Prototipe Semen Geopolimer dengan Berbahan Fly Ash Tipe C dan Ground Granulated Blast Furnace Slag (GGBFS)

Altiara, Sarah Dwi (2021) Prototipe Semen Geopolimer dengan Berbahan Fly Ash Tipe C dan Ground Granulated Blast Furnace Slag (GGBFS). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Perkembangan teknologi infrastruktur mempengaruhi kebutuhan semen yang semakin meningkat. Disisi lain, semen mempunyai kekurangan yaitu dapat mengeluarkan emisi gas CO2 yang akan berdampak buruk pada lapisan ozon bumi. Fly ash merupakan salah satu solusi pengganti semen karena memiliki sifat cementitious. Fly ash tipe C memiliki CaO yang cukup tinggi sehingga dapat menghasilkan produk dengan kuat tekan yang tinggi. Selain fly ash, Ground Granulated Blast Furnace Slag (GGBFS) merupakan limbah material yang memiliki Si, Al, dan Ca yang tinggi. Penambahan Ground Granulated Blast Furnace Slag (GGBFS) pada fly ash diharapkan dapat meningkatkan kualitas benda uji.
Metode yang digunakan pada penelitian ini yaitu metode pencampuran kering dimana menggunakan alkali aktivator dalam bentuk padat. Fly ash, Ground Granulated Blast Furnace Slag (GGBFS), dan aktivator padat dicampur sehingga menghasilkan semen geopolimer kemudian diberi air saat pengecoran. GGBFS memilik sifat cementitious layaknya semen yang dapat berfungsi sebagai bahan perekat agregat. Komposisi semen geopolimer ini memiliki beberapa perbandingan rasio pada fly ash dan GGBFS yaitu 0:100, 5:95, 10:90, 15,85, dan 20:80. Penelitian ini bertujuan untuk menemukan komposisi optimum dari fly ash dan GGBFS. Pengujian yang dilakukan pada material penyusun adalah XRF, XRD, dan SEM-EDX. Pengujian yang dilakukan pada benda uji yaitu setting time (waktu ikat), kuat tekan, UPV, porositas, dan resistivity.
Hasil pengujian setting time pada pasta geopolimer menjadi lebih cepat seiring dengan bertambahnya kadar GGBFS. Variasi 10% GGBFS 90% fly ash, variasi 15% GGBFS 85% fly ash, dan variasi 20% GGBFS 80% fly ash menunjukkan waktu ikat yang singkat dimana tidak memenuhi standar SNI 2049-2015. Hasil kuat tekan menunjukkan variasi 15% GGBFS 85% fly ash dan 20% GGBFS 80% fly ash memiliki kuat tekan yang lebih tinggi daripada variabel kontrol (100% fly ash). Pengujian UPV, resistivity, dan porositas juga menunjukkan hal yang sama dengan pengujian kuat tekan dimana variasi 15% GGBFS 85% fly ash dan 20% GGBFS 80% fly ash menunjukkan hasil yang lebih baik.
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The development of infrastructure technology affects the increasing demand for cement. On the other hand, cement has a disadvantage, namely that it can emit CO2 gas which will have a negative impact on the earth's ozone layer. Fly ash is a cement substitute solution because it has cementitious properties. Type C fly ash has a high enough CaO so that it can produce products with high compressive strength. Besides fly ash, Ground Granulated Blast Furnace Slag (GGBFS) is a waste material that has high Si, Al, and Ca. The addition of Ground Granulated Blast Furnace Slag (GGBFS) to fly ash is expected to improve the quality of the specimens
The method used in this research is the dry mixing method which uses an alkaline activator in solid form. Fly ash, Ground Granulated Blast Furnace Slag (GGBFS), and solid activator are mixed to produce geopolymer cement which is then given water during casting. GGBFS has cementitious properties like cement which can function as an adhesive for aggregates. The composition of this geopolymer cement has several ratios on fly ash and GGBFS, namely 0: 100, 5:95, 10:90, 15.85, and 20:80. This study aims to find the optimum composition of fly ash and GGBFS. Tests carried out on the constituent materials are XRF, XRD, and SEM-EDX. Tests carried out on the test object are setting time (binding time), compressive strength, UPV, porosity, and resistivity.
The result of setting time test on the geopolymer paste becomes faster as the GGBFS content increases. Variation of 10% GGBFS 90% fly ash, variation of 15% GGBFS 85% fly ash, and variation of 20% GGBFS 80% fly ash indicate a short tie time which does not meet SNI 2049-2015 standards. The compressive strength results show that the variation of 15% GGBFS 85% fly ash and 20% GGBFS 80% fly ash has a higher compressive strength than the control variable (100% fly ash). The UPV, resistivity, and porosity tests also showed the same thing with the compressive strength test where the variation of 15% GGBFS 85% fly ash and 20% GGBFS 80% fly ash showed better results.
Keyword : geopolymer, fly ash type C, Ground Granulated Blast Furnace Slah (GGBFS), dry mixing

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	geopolimer, fly ash tipe C, Ground Granulated Blast Furnace Slag (GGBFS), pencampuran kering, geopolymer, fly ash type C, Ground Granulated Blast Furnace Slag (GGBFS), dry mixing
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction > TH880 Sustainable buildings. Sustainable construction. Green building T Technology > TN Mining engineering. Metallurgy > TN295 Fly ash T Technology > TN Mining engineering. Metallurgy > TN677 Blast furnaces.
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D3)
Depositing User:	Sarah Dwi Altiara
Date Deposited:	10 Mar 2021 01:48
Last Modified:	10 Mar 2021 01:48
URI:	http://repository.its.ac.id/id/eprint/83504

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