Improving Microwave Heating Characteristic of Asphalt Binder by Using Fly Ash

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Atakan M., Yıldız K.

4. International Sustainable Buıldings Symposium, Texas, United States Of America, 19 - 21 July 2019, pp.285-293

  • Publication Type: Conference Paper / Full Text
  • City: Texas
  • Country: United States Of America
  • Page Numbers: pp.285-293
  • Gazi University Affiliated: Yes


Previous studies have indicated that asphalt can heal itself, if it is allowed to rest enough. Current research on self-healing is focused on induction and microwave heating methods which provides with adding metallic fibers to asphalt mixture. However, any study about usage of fly ash to improve microwave heating of asphalt binder is not encountered. Because utilization rate of fly ash that is an environmen- tal pollutant is 25% in the world, is required to find new field to use it. This chapter studies usability of fly ash as a microwave absorber in order to accelerate microwave heating of asphalt binder. In order to achieve this, specimens that contain fly ash at different ratio were prepared and microwave heating rate of these specimens were tested. These tests revealed that fly ash can accelerate microwave heating of bitu- men, so it has a potential to improve self-healing of asphalt. The study also showed that below 20% of fly ash ratio by bitumen weight may not be enough to provide self-healing