Under what conditions do anionic bitumen emulsions produce smoother surface finishes compared to cationic types?

Anionic emulsions can yield smoother finishes when aggregate chemistry and water conditions favor slower, more uniform breaking. On certain siliceous aggregates, they may spread evenly and avoid rapid flocculation seen with cationic grades. Application rate and surface moisture are critical. Proper matching of emulsion charge to aggregate surface chemistry determines whether the smoother finish advantage is realized.