1. Dielectric characterisation of asphalt mortars for microwave heating applications.
- Author
-
Gulisano, Federico, Gallego, Juan, Trigos, Laura, and Apaza Apaza, Freddy Richard
- Subjects
- *
MORTAR , *ASPHALT pavements , *ASPHALT , *DIELECTRIC properties , *ARC furnaces , *DIELECTRICS , *ELECTRIC arc - Abstract
• Energy efficiency in MW heating is improved by increasing the loss factor ε″. • The incorporation of EAF slag in asphalt mortars increased its loss factor ε″. • Within the 0.1–6 GHz range, the frequency 5.8 GHz yielded the highest value of ε″. • Microwave radiation at a frequency of 5.8 GHz can penetrate the pavement 7 cm. Microwave (MW) heating could contribute to the sustainability of the construction and maintenance of asphalt pavements. The relationship between frequency and the dielectric properties (i.e. loss factor and penetration depth) is crucial for maximising the MW heating efficiency. The paper aims to study the dielectric properties of conventional and electric arc furnace (EAF) slag asphalt mortars. Results showed that the addition of EAF slag enhanced the dielectric response of asphalt mortars. Moreover, a frequency of 5.8 GHz seems to be the best choice for deicing application and assisted-healing of surface layers up to 7 cm. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF