Peningkatan Kinerja Beton Hijau Dengan Aplikasi High Volume Fly Ash, Bottom Ash, Filler, Dan Mikroba

Sauri, Muhammad Sofyan (2022) Peningkatan Kinerja Beton Hijau Dengan Aplikasi High Volume Fly Ash, Bottom Ash, Filler, Dan Mikroba. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Beroperasinya beberapa PLTU batu bara di Indonesia meningkatkan pemakaian batu bara secara signifikan. Dari penggunaan batu bara itu, dihasilkan limbah batu bara berupa fly ash dan bottom ash (FABA). Limbah ini disimpan dalam bentuk timbunan atau endapan, yang dapat mencemari lingkungan. Salah satu inovasi yang dapat memanfaatkan FABA dalam jumlah besar adalah aplikasi beton HVFA (High Volume Fly ash). Penelitian ini dilakukan untuk meningkatkan kinerja beton HVFA, dengan menggabungkan beberapa perlakuan. Perlakuan tersebut meliputi penggantian sebagian pasir dengan bottom ash, penambahan filler dan mikroba Bioconc. Filler yang digunakan terdiri dari CaCO3 dan Ground Granulated Blast Furnace Slag (GGBFS). Mix design dihitung berdasarkan ACI 211.1-91 dengan target kuat tekan rencana 25 MPa. Kuat tekan tertinggi pada umur 28 hari dicapai oleh beton normal, yaitu 31,3 MPa. Namun, pada umur 56 hari, kuat tertinggi dicapai oleh beton HVFA 10% dengan perlakuan lengkap, yaitu 33,3 MPa. Diperoleh kesimpulan bahwa peningkatan kadar fly ash dalam binder dapat menurunkan kuat tekan, memperlama waktu setting dan menurunkan suhu hidrasi karena kadar semen semakin sedikit. Selain itu, semakin banyak fly ash dapat meningkatkan workability beton segar, sehingga penggunaan superplasticizer dapat dikurangi. Beberapa perlakuan tersebut terbukti dapat meningkatkan kinerja beton HVFA. Penggantian sebagian pasir dengan bottom ash dapat meningkatkan kuat tekan dan menurunkan suhu puncak hidrasi. Penambahan filler dapat meningkatkan kadar pori tertutup dalam beton, mempercepat mulainya initial setting, meningkatkan suhu puncak hidrasi, dan memperbesar susut yang terjadi dalam beton. Sedangkan penambahan mikroba dapat mengurangi kadar pori total dalam beton, memperlambat mulainya initial setting, menurunkan suhu puncak hidrasi, dan memperkecil susut yang terjadi akibat aktivitas mikroba dalam beton. Kedua material tersebut dapat saling menyeimbangkan dan bekerja secara simultan untuk meningkatkan kuat tekan, kuat belah, dan menyeimbangkan workability.
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The operation of several coal-fired power plants in Indonesia has significantly increased the use of coal. From the use of coal, coal waste is generated in the form of fly ash and bottom ash (FABA). This waste is stored in the form of heaps or deposits, which can pollute the environment. One of the innovations that can utilize FABA in large quantities is the application of HVFA (High Volume Fly ash) concrete. This research was conducted to improve the performance of HVFA concrete, by combining several treatments. The treatment includes partial replacement of sand with bottom ash, addition of fillers and Bioconc microbes. The filler used consisted of CaCO3 and Ground Granulated Blast Furnace Slag (GGBFS). The mix design is calculated based on ACI 211.1-91 with a target compressive strength of 25 MPa. The highest compressive strength at the age of 28 days was achieved by normal concrete, which was 31.3 MPa. However, at the age of 56 days, the highest strength was achieved by 10% HVFA concrete with complete treatment, which was 33.3 MPa. It was concluded that increasing the fly ash content in the binder could reduce the compressive strength, prolong the setting time and lower the hydration temperature because the cement content was getting smaller. In addition, more fly ash can increase the workability of fresh concrete, so that the use of superplasticizers can be reduced. Some of these treatments are proven to improve the performance of HVFA concrete. Replacing some of the sand with bottom ash can increase the compressive strength and decrease the peak hydration temperature. The addition of filler can increase the closed pore content in the concrete, accelerate the initial setting, increase the hydration peak temperature, and increase the shrinkage that occurs in the concrete. Meanwhile, the addition of microbes can reduce the total pore content in the concrete, slow down the initial setting, reduce the peak hydration temperature, and reduce shrinkage that occurs due to microbial activity in the concrete. The two materials can balance each other and work simultaneously to increase compressive strength, split strength, and balance workability.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Beton hijau, CaCO3, NaOH, GGBFS, mikroba, Green concrete, CaCO3, NaOH, GGBFS, microbes
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA681 Concrete construction
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	09 Jan 2026 02:37
Last Modified:	09 Jan 2026 02:37
URI:	http://repository.its.ac.id/id/eprint/129401

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