Pemanfaatan Limbah Pyrite PLTU Paiton sebagai Agregat Halus untuk Bahan Perkerasan AC-WC

Indriani, Caecilia Meiay (2025) Pemanfaatan Limbah Pyrite PLTU Paiton sebagai Agregat Halus untuk Bahan Perkerasan AC-WC. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Dalam dekade terakhir, panjang jalan di Indonesia mengalami peningkatan signifikan sebesar 54,07%, mencapai 548,4 ribu kilometer pada tahun 2021. Pembangunan infrastruktur jalan yang pesat ini memerlukan material berkualitas tinggi untuk memastikan masa layan yang panjang. Di sisi lain, Pembangkit Listrik Tenaga Uap (PLTU) Paiton menggunakan pulverizer atau mill untuk menggiling batubara menjadi lebih halus sehingga pembakaran menjadi lebih sempurna. Hasil dari batubara yang tidak dapat digiling tersebut akan menjadi limbah pyrite yang ditampung dalam pyrite system. Pada penelitian ini, limbah pyrite digunakan sebagai agregat halus dalam campuran laston AC-WC. Penggunaan limbah pyrite sebagai agregat halus digunakan sebagai alternatif pengganti penggunaan material alami seperti pasir yang semakin terbatas ketersediaannya. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan limbah pyrite yang paling optimum terhadap kinerja aspal. Kinerja campuran aspal ditinjau berdasarkan karakteristik Marshall. Variasi kadar limbah pyrite yang digunakan dalam campuran adalah 0%, 10%, 30%, 60%, dan 80% dari total berat agregat halus. Hasil penelitian menunjukan kadar aspal optimum pada campuran AC-WC tanpa modifikasi setelah pengujian Marshall adalah 6,33%. Penambahan limbah pyrite cenderung meningkatkan nilai stabilitas dan marshall quotient. Nilai stabilitas dan marshall quotient tertinggi berada pada variasi persentase pyrite 30% 1071,430 kg dengan nilai marshall quotient 358,094 kg/mm dan mengalami penurunan setelah variasi persentase pyrite 30%. Persentase pyrite paling optimum berada pada variasi pyrite 30%, penggunaan limbah pyrite diatas 30% mengakibatkan parameter VIM dan VFA tidak memenuhi spesifikasi. Hal tersebut disebabkan karena gradasi diatas variasi persentase pyrite 30% terlalu halus sehingga partikel halus menyerap sebagian besar aspal untuk melapisi permukaannya, namun tidak cukup mengisi rongga antar agregat secara efektif yang menyebabkan lebih banyak rongga di antara partikel.
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Over the past decade, the total road length in Indonesia has increased significantly by 54.07%, reaching 548.4 thousand kilometers in 2021. This rapid infrastructure development demands high-quality materials to ensure long service life. On the other hand, Paiton Steam Power Plant (PLTU) utilizes a pulverizer or mill to grind coal into finer particles for more efficient combustion. The ungrindable residue from this process becomes pyrite waste, which is collected in the pyrite system. In this study, pyrite waste is used as a fine aggregate in Asphalt Concrete Wearing Course (AC-WC) mixtures. The use of pyrite waste serves as an alternative to natural fine aggregates such as sand, which are increasingly limited in availability. This research aims to determine the optimal proportion of pyrite waste that can improve the performance of asphalt mixtures. The performance is evaluated based on Marshall characteristics. The variations of pyrite waste content used in the mixtures are 0%, 10%, 30%, 60%, and 80% of the total fine aggregate weight. The results show that the optimum asphalt content in the unmodified AC-WC mixture, based on the Marshall test, is 6.33%. The addition of pyrite waste tends to increase the stability and Marshall quotient values. The highest stability and Marshall quotient were obtained at 30% pyrite content, with values of 1071.430 kg and 358.094 kg/mm, respectively. However, the performance began to decline beyond the 30% pyrite content. This is due to the excessively fine gradation, which causes the fine particles to absorb a significant amount of asphalt for coating, but fails to fill the voids between aggregate particles effectively, resulting in higher air voids. The optimal pyrite content was found at 30%, as mixtures with higher pyrite content did not meet the VIM and VFA specifications.

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	Aspal, Limbah Pyrite, Batubara, Agregat Halus, Stabilitas Marshall, Infrastruktur Jalan, PLTU, Asphalt, AC-WC, Pyrite Waste, Coal, Fine Aggregate, Marshall Stability, Road Infrastructure, Steam Power Plant
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA418.16 Materials--Testing. T Technology > TA Engineering (General). Civil engineering (General) > TA433 Strength of materials. T Technology > TA Engineering (General). Civil engineering (General) > TA441 Aggregates T Technology > TA Engineering (General). Civil engineering (General) > TA443.A7 Asphalt
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	Caecilia Meiay Indriani
Date Deposited:	04 Aug 2025 01:14
Last Modified:	11 Aug 2025 02:54
URI:	http://repository.its.ac.id/id/eprint/125806

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