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Articles by Hashim W. Samsi
Total Records ( 3 ) for Hashim W. Samsi
  Razak Wahab , Hashim W. Samsi , Othman Sulaiman , Rafidah Salim and Rokiah Hashim
  The suitability of using an eco-friendly oil curing process was investigated on cultivated Bambusa vulgaris bamboo in order to prolong their service life span. B. vulgaris was chosen as it is a type of bamboo species that is easy to cultivate and has good physical as well as mechanical properties. Matured bamboo culms of 4 year-old from internodes 5, 6 and 7 in green and air-dried conditions were heat treated. The heat treatment process used palm oil as the heating medium at temperatures of 140, 180 and 220°C for durations of 30, 60 and 90 min. The air-dried culms exhibited overall higher physical, strength and durability properties than the green and untreated culms. The Modulus of Elasticity (MOE) values of heat treated bamboo in bending was reduced by 13 to 42% in green and by 3 to 29% in air-dried conditions. The compression strength were reduced by 18 to 33% in green and by 14 to 27% in air-dried ones. The heat treated bamboo lost from 5 to 34% of their initial weight after undergoing 12 months of ground-contact tests for both green and air-dried conditions.
  Razak Wahab , Othman Sulaiman , Khairunnisaa Abd. Rasid and Hashim W. Samsi
  Four age-groups of rattans comprising 8, 12, 18 and 24 year-old culms at portions 1, 2, 3, 4, 5 and 6 from the base were used in this study. The rattans were harvested from two rubber plantation estates in Terengganu and Pahang that possess similar soil characteristics and properties. Generally, the results of the study indicate that rattans with higher basic density possess higher compression and bending strength compares to those with lower values. The lower part of the rattans shows to have higher basic density compare to higher part. The 18 and 24 year old rattans shows to have higher basic density compare to the 8 and 12 year-old. The 18 and 24 year old rattans indicate to have 7 to 8 times higher strength compares to younger rattans. It can be concluded that the cultivated rattans of age 18 and above possessed the mechanical characteristics that makes them suitable for utilization.
  Razak Wahab , Hashim W. Samsi , Mohd Tamizi Mustafa , Mazlan Mohamed , Mohd Sukhairi Mat Rasat and Madihan Yusof
  The physical, mechanical and morphological properties of bio-composite from a mixture of Oil Palm Fronds (OPF) and Kenaf Bast Fibers (KBF) are investigated. Urea formaldehyde resin used in cementing the mixtures together. The OPF and KBF were mixed at five different ratios. Testing for the physical and mechanical properties made by the European EN standards. Testing on the physical properties includes the density, water absorption, thickness swelling and wettability. Mechanical testing includes static bending for modulus of elasticity and modulus of rupture, besides internal bonding of the boards, revealed the enhanced values after increasing the resin content. The morphological studies were conducted using micrograph’s structures obtained by scanning electron microscope used in determining the distribution of the resin in the boards. The overall results showed that boards with 100% OPF and 50:50% (OPF:KBF) at 14% of resin content exhibited the highest properties compared to the other boards.
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