Lately, plastic waste has become a problem in our society, due to the negative impact that it has on our environment. To mitigate this, the reuse of plastic bottle wastes and other local materials should be encouraged. In this paper, the authors present an innovative application for polyethylene terephthalate (PET) that is obtained from plastic bottle wastes, as an additive to Asphalt Concrete-Wearing Course (AC-WC), a hot mix asphalt (HMA) type. The AC-WC sample that contained the PET was measured using the wet method to determine the Marshall parameters of the samples. The type of bitumen used as the specimen is asphalt, which has a penetration value of 60/70. The optimum asphalt content (OAC) obtained from the preliminary study was found to be 5.7% of the total asphalt weight. The results show that AC-WC mixture strength improves when plastic bottle waste is used, which can be correlated with an increase in stability. This finding shows that plastic bottle waste and other local materials have an alternate use as a road pavement material.
This paper studies the effect of compaction temperatures on Marshall properties on a Hot Rolled Sheet-Base (HRS-Base) mixture with the addition of plastic waste. Polyethylene terephthalate (PET) type plastic waste from plastic bottle waste is used in this study as an additional material of HRS-Base mixture. The ‘wet method’ is used to mix the PET into HRS-Base mixture, in which the PET is pre-mixed with asphalt material at the temperatures between 160 °C to 170 °C to create modified asphalt before it is mixed with HRS-Base aggregates. The materials used in this study consist of PET from plastic bottle waste, 60/70 penetration asphalt, Portland cement, and aggregates. The aggregate composition used must meet HRS-Base specifications based on the Indonesian National Standard (SNI). The results showed that increasing the compaction temperature of the HRS-Base mixture had an impact on increasing density, Voids Filled with Asphalt (VFA), Marshall stability, and Marshall Quotient (MQ), while the values of Voids in Mix (VIM), Voids in Mineral Aggregates (VMA), and Flow decreased. In addition, HRS-Base without the addition of PET plastic (conventional HRS-Base) and HRS-Base with the addition of PET plastic (modified HRS-Base) were compared. Conventional HRS-Base has a density value, Voids Filled with Asphalt (VFA), and Flow higher than those of modified HRS-Base. While, the value of Voids in Mix (VIM), Voids in Mineral Aggregates (VMA), and Marshall stability of conventional HRS-Base are lower than those of modified HRS-Base.
ABSTRAKKebijakan sistem transportasi berkelanjutan ini memiliki tiga syarat utama, yaitu peningkatan kesejahteraan rakyat, meminimalisasi dampak lingkungan hidup dan adanya keberlanjutan penggunaan potensi sumber daya. Sumber polusi udara di daerah perkotaan termasuk di Kota Surabaya biasanya datang dari sektor transportasi karena sebagian besar kendaraan bermotor menggunakan bahan bakar minyak (BBM). Bahan bakar gas (BBG) merupakan salah satu bahan bakar alternatif yang dapat digunakan dalam rangka perbaikan kualitas udara di Kota Surabaya. Dalam konteks ini kiranya penting diketahui bagaimana implementasi pemakaian BBG di Kota Surabaya. Pendekatan dalam kajian ini dilakukan dengan melakukan survey terhadap pihak pengelola kendaraan umum dan pihak pemakai kendaraan dinas di lingkungan Pemkot Surabaya yang pernah menggunakan BBG. Selanjutnya, dilakukan evaluasi terhadap pengalaman pemakaian BBG oleh taksi zebra dan kendaraan dinas dilingkungan Pemkot Surabaya. Hasil yang didapatkan memperlihatkan bahwa keunggulan dari pemakaian BBG untuk angkutan umum (taksi) dan kendaraan dinas yang beroperasi di wilayah Kota Surabaya, diantaranya : harga BBG lebih murah dibandingkan dengan BBM; volume pemakaian BBG lebih irit dibandingkan dengan BBM; dan lebih ramah lingkungan. Sedangkan kelemahannya diantaranya : jumlah SPBG masih sangat sedikit; stock BBG yang tersedia di SPBG terbatas; pasokan BBG pada stasiun yang ada belum lancar; dan lokasi SPBG masih sulit dijangkau. Ditinjau dari sistem operasionalnya, implementasi pemakaian BBG pada kendaraan umum berbeda dengan kendaraan dinas.
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