How are asphalt emulsion types classified by charge, setting speed, and modification level?

Types are classified by ionic charge, usually cationic, anionic, or nonionic, which affects aggregate compatibility and breaking behavior. They are also grouped by setting speed, commonly rapid, medium, or slow, which determines whether they are suited to spray applications, mixing, or extended working time systems. Modification level refers to polymer or rubber modification that changes elasticity, residue properties, and performance in sealcoats or crack fillers. Industrial procurement should specify all three dimensions plus key measured properties like residue content, viscosity, and stability to avoid ambiguous product substitution.