Pengaruh Urutan Penambahan Alkali Aktivator Pada Beton Geopolimer Berbahan Dasar Fly Ash Tipe C

Rachmalia, Qoyyum (2018) Pengaruh Urutan Penambahan Alkali Aktivator Pada Beton Geopolimer Berbahan Dasar Fly Ash Tipe C. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Semakin meningkatnya Teknologi beton, banyak pengguna mengarah pada beton geopolimer berbahan dasar Fly Ash. Dilain sisi, penggunaan Fly Ash Type C (ASTM C 618) yang merupakan High-Calcium Fly Ash dengan kadar CaO lebih besar dari 10% sangat jarang digunakan dalam campuran pembuatan beton. Sehingga terjadi ketimpangan pemanfaatan antara Fly Ash Type C dan Fly Ash Type F . Hal ini dikarenakan, setting time pada High-Calcium Fly Ash berlangsung cepat dikarenakan reaksi hidroliknya meningkat seiring dengan meningkatnya kadar kalsium dan lebih sulit diprediksi (Wang, 2006 dan Roberts 2007). Urutan metode pencampuran alkali aktifator ini dapat dijadikan alternatif metode pencampuran beton geopolimer dengan gravity molen berbahan dasar Fly Ash Tipe C limbah batu bara PLTU Paiton, Jawa Timur dengan tidak mereaksikan terlebih dahulu larutan NaOH dan Na2SiO3. Kuat tekan beton silinder ukuran 10cmx20cm pada umur 28 hari mencapai 44.34 Mpa dan minimal 25,48Mpa, rata-rata kuat tekan 32,23 Mpa dengan setting-time pasta selama 210 menit komposisi 100% Fly Ash. Perbandingan Agregat : Pasta (70:30), perbandingan Fly Ash : Alkali Aktivator (70:30), Perbandingan aktivator 1.00 dengan 10 M NaOH. Faktor Air Geopolimer = 0.153. ================= Increasing Concrete Technology, many users lead to Fly Ash-based geopolymer concrete. On the other hand, the use of Fly Ash Type C (ASTM C 618) which is a High-Calcium Fly Ash with CaO content greater than 10% is very rarely used in concrete-making mixtures. There are imbalance of utilization between Fly Ash Type C and Fly Ash Type F. This is because, setting time on High-Calcium Fly Ash is fast because the hydraulic reaction increases with increasing calcium level and more difficult to predict (Wang, 2006 and Roberts 2007). The sequence of alkali mixing method of this activator can be used as an alternative method of mixing geopolymer concrete based Fly Ash Type C coal waste Paiton Power Plant, East Java. Mixing of concrete using gravity molen, by solution of NaOH and Na2SiO3 are not reacted at first. The compressive strength of cylindrical concrete measuring 10cmx20cm at 28 days reaches 44.34 MPa and at least 25.48Mpa, the average compressive strength of 32.23 MPa with setting-time paste for 210 minutes of 100% Fly Ash composition. Aggregate Comparisons: Pasta (70:30), comparison Fly Ash: Alkali Activator (70:30), Comparison of 1.00 activators with 10 M NaOH. Water Geopolymer Ratio = 0,153.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Alkali Aktivator; Fly Ash; Geopolimer; Setting-Time
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials
T Technology > TA Engineering (General). Civil engineering (General) > TA440 Concrete--Cracking
T Technology > TN Mining engineering. Metallurgy > TN295 Fly ash
Divisions: Faculty of Civil Engineering and Planning > Civil Engineering > (D4) Diploma 4
Depositing User: Qoyyum Rachmalia
Date Deposited: 01 Mar 2018 06:00
Last Modified: 01 Mar 2018 06:00
URI: http://repository.its.ac.id/id/eprint/51045

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