Studi Komposisi Campuran Bata Ringan Berbahan Dasar Fly Ash dan Bottom Ash (FABA) dengan Metode Non-Autoclaved : Moist Curing

Arisa, Ana Wildatun Hafidhoh (2024) Studi Komposisi Campuran Bata Ringan Berbahan Dasar Fly Ash dan Bottom Ash (FABA) dengan Metode Non-Autoclaved : Moist Curing. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Seiring dengan berkembangnya teknologi dan pengetahuan, pemanfaatan limbah hasil pembakaran batu bara berupa fly ash dan bottom ash yang selanjutnya disebut FABA telah diteliti sebagai campuran material bata ringan. Industri bata ringan menggunakan konsep aerated concrete dengan metode curing autoclave. Berdasarkan SNI 8640:2018 produk bata ringan pasaran termasuk kategori berat 500 kg/m3 yaitu densitas yang berada dikisaran 400 – 600 kg/m3. Namun, proses autoklaf ini memerlukan teknisi khusus dan biaya yang besar. Penggunaan metode moist curing merupakan alternatif dalam proses produksi bata ringan. Oleh karena itu, untuk menghasilkan produk bata ringan yang mudah dilaksanakan dengan biaya yang murah dan densitas yang tidak jauh dengan produk pasaran, penelitian ini membahas terkait studi komposisi bata ringan berbahan dasar fly ash dan bottom ash menggunakan metode moist curing dengan densitas rencana 600 - 800 kg/m3.
Tahapan pelaksanaan penelitian ini dimulai dari persiapan material, perencanaan mix design awal, penentuan komposisi, pembuatan dan pengujian benda uji. Spesimen yang digunakan adalah kubus dengan ukuran 100 x 100 x 100 mm dan 40 x 40 x 160 mm yang ditinjau performanya berdasarkan SNI 8640:2018. Pengujian spesimen dilakukan saat umur 7,14, dan 28 hari yang terdiri dari pengujian densitas, kuat tekan, penyerapan air, dan susut pengeringan. Metode pengujian densitas, kuat tekan, dan susut pengeringan mengacu pada ASTM C1693-11 dan pengujian penyerapan air mengacu pada ASTM 796.
Hasil penelitian ini menunjukkan bahwa komposisi material untuk Bata Ringan FABA menggunakan moist curing dengan densitas rencana 600 - 800 kg/m3 adalah 349,06 kg /m3 semen; 45,83 kg/m3 fly ash; 98,7 kg/m3 bottom ash; 356,04 kg/m3 air; dan 0,3496 kg/m3 aluminum powder. Dengan komposisi tersebut, didapatkan performa bata ringan dengan densitas 28 hari 761,77 kg/m3, kuat tekan 3,07 Mpa umur 28 hari, kemampuan menyerap air yaitu 27,05% umur 28 hari. Bata ringan dengan performa ini dikategorikan pada kelas IIB dengan kategori berat 700 kg/m3. Namun, hasil susut pengeringan berada diatas 0,2% sehingga, tidak memenuhi standar SNI 8640:2018 yaitu dibawah 0,2%. Dari segi kualitas Bata Ringan FABA menggunakan moist curing tidak lebih baik dari bata ringan dengan curing autoklaf.
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Along with the development of technology and knowledge, the use of waste from coal combustion in the form of fly ash and bottom ash, hereinafter referred to as FABA, has been researched as a mixture of light brick materials. The light brick industry uses the concept of aerated concrete with the curing autoclave method. Based on SNI 8640:2018, light brick products on the market are included in the weight category of 500 kg/m3, namely a density in the range of 400 – 600 kg/m3. However, this autoclave process requires specialized technicians and large costs. The use of the moist curing method is an alternative in the light brick production process. Therefore, in order to produce lightweight brick products that are easy to implement at a low cost and density that is not far from market products, this study discusses the study of the composition of light bricks made from fly ash and bottom ash using the moist curing method with a planned density of 600 - 800 kg/m3.
The stages of implementing this research start from material preparation, initial mix design planning, composition determination, manufacturing and testing of test pieces. The specimens used were cubes with dimensions of 100 x 100 x 100 mm and 40 x 40 x 160 mm whose performance was reviewed based on SNI 8640:2018. Specimen testing was carried out at the age of 7, 14, and 28 days which consisted of testing density, compressive strength, water absorption, and drying shrinkage. The density, compressive strength, and drying shrinkage test methods refer to ASTM C1693-11 and the water absorption test refers to ASTM 796.
The results of this study show that the material composition for FABA Lightweight Brick using moist curing with a planned density of 600 - 800 kg/m3 is 349,06 kg/m3 cement; 45,83 kg/m3 fly ash; 98,72 kg/m3 bottom ash; 356,04 kg/m3 water; and 0,3496 kg/m3 aluminum powder. With this composition, the performance of light brick with a density of 28 days is 761,77 kg/m3, compressive strength of 3,07 Mpa is 28 days old, water absorption ability is 27,05% of 28 days old. Lightweight bricks with this performance are categorized in class IIB with a weight category of 700 kg/m3. However, the drying shrinkage is above 0,2%, so it does not meet the SNI 8640:2018 standard, which is below 0,2%. In terms of quality, FABA Lightweight Bricks using moist curing are no better than lightweight bricks with autoclave curing.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Fly Ash, Bottom Ash, Moist Curing, Densitas, Kuat Tekan, Penyerapan Air, Susut Pengeringan Fly Ash, Bottom Ash, moist curing, Density, Compressive Strength, Water Absorption, Drying Shrinkage
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA439 Lightweight concrete. High strength concrete.
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	Ana Wildatun Hafidhoh Arisa
Date Deposited:	10 Aug 2024 07:09
Last Modified:	10 Aug 2024 07:09
URI:	http://repository.its.ac.id/id/eprint/113099

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