Physical and mechanical properties of Acacia Mangium x Acacia Auriculiformis hybrid (acacia hybrid) and Acacia Mangium Superbulk planted in Sarawak
Recently two new wood materials were introduced in Sarawak, namely Acacia mangium x Acacia auricu/iformis (Acacia hybrid) and Acacia mangium superbulk (A. mangium superbulk) which have desirable characteristics of rapid growth rates and greater resistance to heart rot. Studies of their basic charac...
| Main Authors: | , |
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| Format: | Proceeding |
| Language: | English |
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Conference of Forestry and Forest Products Research (CFFPR)
2007
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| Online Access: | http://ir.unimas.my/id/eprint/998/ http://ir.unimas.my/id/eprint/998/1/J.%20Ismail.pdf |
| _version_ | 1848834686354194432 |
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| author | Ismail, Jusoh Farawahida, A. Z |
| author_facet | Ismail, Jusoh Farawahida, A. Z |
| author_sort | Ismail, Jusoh |
| building | UNIMAS Institutional Repository |
| collection | Online Access |
| description | Recently two new wood materials were introduced in Sarawak, namely Acacia mangium x Acacia auricu/iformis (Acacia hybrid) and Acacia mangium superbulk (A. mangium superbulk) which have desirable characteristics of rapid growth rates
and greater resistance to heart rot. Studies of their basic characteristics are important for future utilization. The objectives of this study were to determine the physical
and mechanical properties and to compare the properties among A. mangium, A. auriculiformis, A. hybrid and A. mangium superbulk. Acacia trees of six years age were studied and sampled by cutting at dbh, 50%,70% and 90% heights of the clear bole. The basic densities of A. auricuJiformis, A. mangium, A. hybrid and A. mangium
superbulk were 636, 464,472 and 334 kg m-3 respectively, and statistically the basic densities of A. hybrid and A. mangium were similar. Volumetric shrinkages for all acacias ranged between 14.39 and 15.99% and the differences were not statistically different Static bending test showed that the modulus of rupture (MOR) of A. 2 auriculiformis was 89 N mm- , A. hybrid 85 N mm-z, A. mangium 78 N mm-2 and
A. superbulk 55 N mm-z. For compression parallel to grain, the maximum crushing strength (MCS) of A. hybrid was the highest (62 N mm2), fallowed by A. auriculiformis (59 N mm2), A. mangium (53 N mm-2) and A. mangium superbulk (50 N mm-2). Further analyses revealed that the MOR, MOE and MCS among A. mangium, A. auricu/iformis and A. hybrid were not statistically different. However, the strength properties of A. mangium superbulk were significantly lower compared with A. mangium, A. auriculiformis and A. hybrid. It can be concluded that improvements of Acacia hybrid and A. mangium superbulk are only confined to growth characteristics
and heart-rot resistance but not wood properties. |
| first_indexed | 2025-11-15T05:55:55Z |
| format | Proceeding |
| id | unimas-998 |
| institution | Universiti Malaysia Sarawak |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T05:55:55Z |
| publishDate | 2007 |
| publisher | Conference of Forestry and Forest Products Research (CFFPR) |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | unimas-9982022-01-05T03:39:05Z http://ir.unimas.my/id/eprint/998/ Physical and mechanical properties of Acacia Mangium x Acacia Auriculiformis hybrid (acacia hybrid) and Acacia Mangium Superbulk planted in Sarawak Ismail, Jusoh Farawahida, A. Z AC Collections. Series. Collected works Recently two new wood materials were introduced in Sarawak, namely Acacia mangium x Acacia auricu/iformis (Acacia hybrid) and Acacia mangium superbulk (A. mangium superbulk) which have desirable characteristics of rapid growth rates and greater resistance to heart rot. Studies of their basic characteristics are important for future utilization. The objectives of this study were to determine the physical and mechanical properties and to compare the properties among A. mangium, A. auriculiformis, A. hybrid and A. mangium superbulk. Acacia trees of six years age were studied and sampled by cutting at dbh, 50%,70% and 90% heights of the clear bole. The basic densities of A. auricuJiformis, A. mangium, A. hybrid and A. mangium superbulk were 636, 464,472 and 334 kg m-3 respectively, and statistically the basic densities of A. hybrid and A. mangium were similar. Volumetric shrinkages for all acacias ranged between 14.39 and 15.99% and the differences were not statistically different Static bending test showed that the modulus of rupture (MOR) of A. 2 auriculiformis was 89 N mm- , A. hybrid 85 N mm-z, A. mangium 78 N mm-2 and A. superbulk 55 N mm-z. For compression parallel to grain, the maximum crushing strength (MCS) of A. hybrid was the highest (62 N mm2), fallowed by A. auriculiformis (59 N mm2), A. mangium (53 N mm-2) and A. mangium superbulk (50 N mm-2). Further analyses revealed that the MOR, MOE and MCS among A. mangium, A. auricu/iformis and A. hybrid were not statistically different. However, the strength properties of A. mangium superbulk were significantly lower compared with A. mangium, A. auriculiformis and A. hybrid. It can be concluded that improvements of Acacia hybrid and A. mangium superbulk are only confined to growth characteristics and heart-rot resistance but not wood properties. Conference of Forestry and Forest Products Research (CFFPR) 2007 Proceeding NonPeerReviewed text en http://ir.unimas.my/id/eprint/998/1/J.%20Ismail.pdf Ismail, Jusoh and Farawahida, A. Z (2007) Physical and mechanical properties of Acacia Mangium x Acacia Auriculiformis hybrid (acacia hybrid) and Acacia Mangium Superbulk planted in Sarawak. In: Conference on Forestry & Forest Products Research 2007 : 270-278. http://www.isnac2015.org/ |
| spellingShingle | AC Collections. Series. Collected works Ismail, Jusoh Farawahida, A. Z Physical and mechanical properties of Acacia Mangium x Acacia Auriculiformis hybrid (acacia hybrid) and Acacia Mangium Superbulk planted in Sarawak |
| title | Physical and mechanical properties of Acacia Mangium x Acacia Auriculiformis hybrid (acacia hybrid) and Acacia Mangium Superbulk planted in Sarawak |
| title_full | Physical and mechanical properties of Acacia Mangium x Acacia Auriculiformis hybrid (acacia hybrid) and Acacia Mangium Superbulk planted in Sarawak |
| title_fullStr | Physical and mechanical properties of Acacia Mangium x Acacia Auriculiformis hybrid (acacia hybrid) and Acacia Mangium Superbulk planted in Sarawak |
| title_full_unstemmed | Physical and mechanical properties of Acacia Mangium x Acacia Auriculiformis hybrid (acacia hybrid) and Acacia Mangium Superbulk planted in Sarawak |
| title_short | Physical and mechanical properties of Acacia Mangium x Acacia Auriculiformis hybrid (acacia hybrid) and Acacia Mangium Superbulk planted in Sarawak |
| title_sort | physical and mechanical properties of acacia mangium x acacia auriculiformis hybrid (acacia hybrid) and acacia mangium superbulk planted in sarawak |
| topic | AC Collections. Series. Collected works |
| url | http://ir.unimas.my/id/eprint/998/ http://ir.unimas.my/id/eprint/998/ http://ir.unimas.my/id/eprint/998/1/J.%20Ismail.pdf |