Tests for geometrical properties of aggregates - Determination of particle size distribution. Test sieves, nominal size of apertures shop-only to the point where it

to the point where it is discharged into a treatment works or receiving water

whether learners work individually or in groups

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BS EN 14989-1:2007 contains:

Sections six

Tests for geometrical properties of aggregates - Determination of particle size distribution. Test sieves, nominal size of apertures shop-only to the point where itThis European Standard, a part of the BS EN 933 series, specifies nominal aperture sizes and shapes for woven wire cloth and perforated plate in test sieves used for test methods for aggregates. It applies to aggregates of natural or artificial origin including lightweight aggregates.