Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Physical and Mechanical Properties of (a. Mangium × A. Auriculiformis) Hybrid Acacia.

Dr. Md. Addul Khaleque
Divisional Officer (Ex)
Seasoning & Timber Physics Division,Bangladesh Forest Research Institute,Chittagong.

U. K. Rokeya
Field Investigator
Seasoning & Timber Physics Division,Bangladesh Forest Research Institute, Chittagong.

M. Akter Hossain
Field Investigator
Seasoning & Timber Physics Division,Bangladesh Forest Research Institute, Chittagong.

Abstract/ Executive Summary:

The physical and mechanical properties of hybrid acacia, produced from natural crossing between two introduced timber species (Acacia auriculiformis and Acacia mangium) were studied. The timber hybrid acacia is of medium dense having specific gravity 0.56 at green condition which is less than that of teak (Tectona grandis). The volumetric shrinkage of hybrid acacia wood was found greater than that of teak but the specific gravity was found less than that of teak. From the study of physical and mechanical properties it is evident that the species is moderately strong. The species is suitable for making furniture and other household articles.

Keywords: Hybrid Acacia, Specific gravity, Physical properties, Mechanical properties

Location: Silviculture Research Station, Keochia, Chittagong

Start Date: 01-07-2001

End Date: 30-06-2004

Program Area: Resource Development and Management

Commodity: Akash moni, Akash moni

Objectives:

To assess the suitability of (A. mangium × A. auriculiformis) Hybrid acacia wood for making furniture and construction materials.

Methodology:

Three representative trees of hybrid Acacia species was collected from the Silviculture Research Station, Keochia, Chittagong. The age of the tree was 9 - 12 years and the height and girth were 8 - 12.5 m and 50 - 85 cm, respectively. Three samples per bole were selected randomly from each of three 2.50 m bolts above the stump height of each tree. All the bolts were fairly straight and free from natural defects. For determination of physical properties, namely moisture content, specific gravity and shrinkage, each tree was divided into its butt, middle and top position. The sizes of the samples are 2.54 cm ×2.54 cm ×5.08 cm and 5.08 cm ×5.08 cm ×15.24 cm, respectively.For determination of mechanical properties the bolts were sawn to 6.35 cm ×6.35 cm ×2.50 m sticks. The sticks were prepared in pairs. One stick was taken from each test in green condition and the other for air-dry condition. The sticks for air-dry tests were allowed to attain the equilibrium moisture content of 12 - 14%. Measurement of properties: Small clear specimens were tested, in both green and air-dry states, for the following physical and mechanical properties using the procedure given in ASTM.

Mechanical properties: All the test sticks were dressed to 5.08 cm x 5.08 cm x 2.50 m strips and clear specimens to the sizes specified by the American Society for Testing of Materials (ASTM) standards D 143-52 (1). The specimens of various parameters were tested in accordance with the specifications of ASTM except toughness. The tests for mechanical properties were carried out in a Riehle screw power type universal testing machine. Toughness tests were performed in a toughness testing machine designed by the US Forest Products Laboratory, Madison, Wisconsin.

Source of Information: Journal of Bangladesh Academy of Sciences 34 (2): 181-187, 2010

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Hybrid acacia is a fast growing and productive tree with more resistance to heart rot disease. The heart wood is dark brown and sap wood is light colored. It is a moderately heavy and moderately strong wood species. The species is fine grained and may be used for making furniture, small hand tools, cabinet door frame, window frame, for pulp and other purposes.

Knowledge Management: Journal