Sound absorption characteristic of lightweight brick containing Expanded Polystyrene Beads (EPS) and Palm Oil Fuel Ash (POFA)
The main objectives of this research is to identify the sound absorption characteristic of lightweight bricks containing expanded polystyrene beads (EPS) and palm oil fuel ash (POFA). In order to fulfill the standard of a lightweight brick to be used as a building element, the physical and mec...
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| Format: | Thesis |
| Language: | English English English |
| Published: |
2020
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/1125/1/24p%20NURUL%20AMIRAH%20KAMARULZAMAN.pdf http://eprints.uthm.edu.my/1125/2/NURUL%20AMIRAH%20KAMARULZAMAN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/1125/3/NURUL%20AMIRAH%20KAMARULZAMAN%20WATERMARK.pdf |
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| Summary: | The main objectives of this research is to identify the sound absorption characteristic
of lightweight bricks containing expanded polystyrene beads (EPS) and palm oil fuel
ash (POFA). In order to fulfill the standard of a lightweight brick to be used as a
building element, the physical and mechanical properties were test first. EPS was
used as a sand replacement whereas POFA was used as a cement replacement. The
bricks were casted with 0% to 50% of EPS and 0% to 25% of POFA and air cured
for 7, 28 and 56 days. The bricks incorporated with 30%, 40% and 50% of EPS were
considered lightweight bricks as they have a density below 1680 kg/m3
. The lowest
density recorded for the brick sample with the maximum EPS and POFA content was
1320.52 kg/m3
after a curing period of 56 days. Bricks incorporated with varying
percentages of EPS and POFA have strength values between 3.7 MPa to 21.3 MPa
which are acceptable for load bearing and non-load bearing structures. The water
absorption values recorded for these bricks were between 4.37% to 13.4%. The brick
sample with 0% POFA and 50% EPS recorded the lowest water absorption values
while the brick sample with 25% POFA and 0% EPS recorded the highest water
absorption values. For the sound absorption test, at high frequency, the brick
specimen with 25% POFA and 50% EPS recorded the lowest coefficient of 0.009
while the best sound absorption coefficient recorded was 0.467 for the brick sample
with 0% EPS and 10% POFA. At low frequency, the bricks recorded a sound
absorption coefficient of 0.89 to 0.998. Most The brick have excellent absorption at
low frequency and good absorption at high frequency. Lastly, the density properties
and sound absorption coefficient were found to be the most correlated due to the
highest R
2
value of 0.9259 compared to other properties. |
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