What critical production and quality aspects of bitumen emulsion are typically omitted in general reference sources?

General sources often skip the practical controls that determine whether an emulsion is usable on site. Common omissions include water chemistry limits (hardness, chlorides, alkalinity), pH control strategy for cationic systems, particle size distribution targets and how mill settings affect them, storage stability mechanisms and tank design, compatibility with aggregates (breaking and adhesion), and cleaning/changeover procedures that prevent cross contamination between grades. They also rarely cover field QA correlation between lab tests and performance.