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Articles by Zakiah Ahmad
Total Records ( 2 ) for Zakiah Ahmad
  Nur Ilya Farhana Md Noh , Zakiah Ahmad and Mohd Hisbany Mohd Hashim
  In order to improve a timber natural quality and equip the timber with new upgraded properties, the timber must be treated. One of the methods of treatment which is environmental friendly is heat treatment. The high level of temperature used in this treatment will modify the properties of timber by using high temperature instead of using chemical preservatives as common practice. This study presents the effect of heat treatment on physical properties which is moisture content for two types of Malaysia hardwood timber namely keruing and light red meranti. Ceramic fiber had been used as material to design an electronic furnace was used as an oven for the heat treatment process. The result shows a reduction in moisture content for both species after heat treatment and the difference is significant. Lower in moisture content indicates a positive indicator which theoretically leading to the increment of movement stability and maximise the strength because mechanical properties is increasing when moisture content is low.
  Lannie Francis and Zakiah Ahmad
  This study reports the bonding performance of CCA treated glued laminated timber (glulam) made from two Malaysian tropical timber species namely bintangor (Calophyllum sp.) from Strength Grouping (SG) 5 and Sesenduk (Endospermum sp.) from SG 7. All the glulam beams were exposed to three different service conditions namely room condition, covered condition and uncovered condition for six month period prior to the test. The bonding properties of the beams were obtained by block shear test and delamination test accordance to malaysian standard MS758. Results showed that the delamination for untreated glulam were higher than the delamination of treated glulam. The wood failure percentage for all glulam in all exposure conditions were higher than the acceptance criteria for good glue line performance as stated in MS758. This indicates that the glulam untreated and treated with CCA have good bonding performance.
 
 
 
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