, lumen diameter of 5.7 mm, cell wall, thickness 5 mm, cellulose content of 44.47 percent.
It was found that the mean values of modulus of rupture, modulus of elasticity and compression strength-parallel to grain tested at green condition were 72.50 MPa, 8066.6 MPa and 38.5 MPa and air-dried condition were 120.7 MPa, 12013.8 MPa and 69.80 MPa respectively.
Data are also presented on other mechanical properties such as impact strength, nail withdrawal cleavage and et
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