|
|
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. |
|
|
|
|
|
|