In which applications are anionic asphalt emulsions technically preferable to cationic types?

Anionic emulsions can be preferable when working with alkaline or calcareous aggregates and where the mix design and local specifications are built around anionic chemistry. They are often used in certain slurry seal, micro surfacing, or specialized mixes depending on regional practice and aggregate compatibility. Anionic systems may be more sensitive on siliceous aggregates and damp substrates compared with cationic, so their best use is where aggregate chemistry and environmental conditions support stable adhesion and controlled break. Selection should be based on aggregate tests, charge compatibility, and proven local performance rather than generic preference.