Generally, porous asphalt mixtures are having low stability and highly dependent on the quality of asphalt as an aggregate binder, so the innovation of using additive needs to be examined to produce high quality asphalt. In this study, the additive used in asphalt mixtures is plastic bottle waste (Polyethylene Terephthalate/PET) and the use of coconut-shell ash (CS) as filler. This study aims to find out the influence of using PET waste and CS in asphalt porous mixtures which meets its parameter of Cantabro Loss (CL), Asphalt Flow Down (AFD), Marshall and permeability test on 60/70 asphalt penetration. Its benefit is to discover the influence of adding PET and ATK. In this research, the variation of asphalt content was made to obtain Optimum Asphalt Content (OAC) of 4.5%, 5.0%, and 6.0%. Australian Asphalt Pavement Association (AAPA) method was used to determine OAC including CL, AFD, and Void in Mix (WIM) test. After OAC was determined, OAC specimen with the variation of 0%, 2%, 4% and 6% PET substitute on asphalt weight, and the use of 50% combination of CS and portland cement from the total weight of filler were made. At OAC value of 5.74%, it is obtained that the value of CL, AFD, Marshall and permeability which meet the AAPA specifications is in the addition of 2% and 4% PET in PA mixture.
The aim of this research is to evaluate the physical properties of bitumen binder incorporating eggshell ash (ESA). Using ESA in bitumen was investigated as an alternative, as an additive in potential paths to landfill disposal and for improving the service physical properties of bitumen binder. Four different contents of ESA (2%, 5%, 7%, and 10%) were used by weight of bitumen with a 60/70 penetration grade. Several laboratory tests, i.e., penetration, softening point, ductility, viscosity, and specific gravity, were conducted to check the performance of the ESA. The results showed that the specimens with higher ESA content had the largest values of softening point. In contrast, the softening point decreased as the ESA content decreased. The addition of ESA clearly shows the increase in viscosity. From the observations, it is evident that the addition of 5% of ESA has the potential to improve the performance of bitumen binder compared to other ESA percentages.
Penambangan batubara di Indonesia banyak menghasilkan limbah berupa abu batubara. Salah satunya ialah Batubara yang terdapat di Nagan Raya, memiliki kandungan silika (Si O2) lebih banyak daripada jenis lainnya. Berdasarkan literatur, penggunaan sulfur dalam campuran beraspal dapat meningkatkan stabilitas Marshall. Penelitian ini dilakukan untuk mendukung penelitian sebelumnya tentang filler dan untuk memperbaik mutu dalam campuran beraspal. Tujuan Penelitian ini adalah untuk mengetahui bagaimana pengaruh abu batubara sebagai filler terhadap karakteristik dan indeks kekuatan sisa pada campuran aspal beton AC-WC. Penelitian ini menggunakan metode marshall dan indeks kekuatan sisa (IKS). Aspal yang digunakan penelitian ini merupakan aspal pertamina Pen 60/70 dengan penambahan limbah abu batubara pada variasi 0%, 1%, 2%, 3%, 4% dan 5% sebagai filler. Pelaksanaan penelitian dimulai dengan pengambilan material lalu dilanjutkan dengan sifat-sifat fisis agregat sehingga dapat diketahui apakah memenuhi spesifikasi yang ditetapkan. Pada penelitian ini banyak benda uji/sampel KAO sebanyak 25 buah benda uji. Dengan memperoleh kadar aspal 6,1 yang bakal dipakai pada 6 variasi dimana pervariasi 5 sampel benda uji. Untuk variasi yang menggunakan abu batubara yaitu sebanyak 30 buah benda uji satu diantara benda uji akan dilakukan indek kekuatan sisa (IKS). Jadi jumlah total benda uji yang dibuat yaitu sebanyak 55 benda uji. Hasi penelitian menunjukkan peggunaan abu batubara sebagai filler pada parameter marshall semuanya memenuhi spesifikasi begitu juga dengan indeks kekuatan sisa (IKS) dimana > 80 sehingga hasil nilai tertinggi pada IKS yaitu pada variasi 3% dengan nilai 102.50.
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