Domination of Grain Bearing on the Strength Properties of Engkabang Jantong as Fast Growing Timber in Sarawak

Tapang, Jalan; Ismaili, Gaddafi; Hisham, Badorul; Bakar, Abu; Duju, Alik; Openg, Iskanda; Ismaili, Zurina; Ismaili, Safarina

doi:10.5829/idosi.ijee.2013.04.03.20

Cited by 2 publications

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“…As for green condition, the average mean at distance 25 towards 50 mm increased 15 percent ranging 0.5 to 0.6 g/cm 3 . However, at distance 50 towards 75 mm with only 7 percent increment ranging 0.5 to 0.7 g/cm 3 . Meanwhile at dry condition, the average mean at distance 25 towards 50 mm recorded with very small increment only 0.4 percent ranging 0.42 to 0.44 g/cm 3 .…”

Section: Distribution Of Basic Density At Different Distance From Thementioning

confidence: 88%

“…However, at distance 50 towards 75 mm with only 7 percent increment ranging 0.5 to 0.7 g/cm 3 . Meanwhile at dry condition, the average mean at distance 25 towards 50 mm recorded with very small increment only 0.4 percent ranging 0.42 to 0.44 g/cm 3 . At distance 50 towards 75 mm density increased up to 10 percent ranging 0.4 to 0.48 g/cm 3 .The proportional relationship between basic density and the distance from the pith is very significant, where density increase away from the vortex or pith.…”

Section: Distribution Of Basic Density At Different Distance From Thementioning

confidence: 88%

“…Sarawak is known as the richest region with flora and fauna consisting of numerous indigenous species of fast-growing timber [2]. The effort has been taken by introducing fast growth indigenous timber species for plantation and research had been conducted to perceive suitable and potential indigenous timber species for light hardwood industries utilisation and for engineering structural design purposes [3,4].…”

Section: Introduction mentioning

confidence: 99%

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Behaviour of Strength Properties of Fast-Growing Endospermum diadenum Species at Different Distance from the Vortex

Ismaili¹,

Roslani²,

Rahim³

et al. 2017

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The data performance for structural usage of highly engineered wood is very useful, however, the lacking of the data is very much concern for fast-growing indigenous timber species in timber engineering field. In correlation with that, the strength properties behaviour of Endospermum diadenum has to be studied to analyse the distribution pattern of strength properties at a different distance from the vortex also known as pith. The species have been obtained from the East Campus of Universiti Malaysia Sarawak's forest reserve. Strength properties test were carried out namely, static bending (modulus of rupture-MOR and modulus of elasticity-MOE), and the compressive strength (compression stress parallel to grain). Meanwhile, physical properties test was carried out namely, moisture content (MC) and density. Small specimens measuring 20 x 20 mm were tested in green and dry conditions in accordance with British Standard, BS 373:1957 (British Standards Institution, 1957). The green condition refers to moisture content greater than 19 percent and dry condition with moisture content less than or equal 19 percent. All the results that had been tested were analyzed using statistical analysis as mean results. The strength properties of specimen increased from the pith towards the sapwood in which the strength is the lowest at 25 mm from pith followed by 50 mm, and the highest is at 75 mm from the pith. Distribution of the basic density also increases slightly from the pith towards the sapwood with a significant increment in average mean value at 25 mm from vortex with 0.54 g/cm 3 , 0.62 g/cm 3 at 50 mm and 0.66 g/cm 3 at 75 mm from the vortex. Meanwhile, for dry condition, the increases in average mean value with 0.425 g/cm 3 at 25 mm, 0.427 g/cm 3 at 50 mm and 0.47 g/cm 3 at 75 mm from the vortex. It can be concluded that the physical properties of the wood have a direct impact on the wood stiffness and strength.

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Section: Distribution Of Basic Density At Different Distance From Thementioning

confidence: 88%

Section: Distribution Of Basic Density At Different Distance From Thementioning

confidence: 88%

Section: Introduction mentioning

confidence: 99%

See 1 more Smart Citation

Behaviour of Strength Properties of Fast-Growing Endospermum diadenum Species at Different Distance from the Vortex

Ismaili¹,

Roslani²,

Rahim³

et al. 2017

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“…There were no detectable diseases while the Acacia mangium plantations were young. However, as the plantations grew, they were found to be prone to a number of diseases [10,11]. Ting and Teng [2] also mentioned that the Acacia mangium has a higher tendency to have defects.…”

Section: Introductionmentioning

confidence: 99%

The Mechanical Strength Properties, Treatability Retention and Hazard Classification of Treated Small-Clear Fast-Growing Acacia mangium Superbulk at Different Age Groups

Yahya

Ismaili

Meekiong

et al. 2023

Forests

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The slow growth rate of primer species has affected the supply available to accommodate the market demand. To overcome these problems, a study was carried out to fully utilise fast-growing timber as the primary resource to ensure the demand for timber logs continues. This paper aimed to determine mechanical strength properties, treatability retention, and hazard classification of 7-, 10- and 13-year-old small-clear samples of Acacia mangium superbulk collected from Daiken Plantation Sdn. Bhd. Bintulu, Sarawak, following treatment with 10% copper chrome arsenic. As a result of this study, the maximum strength was obtained from the 10-year-old age group, with the modulus of rupture (MOR), the modulus of elasticity (MOE), and compression parallel to the grain values of small-clear treated Acacia mangium superbulk reaching 118.76 N/mm2, 15,020 N/mm2, and 57.82 N/mm2, respectively. In addition, the treatability retentions obtained were 149.27 L/m3, 147.25 L/m3, and 141.09 L/m3, which were recorded from the 7-, 10-, and 13-year-old samples, respectively. Meanwhile, the dry-salt retentions obtained from the 7-, 10- and 13-year-old samples were 14.93 kg/m3, 14.73 kg/m3, and 14.11 kg/m3, respectively. Hence, this species is classified as moderately difficult to treat under CCA (treatability retention: 80–160 L/m3) and is categorised under the hazard class of H4 (dry salt retention: 12–16 kg/m3).

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Domination of Grain Bearing on the Strength Properties of Engkabang Jantong as Fast Growing Timber in Sarawak

Cited by 2 publications

References 0 publications

Behaviour of Strength Properties of Fast-Growing Endospermum diadenum Species at Different Distance from the Vortex

Behaviour of Strength Properties of Fast-Growing Endospermum diadenum Species at Different Distance from the Vortex

The Mechanical Strength Properties, Treatability Retention and Hazard Classification of Treated Small-Clear Fast-Growing Acacia mangium Superbulk at Different Age Groups

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