What quality control tests should be requested from bitumen emulsion suppliers before long-term procurement?

Buyers should request particle size distribution, storage stability, viscosity, residue by evaporation, breaking behavior, pH, and adhesion tests. Compliance with standards such as EN 13808 or ASTM specifications is essential. Routine batch certificates and periodic third-party testing increase reliability. Field performance data and consistency across deliveries are often more important than nominal lab results alone.