Widayanti, Ari (2021) Reclaimed Asphalt Pavement, Agregat Buatan Dan Filler Berbahan Dasar Coal Ash Untuk Lapisan Perkerasan Jalan. Doctoral thesis, Institut Teknologi Sepuluh Nopember.
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03111660010006 - Disertation.pdf - Accepted Version Restricted to Repository staff only until 1 October 2023. Download (3MB) | Request a copy |
Abstract
Jalan merupakan infrastruktur transportasi yang penting untuk mendukung aktivitas masyarakat dan pengembangan wilayah. Pembangunan jalan membutuhkan material yang cukup. Material alam semakin terbatas, oleh karena itu pemanfaatannya harus dihemat dan inovasi material baru dibutuhkan.
Salah satu inovasi adalah pemanfaatan material limbah. Reclaimed Asphalt Pavement (RAP) merupakan material hasil pengupasan lapisan perkerasan jalan. Potensi RAP di Jawa Timur berkisar 50.000 m3/tahun. Kelemahan RAP yaitu agregat RAP tidak masuk dalam kurva gradasi AC-BC Spesifikasi Bina Marga.
Coal ash merupakan limbah hasil pembakaran batu bara PLTU, terdiri dari fly ash dan bottom ash. Produksi coal ash PLTU Suralaya semakin bertambah sekitar 2,7 juta ton/tahun, dan diprediksikan mencapai 11,2 juta ton/tahun. Penumpukan material ini memunculkan ide untuk membuat agregat buatan berbahan fly ash, dan filler berbahan coal ash, sehingga kurva gradasi agregat RAP dapat terpenuhi.
Tujuan penelitian ini adalah menentukan penggunaan RAP, agregat buatan dan filler berbahan dasar coal ash untuk lapisan perkerasan jalan. Metode penelitian dengan ekstraksi RAP untuk memisahkan agregat dan aspal, sehingga diperoleh kadar aspal RAP dan gradasi agregat RAP. Kekurangan gradasi agregat RAP diatasi dengan penambahan agregat buatan berbahan fly ash dan aktivator alkali. Agregat buatan dibentuk dengan mesin crusher. Benda uji dibuat dengan variasi persentase RAP. Uji karakteristik material meliputi XRF dan SEM. Uji kekuatan campuran menggunakan Tes Marshall.
Hasil yang diperoleh adalah karakteristik agregat RAP memenuhi spesifikasi. Gradasi agregat RAP terpenuhi dengan penambahan agregat buatan dan filler. Aspal RAP tidak memenuhi syarat pada penetrasi rendah dan viskositas terlalu tinggi. Aspal RAP keras dan getas, karena mengalami penuaan dan perubahan sifat. Karakteristik agregat buatan yaitu permukaan kasar, penyerapan air tinggi, bentuk kubus, lebih ringan. Daya lekat aspal terhadap agregat buatan rendah, karena kandungan silikat tinggi pada agregat buatan, sehingga mudah menyerap air. Fly ash memenuhi syarat spesifikasi filler sehingga bisa digunakan pada campuran secara langsung. Komposisi campuran terbaik berdasarkan persentase RAP adalah 40% RAP, 5% filler, 55% agregat buatan dan aspal. Campuran ini menghasilkan stabilitas tertinggi, fleksibel, dan awet.
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Road is an important transportation infrastructure to support community activities and regional development. Road construction requires sufficient material. The availability of natural material is increasingly limited therefore its utilization must be saved and innovation of new materials is required.
One of the innovations is the utilization of potential waste materials. Reclaimed Asphalt Pavement (RAP) is material from asphalt pavement stripping. RAP potential in East Java is around 50,000 m3/year. The weakness of RAP is that the RAP aggregate is not included in the AC-BC gradation curve.
Coal ash is a waste product of the burning of coal from the power plant industry, it consists of fly ash and bottom ash. Coal ash production from Suralaya Power Plant continues to grow by around 2.7 million tons/year, and is predicted to reach 11.2 million tons/year. This high accumulation of material can be used for construction material. This led to the idea of making artificial aggregate from fly ash, and fillers from coal ash so that the RAP aggregate grading curve can be fulfilled.
This study aimed to determine the use of RAP, artificial aggregates and fillers from coal ash for road pavement layers. The research method was to perform RAP extraction to separate aggregate and asphalt, to obtain RAP asphalt content and RAP aggregate gradation. The lack of RAP aggregate gradation was overcome by adding artificial aggregate from fly ash and alkali activator. The specimens were made by varying the percentage of RAP and variations of filler material. Material characteristic tests included XRF and SEM. The mix strength test used Marshall Test.
The results obtained are the characteristics of the RAP aggregate that meet the specifications. RAP aggregate gradation is fulfilled by adding artificial aggregate and filler. RAP asphalt does not meet the requirements, namely low penetration and too high viscosity. RAP asphalt is hard and brittle, due to changes in properties and aging. The characteristics of artificial aggregate resulting from the crusher machine are rough surface, high water absorption, cube shape, lighter. The adhesion of asphalt to artificial aggregates is low. This is due to the high silicate content in the artificial aggregate, making it easy to absorb water. Fly ash meets the requirements of filler specifications so that it can be used directly in the mixture. Bottom ash and geopolymer powder must be crushed and sieved so that they meet the filler specification. The best composition based on the RAP percentage is 40% RAP, 5% filler, 55% artificial aggregate and asphalt. It provides the highest stability, flexibility, and durability.
| Item Type: | Thesis (Doctoral) |
|---|---|
| Uncontrolled Keywords: | reclaimed asphalt pavement, artificial aggregate, road pavement, reclaimed asphalt pavement, agregat buatan, fly ash, perkerasan jalan. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA443.A7 Asphalt T Technology > TE Highway engineering. Roads and pavements > TE251.T74 Pavements--Design and construction |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22001-(S3) PhD Thesis |
| Depositing User: | ARI WIDAYANTI |
| Date Deposited: | 01 Sep 2021 07:23 |
| Last Modified: | 01 Sep 2021 07:23 |
| URI: | http://repository.its.ac.id/id/eprint/91647 |
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