Analisis Pengaruh Penambahan Rice Husk Ash Terhadap Kuat Tekan Mortar Geopolimer Berbasis Fly Ash Dan Ground Granulated Blast Furnace Slag

Firdaus, Safana Nada (2023) Analisis Pengaruh Penambahan Rice Husk Ash 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

Rice Husk Ash (RHA) tersusun dari lebih 90% silika (SiO2). Sehingga, material ini berpotensi sebagai bahan pozzolan untuk menggantikan semen. Penelitian ini bertujuan untuk mengetahui pengaruh kuat tekan mortar geopolimer berbasis fly ash dan GGBFS dengan penambahan RHA. Mortar geopolimer berbasis fly ash dan GGBFS dibuat dengan penambahan RHA 0%, 5%, 10%, 15%, 20%, dan 25% yang diaktivasi larutan alkali dan dikenakan perlakuan oven curing pada temperatur 60℃ selama 24 jam. Karakterisasi komposisi, struktur dan gugus fungsi dari tiap material fly ash, GGBFS, dan RHA diuji menggunakan X-Ray Fluoresence (XRF), X-Ray Diffraction (XRD), dan Fourier Transform Infra Red (FTIR). Morfologi dari sampel diuji menggunakan Scanning Electron Microscopy – Energy Dispersive-X (SEM-EDX). Pengujian kuat tekan dari sampel diuji menggunakan Universal Testing Machine (UTM). Selain itu juga dilakukan uji densitas dan water absorption untuk karakterisasi fisik. Hasil pengujian karakterisasi material dengan metode XRF, XRD, dan FTIR pada masing-masing material prekursor telah sesuai dengan ASTM C618 sebagai pozzolan, dan fly ash yang digunakan sudah sesuai fly ash tipe C. Pada hasil uji XRD dan SEM-EDX untuk sampel mortar, didapatkan hasil senyawa yang serupa dengan material penyusun mortar. Didapatkan hasil uji densitas tertinggi pada mortar variasi RHA 5% sebesar 3548,38 ± 348,64 kg/m3. Untuk pengujian water absorption nilai optimum ada pada mortar variasi RHA 5% sebesar 11,64 ± 1,39 gr/100cm2 - 24,79 ± 1,09 gr/100cm2. Sedangkan, uji kuat tekan rata-rata tertinggi pada mortar variasi RHA 5% pada umur 56 hari sebesar 52,99 ± 1,30 MPa. Rasio optimun penambahan RHA pada mortar geopolimer berbasis fly ash dan GGBFS sebesar 5%. Peningkatan nilai kuat tekan mortar berbanding lurus dengan peningkatan nilai densitasnya. Selain itu, kuat tekan mortar akan mengalami peningkatan seiring bertambahnya waktu curing, namun akan mengalami penurunan seiring bertambahnya presentase RHA dalam mortar.
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Rice Husk Ash (RHA) comprises over 90% silica (SiO2). This material has the potential as a pozzolanic material to replace cement. This study aims to determine the effect of the compressive strength of geopolymer mortar based on fly ash and GGBFS with the addition of RHA. Fly ash and GGBFS-based geopolymer mortars were made with the addition of 0%, 5%, 10%, 15%, 20%, and 25% RHA activated by alkaline solution and subjected to oven curing treatment at 60℃ for 24 hours. Characterization of the composition, structure and functional groups of each fly ash, GGBFS, and RHA material was tested using X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD), and Fourier Transform Infra-Red (FTIR). The morphology of the samples was tested using Scanning Electron Microscopy - Energy Dispersive-X (SEM-EDX). The morphology of the samples was tested using Scanning Electron Microscopy - Energy Dispersive-X (SEM-EDX). The compressive strength of the samples was tested using a Universal Testing Machine (UTM). In addition, density and water absorption tests were also conducted for physical characterization. The results of material characterization testing by XRF, XRD, and FTIR methods on each precursor material follow ASTM C618 as pozzolan, and the fly ash follows type C fly ash. Similar compound results were obtained with mortar constituent materials in the XRD and SEM-EDX test results for mortar samples. The highest density test results were obtained in the 5% RHA variation mortar of 3548.38 ± 348,64 kg/m3. The optimum value for the water absorption test was in the 5% RHA variation mortar at 11,64 ± 1,39 gr/100cm2 - 24,79 ± 1,09 gr/100cm2. Meanwhile, the highest average compressive strength test on 5% RHA variation mortar at 56 days amounted to 52,99 ± 1,30 MPa. The optimal ratio of RHA addition to geopolymer mortar based on fly ash and GGBFS is 5%. The increase in compressive strength of mortar is directly proportional to the increase in density. Furthermore, the compressive strength of mortar will increase as the curing time increases but decrease as the percentage of RHA in mortar increases.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Mortar Geopolimer, Geopolimer, Fly ash, GGBFS, RHA, Geopolymer Mortar, Geopolymer
Subjects:	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:	Safana Nada Firdaus
Date Deposited:	07 Feb 2023 17:17
Last Modified:	07 Feb 2023 17:17
URI:	http://repository.its.ac.id/id/eprint/96463

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