Evaluasi Mutu Beton Geopolimer Berbasis High-Calcium Fly Ash Dengan Molaritas Naoh 10m Metode Campuran Kering

Faddli, Ali Famalil (2023) Evaluasi Mutu Beton Geopolimer Berbasis High-Calcium Fly Ash Dengan Molaritas Naoh 10m Metode Campuran Kering. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Makalah ini membahas penelitian tentang pengaruh molaritas sebesar 10M, terhadap beton geopolymer dengan menggunakan Abu Terbang (Fly Ash) tipe C. Fly Ash adalah limbah hasil pembakaran batu bara untuk pembangkit listrik tenaga uap. Limbah flay ash akan berdampak buruk pada lingkungan jika tidak ada pemanfaatan dari limbah fly ash tersebut. Sudah banyak peneliti beton geopolimer berbahan dasar flay ash yang belum memenuhi standar evaluasi mutu beton geopolimer.
Dalam penelitian ini, dibuat benda uji beton geopolymer berbentuk silinder dengan diameter 10cm dan tinggi 20cm sebanyak 30 pasang (60 pcs), dengan tujuan untuk mencari nilai standar deviasi yang akurat pada beton geopolimer dengan campuran molaritas 10. Beton ini dibuat dengan mencampurkan fly ash, activator alkali,super platicizer, kerikil, pasir dan air. Activator alkali yang digunakan berupa Natrium Hidroksida (NaOH) dan Natrium Silikat (Na2SiO3) dengan perbandingan 1:1. Dengan campuran superplazticizer (SP) merk Sika Viscocrete 3115 N, dengan kadar sebesar 5.0%, SP. Pencampuran material molaritas berupa Natrium Hidroksida (NaOH) dilakukan dengan menggunakan metode campuran kering (dry mixing). Perawatan beton dilakukan dengan menyimpan beton geopolymer kedalam wadah plastik yang tertutup selama 28 hari,
Hasil pengujian beton variasi molaritas NaOH 10 molar dengan umur 28 hari mengahasilkan mutu karakteristik sebesar 4,77 MPa, dengan standar deviasi total 1,9 MPa, standar deviasi within batch 1,814 MPa, standar deviasi batch to batch 5,103 MPa, dan koefisien variasi 24,78 %. Uji workability beton geopolimer menghasilkan nilai slump 220 mm dan sudah memenuhi syarat SNI 1972-2008, yaitu 15 mm-230 mm. Uji resisitivitas mendapatkan rata-rata 1.037 kΩcm menandakan beton memiliki tingkat korosi yang tinggi, uji permeabilitas mendapatkan rata-rata 12.064 E-16 m2 termasuk klasifikasi buruk, uji hammer mendapatkan rata-rata 19.22 MPa. Serta korelasi uji hammer dengan kuat tekan mendapatkan nilai koefisien korelasi 0.2478 yang menunjukkan korelasi yang rendah, sedangkan korelasi UPV dengan kuat tekan mendapatkan nilai koefisien korelasi 0.2297 yang menunjukkan korelasi yang rendah
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This paper discusses research on the effect of a molarity of 10M on geopolymer concrete using type C Fly Ash. Fly Ash is a waste product of burning coal for steam power plants. Fly ash waste will have a negative impact on the environment if there is no utilization of the fly ash waste. There have been many researchers of fly ash-based geopolymer concrete that have not met the quality evaluation standards of geopolymer concrete. In this study, 30 pairs (60 pcs) of cylindrical geopolymer concrete specimens were made with a diameter of 10cm and a height of 20cm, with the aim of finding an accurate standard deviation value for geopolymer concrete with a molarity mixture of 10. This concrete was made by mixing fly ash, alkaline activator, super plasticizer, gravel, sand and water. The alkaline activators used are Sodium Hydroxide (NaOH) and Sodium Silicate (Na2SiO3) with a ratio of 1:1. With a mixture of Sika Viscocrete 3115 N superplasticizer (SP), with a concentration of 5.0%, SP. Mixing the molarity material in the form of Sodium Hydroxide (NaOH) was carried out using the dry mixing method. Concrete treatment is carried out by storing geopolymer concrete in a closed plastic container for 28 days. The test results of concrete variation of NaOH 10 molar molarity with a lifespan of 28 days resulted in a characteristic quality of 4.77 MPa, with a total standard deviation of 1.9 MPa, standard deviation within batch 1.814 MPa, standard deviation batch to batch 5.103 MPa, and a coefficient of variation of 24.78%. The workability test of geopolymer concrete produces a slump value of 220 mm and has met the requirements of SNI 1972-2008, which is 15 mm-230 mm. The resitivity test got an average of 1,037 kΩcm indicating the concrete has a high corrosion level, the permeability test got an average of 12,064 E-16 m2 including poor classification, the hammer test got an average of 19.22 MPa. And the correlation hammer test with compressive strength gets a correlation coefficient value of 0.2478 which shows a low correlation, while the UPV correlation with compressive strength gets a correlation coefficient value of 0.2297 which shows a low correlation.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Alkali activator, molaritas, fly ash, dry mixing, beton geopolimer, superplasticicer; Alkali activator, molaritas, fly ash, dry mixing, geopolymer concrete, superplasticicer.
Subjects:	T Technology > TH Building construction > TH1461 Concrete construction.
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	Ali Famalil Faddli
Date Deposited:	08 Sep 2023 00:58
Last Modified:	08 Sep 2023 00:58
URI:	http://repository.its.ac.id/id/eprint/103297

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