Tests for geometrical properties of aggregates - Determination of percentage of crushed and broken surfaces in coarse aggregate particles

Tests for geometrical properties of aggregates - Determination of percentage of crushed and broken surfaces in coarse aggregate particles

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1   Scope

This European Standard specifies a method for the determination of the percentage of particles with crushed and broken surfaces in a sample of natural coarse aggregate. It applies to gravel or mixed aggregate containing gravel.
The test method specified in this part of this European Standard is applicable to particle size fractions di/Di where Di ≤ 63 mm and di ≥ 4 mm.

NOTE 1 For aggregate sizes with D > 63 mm and/or d < 4 mm the test may be carried out on particle size fractionsdi/Di where Di ≤ 63 mm and di ≥ 4 mm.

NOTE 2 For coarse aggregate between 4 mm and 20 mm the percentage of crushed or broken surfaces is linked to the flow coefficient and can therefore be used in association with the test method specified in EN 933‑6.