How is asphalt emulsion used in RAP recycling and cold reclamation processes?

In RAP recycling and cold in-place or full-depth reclamation, asphalt emulsion is used as a water-based binder that coats reclaimed aggregate at ambient temperatures. The emulsion disperses through mixing, breaks on aggregate surfaces, then cures as water evaporates, leaving asphalt residue that restores cohesion. Design focuses on residual asphalt content, breaking control, moisture management, and mixing energy. Emulsion selection (setting speed and charge) must match RAP fines and base moisture to avoid tender mixes or slow strength gain.