What is BS EN 12697‑55- Organoleptic assessment of bituminous mixtures about?  
BS EN 12697 is a European Standard that discusses bituminous mixtures and related test methods. The main objective of the BS EN 12697 series is to ensure that the quality and performance of bituminous mixtures contributes to the structural integrity of your engineering works.
BS EN 12697‑55 is the 55th part of the series that defines three procedures to evaluate the compatibility of the constituent materials of a bituminous mixture with bitumen emulsion.
BS EN 12697‑55 applies to mixtures prepared in the laboratory or taken from the plant.
Who is BS EN 12697‑55- Organoleptic assessment of bituminous mixtures for? 
BS EN 12697‑55 on organoleptic assessment of bituminous mixtures is useful for: 
- Manufacturers and suppliers of bituminous mixtures
- Suppliers of construction materials
- Construction industry
- Civil engineers
- Contractors
- Road construction and maintenance authorities
- Testing laboratories
Why should you use BS EN 12697‑55- Organoleptic assessment of bituminous mixtures?  
Bituminous mixtures, also known as asphalt mixtures, are widely used as construction materials, that impart durability and structural strength to the end-application.
The organoleptic approaches can be combined to assess the compatibility of constituent materials following hand mixing for a specific emulsion and water content:
Method A: All of the ingredients are combined by hand. At various water levels, residual binder contents, and times after fabrication, the degree of coating of the mixture is assessed.
Method B: All of the ingredients are combined by hand. The consistency of the mixture is assessed at various water content levels, residual binder levels, and post-fabrication timeframes.
Method C: All of the ingredients are combined by hand. The hydric aspect of the combination is examined at various water concentrations, residual binder levels, and post-fabrication timeframes.
This can help you assess the coating evolution, consistency of the mixture, and hydric aspects like foam, drip, and water drainage during the mixing process.
