Physical and Mechanical Properties of Eucalyptus Wood Clone K7
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Abstract
Eucalyptus is one of the most popular commercial woods in Thailand. It is an important raw material for various wood industries. Utilization in the form of sawn timber is limited, due to lack of basic information, given that Eucalyptus clone K7 is widely planted since it grows fast. The research objective of this study was to determine the physical and mechanical properties of Eucalyptus clone K7 as basic data for utilization in the form of sawn timber. The physical properties of K7, i.e., average specific gravity under oven dry condition was 0.52, fiber saturation point averaged between 26 to 28 %, maximum shrinkage in tangential, radial, and longitudinal direction was 11.00, 7.00 and 0.65 %, respectively per moisture content decrease from fiber saturation point to 0 % and desorption isotherm. The mechanical properties, i.e., modulus of rupture was 72.45 MPa, modulus of elasticity was 6,654 MPa, compression parallel to grain was 41.94 MPa, compression perpendicular to grain was 5.33 MPa, hardness was 3,075 N, cleavage and nail holdings were 2.00 and 17.91 N/mm, respectively. Mechanical properties were compared with wood standard used for the structure and it was found that the clone K7 is not suitable for use in the main structure of a building. It can be used for furniture, buttress, flooring, pallet, wood chips for pulp industry, wood composites industry, firewood, and charcoal.
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ข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ขอรับรองว่า ต้นฉบับที่เสนอมานี้ยังไม่เคยได้รับการตีพิมพ์และไม่ได้อยู่ในระหว่างกระบวนการพิจารณาตีพิมพ์ลงในวารสารหรือสิ่งตีพิมพ์อื่นใด ข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ยอมรับหลักเกณฑ์และเงื่อนไขการพิจารณาต้นฉบับ ทั้งยินยอมให้กองบรรณาธิการมีสิทธิ์พิจารณาและตรวจแก้ต้นฉบับได้ตามที่เห็นสมควร พร้อมนี้ขอมอบลิขสิทธิ์ผลงานที่ได้รับการตีพิมพ์ให้แก่วารสารวนศาสตร์ คณะวนศาสตร์ มหาวิทยาลัยเกษตรศาสตร์ กรณีมีการฟ้องร้องเรื่องการละเมิดลิขสิทธิ์เกี่ยวกับภาพ กราฟ ข้อความส่วนใดส่วนหนึ่ง หรือ ข้อคิดเห็นที่ปรากฏในผลงาน ให้เป็นความรับผิดชอบของข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) แต่เพียงฝ่ายเดียว และหากข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ประสงค์ถอนบทความในระหว่างกระบวนการพิจารณาของทางวารสาร ข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ยินดีรับผิดชอบค่าใช้จ่ายทั้งหมดที่เกิดขึ้นในกระบวนการพิจารณาบทความนั้น”
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