BS EN 12620:2013

BS EN 12620:2013 Aggregates for concrete

BS EN 12620:2013 specifies the properties of aggregates and filler aggregates obtained by processing natural, manufactured or recycled materials and mixtures of these aggregates for use in concrete in conformity with BS EN 206-1 and concrete used in roads and other pavements and for use in precast concrete products.

It covers aggregates having an oven dried particle density greater than 2,0 Mg/m3 (2000 Kg/m3). It also covers recycled aggregate with particle densities greater than 1,50 Mg/m3 (1500 kg/m3) with appropriate caveats and recycled fine aggregate with appropriate caveats.

Requirements for the evaluation of conformity of the products to this BS EN 12620:2013 are given in BS EN 16236.

It incorporates a general requirement that aggregates shall not release any dangerous substances in excess of the maximum permitted levels specified in a relevant European Standard for the material or permitted in the national regulations of the member state of destination.

Contents for BS EN 12620:2013 includes:

Scope
Normative references
Terms and definitions

Geometrical requirements
- General
- Aggregate sizes
- Grading
- General
- Coarse aggregates
- Fine aggregates
- All-in aggregates
- Special use aggregates and declared grading categories
- Grading of added filler
- Natural graded 0/8 mm aggregates
- Fines content
- Fines quality
- Particle shape of coarse and all-in aggregates
- Flakiness index and shape index
- Percentage of crushed or broken particles
- Angularity of fine aggregates
- Shell content of coarse and all-in aggregates

Physical requirements
- General
- Resistance to fragmentation
- Resistance to wear
- Particle density and water absorption
- Particle density
- Water absorption
- Bulk density
- Resistance to polishing for application in surface courses
- Resistance to surface abrasion
- Resistance to abrasion from studded tyres for application in surface courses

Chemical requirements
- General
- Petrographic description
- Classification of the constituents of coarse recycled aggregates
- Sulfur containing compounds
- Acid-soluble sulfate
- Total sulfur
- Water soluble sulfate content of recycled aggregates
- Chlorides
- Carbonate content for concrete pavement surface courses of fine, and all-in aggregates
- Other constituents
- Constituents which alter the rate of setting and hardening of concrete
- Constituents which affect the volume stability of air-cooled blast furnace slag

Durability
- General
- Magnesium sulfate soundness of coarse aggregates
- Freeze – thaw resistance
- Water absorption as a screening test for freeze-thaw resistance
- Resistance to freezing and thawing
- Resistance to freezing and thawing in the presence of salt (extreme conditions)
- Volume stability - drying shrinkage
- Alkali-silica reactivity

Evaluation of conformity

Designation
- Designation and description
- Additional information for the description of an aggregate

Marking and labelling

This British Standard is the UK implementation of EN 12620:2013. It supersedes BS EN 12620:2002 which is withdrawn. 

The new standards for aggregates:

BS EN 12620:2013 Aggregates for concrete