Methods and compositions for asphalt rejuvenation

Abstract

Roadway resurfacing often requires removal of the existing asphalt from the roadway for reuse. One method of resurfacing a roadway is hot-in-place recycling. Hot-in-place recycling employs substantial heat to remove the oxidized or aged asphalt. This heat further oxidizes the asphalt, creating a material that lacks many desirable properties (e.g., flowability) and flexibility. The disclosure provides compositions and methods that enhance oxidized asphalt, making it more viable for use in resurfacing roadways. Accordingly, compositions comprising recycled asphalt pavement and a rejuvenating agent are disclosed. The compositions combine a rejuvenator and fresh asphalt flux to make a modified asphalt rejuvenator. The modified rejuvenator is then mixed with recycled asphalt pavement to form a rejuvenated asphalt composition.

Dependencies are inferred from the claim text.