Studi Parametrik Mortar Geopolimer Hybrid Abu Sawit (Palm Oil Fuel Ash/POFA)

Yanuari, Ramadhan; Ikrammullah, Muhammad; Septari, D.; Wijaya, Miguel Felix; Olivia, Monita

doi:10.21776/ub.rekayasasipil.2020.014.02.1

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…Pada penelitian ini dilakukan penambahan abu cangkang kelapa sawit sebanyak 5%. Jumlah penambahan sebanyak 5% dipilh karena beberapa penelitian mengenai penambahan material menggunakan jumlah yang sama (Yanuari, 2020dan Fernando, 2018. Konsentrasi larutan natrium hidroksida yang digunakan pada penelitian ini adalah sebesar 12 molaritas.…”

Section: Metode Penelitianunclassified

Peningkatan Kuat Tekan Pada Beton Geopolimer Akibat Metode Perawatan Dipanaskan

Wibowo,

Christianto,

Widjajakusuma

2024

j. mitra teknik sipil

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Studies about pozzolan material to reduce cement usage have been conducted for many times. Concrete made of pozzolan material was known as geopolymer concrete. Geopolymer concrete’s weaknesses were low duration of setting time and the low level of workability. The precast method was used to overcome these weaknesses. Concrete with a high initial compressive strength enable a more efficient implementation of the precast method due to it able to be released from the formwork without getting damaged. This study aims to see the increase in compressive strength due to the method of dry curing. In addition to that, differing from the geopolymer concrete without palm oil fuel ash, this study added 5% of palm oil fuel ash to see the effect of it on compressive strength. Constructed specimens were then cured at room temperature or heated in an oven with a temperature of 60°C for 24 hours. The ratio of alkaline activator to fly ash that were used in this research are 0,55:1 and 0,825:1. The specimen which was only a day old with 0,55:1 ratio experienced 2 times increase in compressive strength when being heated compared to the specimen cured at room temperature. The specimen which was of the same age with 0,825:1 ratio also experienced 3,5 times increase in compressive strength after being heated compared to those at room temperature. The increase of compressive strength was due to the heating process enabling the chemical reaction to occur faster. Abstrak Penelitian untuk memanfaatkan material pozzolan untuk mengurangi penggunaan semen sudah banyak dilakukan. Beton yang menggunakan material pozzolan disebut beton geopolimer. Kelemahan dari beton geopolimer adalah durasi setting time dan tingkat kelecakan yang rendah. Oleh karena itu, metode pracetak dapat digunakan untuk mengatasi kelemahan tersebut. Beton dengan kuat tekan awal yang tinggi dapat membuat metode pracetak semakin efisien karena beton dapat dilepaskan dari bekisting dan tidak rusak. Penelitian ini bertujuan untuk melihat peningkatan kuat tekan akibat metode perawatan benda uji dengan cara dipanaskan. Selain itu, pada penelitian ini ditambahkan abu cangkang kelapa sawit sebanyak 5% untuk dilihat pengaruhnya terhadap kuat tekan dibanding beton geopolimer tanpa abu cangkang kelapa sawit. Benda uji yang sudah dibuat, dirawat pada suhu ruangan atau dipanaskan pada oven dengan suhu 60°C selama 24 jam. Rasio alkali aktivator terhadap abu terbang yang digunakan pada penelitian ini adalah 0,55:1 dan 0,825:1. Hasil peningkatan kuat tekan yang didapat pada saat benda uji berumur 1 hari adalah benda uji dengan rasio 0,55:1 yang dipanaskan mengalami peningkatan kuat tekan sekitar 2 kali dan pada rasio 0,825:1 mengalami peningkatan kuat tekan sekitar 3,5 kali dibanding benda uji yang dirawat pada suhu ruangan. Hal itu disebabkan oleh pemanasan benda uji membuat reaksi kimia terjadi lebih cepat dan kuat tekan meningkat.

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Section: Metode Penelitianunclassified

Peningkatan Kuat Tekan Pada Beton Geopolimer Akibat Metode Perawatan Dipanaskan

Wibowo,

Christianto,

Widjajakusuma

2024

j. mitra teknik sipil

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“…Hal ini dikarenakan belum diperoleh proporsi secara tepat dalam penggunaan fly ash dan bottom ash [9]. Disisi lain, hal ini sangat dibutuhkan untuk mengurangi jumlah limbah dalam suatu daerah terutama di PLTU Tanjung Jati B Jepara.…”

Section: Pendahuluanunclassified

Menentukan Proporsi Campuran Mortar yang Tepat dengan Pemanfaatan Limbah Fly Ash dan Bottom Ash Ditinjau dari Kuat Tekan

et al. 2022

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The increase in the amount of fly ash and bottom ash waste every year requires proper management and utilization. In the manufacture of concrete, the use of fly ash and bottom ash can be used as a substitute material. However, it has not been utilized in making species in construction. This is because the exact proportion has not been obtained. The purpose of this study was to determine the correct proportions in the mortar with a mixture of fly ash and bottom ash. The research was carried out using experimental methods in the laboratory with cube-shaped specimens (5 x 5 x 5 cm) with 2 kinds of ratios between binder and fine aggregate, namely 1:2 and 1:4, each having a different percentage of sand and bottom ash, starting from from 20% to 80%. While the fly ash used is 10%. Tests carried out included material tests (Metal Oxidation Concentration Test and Sieve Analysis), and compressive strength tests (14 and 28 days). The results showed that the highest mortar compressive strength was at a ratio of 1:2 with fly ash as a cement mixture of 10% and bottom ash as a sand mixture of 20% with a compressive strength value of 16.8 MPa at the age of the specimen 28 days. The compressive strength value is in accordance with the provisions of SNI 03-6825-2002. The results of this study can be used by the community in making plaster work and can reduce the amount of waste that exists today.

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