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Articles by Salmia Beddu
Total Records ( 4 ) for Salmia Beddu
  Siti Hidayah Abu Talib , Syarifah Intan Najla Syed Hashim , Salmia Beddu and Muhammad Salleh Abustan
  Asphalt pavements subject to solar radiation can reach high temperature causing not only environmental problems such as heat island effect on cities but also structural damage due to rutting or hardening of road. The main aim of this research is to determine the maximum heat area in pavement where the scope of study consists of field experiment under real atmospheric condition and laboratory testing. The rise in temperature of water solvent flowing through the conduction of steel pipe was used as indicator of the efficiency of heat capture. The data from field experiment had been collected using data logger and the reading of temperature was recorded every 5 min for 24 h starting from 12-12 am the next day for 3 days to get the average temperature reading of water solvent in steel pipes. Steel pipe with water solvent at depth of 50 mm has the maximum temperature of heat area in pavement with highest thermal storage and can withst and the highest vehicle loading applied on it.
  Daud Mohamad , Salmia Beddu , Siti Nabihah Sadon , Nur Liyana Mohd Kamal , Zarina Itam and Yaser Ameen Ali Alshugaa
  Curing is maintaining a sufficient water and temperature in concrete through its early periods to get the aimed properties of concrete. Curing is critical in production of concrete to ensure that concrete will have the durability and strength. In order to make the concrete cured by itself, a chemical called Polyethylene Glycol 400 (PEG) is used where it helps in water retention throughout the concrete during curing process. In this project, PEG and Fly Ash (FA) were added as a self-curing agents in mortar to determine the effects of self-curing agents in term of compressive strength. The mortar ratio was 1:2.75 (cement:sand). PEG was added first with different percentage 1, 2 and 3% by weight of cement. Then, FA was added with different percentage 20, 40, 60, 80 and 100% by weight of cement. The w/c ratio was 0.45 to ensure the workability. All mortars were exposed to the fresh air (in the laboratory environment with 25°C for curing to see the effect of self-curing agents. The result showed that, self-curing agents have improved the strength of mortar. The mortar using PEG has scientifically increased the strength by 31% compared to conventional mortar. And 1% was the optimum percentage. FA enhanced the early age strength by 80% compared to normal mortar. Also, 20% of FA was the optimum percentage.
  Mushtaq Ahmad , Zarina Binti Itam , Salmia Beddu , Firas Basim Ismail Alanimi and Shamini A/P Soanathan
  This project aimed to determine solar heat temperature variations in copper and rubber pipes embedded into the asphalt pavement using finite element method. The significant of the project to explore sustainable energy generation while using pavement surface as a heat collector therefore solar efficiency beneath paved surface has to determine. The arrangement of copper and rubber pipe in asphalt pavement is serpentine. The asphalt pavement size of 300×300 and 300×500 mm is simulated in ANSYS. Asphalt pavement is embedded with serpentine copper and rubber pipes of diameter of 40 mm. The solar heat temperature is collected in asphalt at depths of 50, 100 and 150 mm. Pipes are filled with liquid (water) to maintain or cool the temperature at night time. The stated asphalt pavement size samples have created where copper and rubber pipes are embedded and temperature collection among each sample is recorded. The findings of the project indicated that larger surface area of asphalt pavement (30×500 mm) exposed to the Sunlight collect more energy than smaller (300×300 mm) size of asphalt pavement. The serpentine arrangement of copper and rubber pipes embedded in asphalt pavement has slight difference of solar heat collections. The solar heat collected at 50 mm depth is higher than 100 and 150 mm depths.
  Salmia Beddu , Zarina Binti Itam , Mushtaq Ahmad , Firas Basim Ismail Alanimi and Mahyun Zainoodin
  Malaysia has potential to generate alternative renewable solar energy. Rubber tube was embedded in asphalt pavement at a depth of 75 mm. Thermal behavior of solar heat was studied at different location in asphalt pavement. Asphalt pavement top surface which is exposed to the direct sunlight, temperature above the rubber tube, temperature of liquid (water) filled in rubber tube and temperature below the rubber tube were the locations chosen to observe the thermal behavior and heat transformation from top to bottom. The observation was carried out for 3 days in asphalt pavement and using thermodynamic first law to find the heat efficiency. Study concludes that the maximum surface temperature reach to 59.5°C and water inside rubber tube temperature reach to 54.7°C. In the result minimum 2.4% and maximum heat efficiency 22.7% produced by using rubber tube the case might be change using other metals.
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