What is BS EN 12697‑2-Particle size distribution 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 performance of bituminous mixtures contributes to the structural integrity of your engineering works.
BS EN 12697‑2 is the second part of the multi-series specifies a procedure for the determination of the particle size distribution of the aggregates of bituminous mixtures by sieving. The test is applicable to aggregates recovered after binder extraction in accordance with EN 12697-1 or EN 12697-39.
Note: Fibres, solid (non-soluble during extraction) additives, and (some) binder modifiers influence the test result.
Who is BS EN 12697‑2- Particle size distribution of bituminous mixtures for? 
BS EN 12697‑2 on the determination of particle size distribution is useful for: 
- Manufacturers and suppliers of bituminous mixtures
- Suppliers of construction materials
- Construction companies
- Civil engineers
- Contractors
- Road maintenance authorities
- Testing laboratories
Why should you use BS EN 12697‑2- Particle size distribution of bituminous mixtures?  
For the purpose of BS EN 12697-2, particle size distribution is the portion of aggregate on specified sieves expressed as cumulative percentages by mass passing those sieves
The test recommended by BS EN 12697-2 consists of the determination of the particle size distribution of the aggregates in the bituminous mixture by sieving and weighing. A granulometric analysis of the aggregate is performed after binder extraction.
The composition of a bituminous mixture in terms of binder content and aggregates grading is a significant quality parameter. BS EN 12697-2 for bituminous mixtures contains some grading specifications.
As a user of BS EN 12697‑2, controlling the mixture grading is an important instrument for product quality management.
What’s changed since the last update?
BS EN 12697‑2:2015+A1:2019 supersedes BS EN 12697‑2:2015, which is withdrawn. BS EN 12697‑2:2015+A1:2019 includes some significant changes with respect to BS EN 12697‑2:2015. These include: 
- The series title no longer makes the method exclusively for hot mix asphalt
- The list of significant changes is updated and the list of standards of the EN 12697 series is replaced with a general reference to the CEN website
