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DIN EN 933-4:2015
Tests for geometrical properties of aggregates - Part 4: Determination of particle shape - Shape index; German version EN 933-4:2008
This document specifies a method for the determination of the shape index of coarse aggregates. It applies to aggregates of natural or artificial origin, including lightweight aggregates between 4 mm and 63 mm nominal size.
Deutsches Institut für Normung [din]