Analisis Pengaruh Penambahan Silica Fume terhadap Kuat Tekan Mortar Geopolimer Berbasis Fly Ash dan Ground Granulated Blast Furnace Slag

Firzana, Najla Hanisa (2023) Analisis Pengaruh Penambahan Silica Fume terhadap Kuat Tekan Mortar Geopolimer Berbasis Fly Ash dan Ground Granulated Blast Furnace Slag. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Silica fume merupakan limbah padat yang mengandung silikon dioksida amorf dalam jumlah tinggi dan memiliki ukuran partikel yang sangat halus. Maka dari itu, silica fume dapat dimanfaatkan sebagai material dalam pembuatan mortar geopolimer yang memanfaatkan reaksi geopolimerisasi. Pada penelitian ini, telah dilakukan pembuatan mortar geopolimer berbasis fly ash dan ground granulated blast furnace slag (GGBFS) dengan menggunakan larutan alkali NaOH 16 M dan Na2SiO3 serta variasi penambahan silica fume 5, 10, 15, 20, dan 25%. Tujuan penelitian ini adalah untuk menganalisis pengaruh penambahan silica fume terhadap kekuatan tekan mortar geopolimer. Material yang digunakan pada penelitian ini diuji karakterisasi dengan fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), serta X-ray diffraction (XRD) dan hasil yang didapatkan telah sesuai dengan standarisasi yang ada. Ditinjau dari pengujian karakterisasi material yaitu SEM, energy dispersive X-ray (EDX), dan XRD pada sampel mortar geopolimer hasil penelitian, mortar tersebut memiliki kandungan yang serupa dengan material penyusunnya, ditambah dengan keberadaan jaringan gel sebagai pengikat dalam mortar geopolimer. Dari hasil penelitian, diperoleh nilai densitas mortar berdasarkan ASTM C905 mengalami penurunan seiring dengan meningkatnya persentase penambahan silica fume dan menurunnya persentase penambahan GGBFS, dengan nilai maksimum didapatkan dari penambahan 5% silica fume sebesar 3618,54 kg/m3. Nilai penyerapan air mortar berdasarkan ASTM C1403 memiliki nilai maksimum pada penambahan 15% silica fume sebesar 10,8-25,66 g/100 cm2. Kekuatan tekan mortar berbanding lurus dengan nilai densitas, dengan nilai maksimum didapatkan dari penambahan 5% silica fume sebesar 57,42 MPa.
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Silica fume is a solid waste that contains high amounts of amorphous silicon dioxide and has a fine particle size of <1 μm. Therefore, silica fume can manufacture geopolymer mortar that utilizes geopolymer reaction. In this study, geopolymer mortar based on fly ash and ground granulated blast furnace slag (GGBFS) was prepared using 16 M NaOH and Na2SiO3 alkaline solution and variations of silica fume addition of 5, 10, 15, 20, and 25%. This study aimed to analyze the effect of silica fume addition on the compressive strength of geopolymer mortar. The materials used in this study were tested for characterization with fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), and X-ray diffraction (XRD), and the results obtained followed existing standards. Judging from the material characterization tests, namely SEM, energy dispersive X-ray (EDX) and XRD on the geopolymer mortar samples, the mortar has similar content to its constituent materials, coupled with the presence of a gel network as a binder in geopolymer mortar. From the results, the density value of the mortar based on ASTM C905 decreased as the percentage of silica fume addition, and the percentage of GGBFS addition decreased, with the maximum value obtained from the addition of 5% silica fume at 3618.54 kg/m3. The water absorption value of mortar based on ASTM C1403 has a maximum value at the addition of 15% silica fume of 10.8-25.66 g/100 cm2. The compressive strength of mortar is directly proportional to the density value, with the maximum value obtained from adding 5% silica fume amounting to 57.42 MPa.

Item Type:	Thesis (Other)
Additional Information:	RSMt RSMt 668.9 Fir a-1 2023
Uncontrolled Keywords:	Fly Ash, GGBFS, Kekuatan Tekan, Mortar Geopolimer, Silica Fume
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA434 Inorganic polymers T Technology > TA Engineering (General). Civil engineering (General) > TA444 Reinforced concrete T Technology > TN Mining engineering. Metallurgy > TN295 Fly ash
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Najla Hanisa Firzana
Date Deposited:	08 Feb 2023 04:43
Last Modified:	24 Aug 2023 03:25
URI:	http://repository.its.ac.id/id/eprint/96460

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