relation: https://eprints.untirta.ac.id/53063/
title: PENGARUH WAKTU PENGADUKAN DAN UKURAN FOAMING AGENT CaCO3 MENGGUNAKAN LIMBAH KULIT TELUR TERHADAP KEMAMPUAN ABSORBSI SUARA PADA ALUMINIUM FOAM
creator: MAULANA, EDWIN
subject: TJ Mechanical engineering and machinery
subject: TS Manufactures
description: This study aims to determine the effect of variations in stirring time (30, 45, 60 seconds) and foaming agent size CaCO₃ (100#, 120#, 140#) from eggshell waste on the structure and sound dampening ability of aluminum foam. Foam was made by the melt route method at a temperature of 760°C using aluminum ADC12, CaCO₃ 3 wt% (calcined at 105°C), and Al₂O₃ 1.5 wt% as a viscosity stabilizer. The results showed that increasing stirring time reduced the pore size and increased the density, but decreased the porosity. At the size of 100#, the pores decreased from 0.777 mm (30 seconds) to 0.203 mm (60 seconds), the density increased from 0.12 to 0.18 g/cm³, and the porosity decreased from 95.6% to 93.4%. The 140# size shows a more stable structure. Acoustic tests using the Impedance Tube Testing method show that the 100#–60 second specimen has the best performance, with an average Transmission Loss value of 48.19 dB and a peak of 58 dB at a frequency of 125 Hz. In contrast, the 120# 60 second size shows a decrease in TL due to agglomeration. Overall, CaCO₃ from eggshells is effective as a foaming agent in producing aluminum foam with good sound damping capabilities.
date: 2025-07-29
type: Thesis
type: NonPeerReviewed
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language: en
identifier: https://eprints.untirta.ac.id/53063/2/EDWIN%20MAULANA_3334190016_01.pdf
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identifier: https://eprints.untirta.ac.id/53063/3/Edwin%20Maulana_3334190016_02.pdf
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identifier: https://eprints.untirta.ac.id/53063/4/Edwin%20Maulana_3334190016_03.pdf
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identifier: https://eprints.untirta.ac.id/53063/5/Edwin%20Maulana_3334190016_04.pdf
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identifier: https://eprints.untirta.ac.id/53063/6/Edwin%20Maulana_3334190016_05.pdf
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identifier: https://eprints.untirta.ac.id/53063/7/Edwin%20Maulana_3334190016_Ref.pdf
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identifier: https://eprints.untirta.ac.id/53063/8/Edwin%20Maulana_3334190016_Lamp.pdf
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identifier: https://eprints.untirta.ac.id/53063/9/Edwin%20Maulana_3334190016_CP.pdf
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language: id
identifier: https://eprints.untirta.ac.id/53063/19/Edwin%20Maulana_3334190016_FullText.pdf
identifier:   MAULANA, EDWIN  (2025) PENGARUH WAKTU PENGADUKAN DAN UKURAN FOAMING AGENT CaCO3 MENGGUNAKAN LIMBAH KULIT TELUR TERHADAP KEMAMPUAN ABSORBSI SUARA PADA ALUMINIUM FOAM.  S1 thesis, FAKULTAS TEKNIK UNIVERSITAS SULTAN AGENG TIRTAYASA.