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Airports are the single largest source of waste asphalt primarily contributed by Flexible Pavements of the runways. Airplanes are heavy machinery and leave a small footprint. These runways provide a safe surface for the operation of aircraft. The surface should be smooth, durable and free of any Foreign Origin Debris (FOD). The thickness of flexible pavement varies between 15 cm to 50 cm of Hot Mix Asphalt (HMA). Pavements may require rehabilitation for a variety of reasons. Large amounts of waste asphalt is generated during preventative maintenance and resurfacing existing runways. The proposed process of producing fuel oil from waste asphalt is environmentally friendly and is a complete solution. It follows the three main principles or 3R’s of recycling namely recycle waste, recover fuel oil and reuse cleaned aggregates for the pavement. The process is carried out at ambient temperature and would generate revenue for the airports. Further, the process reduces carbon footprint considerably. The oil recovered is comparable to Low Sulfur No. 4 Fuel oil that can be used on ships as per the guidelines by International Maritime Organization (IMO). The processing plants can be located ‘in-house’ at the airports and would save the cost of long distance transportation of the waste generated.
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