Optimalisasi Rasio Mol SiO2/Al2O3 dalam Pembuatan Geopolimer Berbasis Abu Layang Berkadar Kalsium Tinggi

Nugroho, Danang Triawan (2019) Optimalisasi Rasio Mol SiO2/Al2O3 dalam Pembuatan Geopolimer Berbasis Abu Layang Berkadar Kalsium Tinggi. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Geopolimer berbasis abu layang tinggi kalsium telah berhasil disintesis. Sumber abu layang yang digunakan dalam penelitian ini adalah abu layang dari PT. IPMOMI, PT. Holcim dan PLTU Paiton 9. Variasi rasio mol SiO2/Al2O3 yang dilakukan dalam penelitian ini adalah 3,0; 3.3; 3.6; 3.9 dan 4.2. Uji kuat tekan dilakukan pada geopolimer yang berumur 7, 14 dan 28 hari. Hasil uji kuat tekan mengalami peningkatan dari usia 7 hingga 28 hari. Geopolimer dengan rasio 3,6 memiliki kuat tekan terbaik. Hasil uji kuat tekan untuk geopolimer IPMOMI, Holcim dan Paiton 9 secara berurutan sebesar 67,94; 50,95; dan 39,25 MPa. Geopolimer dengan kuat tekan tertinggi dikarakterisasi menggunakan XRD, FTIR, dan SEM. Hasil XRD menunjukkan geopolimer memiliki fasa amorf dan mineral gibbsite pada ketiga geopolimer yang menandakan masih ada Al(OH)3 yang belum bereaksi. Hasil analisa FTIR menunjukkan puncak-puncak karakteristik yang dimiliki geopolimer. Analisa mikrostruktur menggunakan SEM memperlihatkan ketiga geopolimer struktur yang padat. Terdapat efflorescence pada geopolimer Holcim dan Paiton 9 yang menyebabkan kuat tekan lebih rendah dari pada geopolimer IPMOMI.
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High-calcium fly ash-based geopolymers have been successfully synthesized. The source of fly ash used in this study is fly ash from PT. IPMOMI, PT. Holcim and Paiton PLTU 9. The variation in the mole ratio of SiO2 / Al2O3 carried out in this study was 3,0; 3,3; 3,6; 3,9 and 4,2. Compressive strength tests were carried out on geopolymers aged 7, 14 and 28 days. The compressive strength test results have increased from ages 7 to 28 days. Geopolymer with a ratio of 3,6 has the best compressive strength. The compressive strength test results for IPMOMI, Holcim and Paiton 9 geopolymers were 67,94; 50,95; and 39,25 MPa. The highest geopolymers with compressive strength were characterized using XRD, FTIR, and SEM. The results of the XRD showed that geopolymers had an amorphous phase and gibbsite mineral in the three geopolymers which indicated that there was still Al(OH)3 which had not reacted. The results of FTIR analysis show characteristic peaks possessed by geopolymers. Microstructure analysis using SEM shows the three solid structure geopolymers. There is efflorescence on Holcim and Paiton 9 geopolymers which causes lower compressive strength than IPMOMI geopolymers.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	geopolimer, kalsium tinggi, rasio SiO2/Al2O3
Subjects:	Q Science Q Science > QD Chemistry Q Science > QD Chemistry > Polymerization
Divisions:	Faculty of Natural Science > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Danang Triawan Nugroho
Date Deposited:	20 Jul 2026 04:51
Last Modified:	20 Jul 2026 04:51
URI:	http://repository.its.ac.id/id/eprint/68078

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