Infrared asphalt recycling is in-place reheating of asphalt by means of energy producing equipment designed to soften the bitumen without burning it which allows for reworking the pavement.
A brief explanation of heat energy transfer helps to provide an understanding of how asphalt softening works and how long it effectively takes to “melt the pavement.” Heat energy transfers by three modes:
- Convection – air circulation and diffusion.
- Radiation – travel of wavelengths through air.
- Conduction- transfer through a solid material.