Recycled of Asphalt Road using Microwave Heating

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Ratthasak Prommas
Thaweesak Runngsakthaweekul
Nichapha Minabhun


This research studied the asphalt recycling process of microwave pre-heating which mainly targeted the
physical and mechanical properties of asphalt after microwave pre-heating process, effect of microwave power causes a change in temperature of asphalt and suitable time of microwave pre-heating for turning hard asphalt into soft asphalt. The experiment was studied at the power of magnetron of 400, 500, 600, 700 and 800 Watts and heating time of 5, 10, 20 and 25 minutes. The research results regarding the physical and mechanical properties of asphalt heated by microwave including watt and suitable time for soft asphalt in recycling found that at power 600 Watts, 10 minutes time, the asphalt had a uniform temperature especially at 146.00 ± 0.70 C and which was most appropriate for recycling. The economic analysis showed that electric energy at 0.099 kWh was deemed as saving energy when compared with the other time and Wattage which did not change asphalt’s physical and mechanical properties between 120 C - 160 C. Accordingly, the research result can be applied for the design and creation of an effective drying device for asphalt road surface, as well as reducing energy consumption.


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