Grid Sieve Sets (Flakiness Index Sieve EN)

During testing, pre-sized aggregate is passed through a sieve with an appropriate slot opening. Particles that pass are classified as “flaky,” while those retained are considered normal (spherical or cubical). This procedure is repeated for each sieve range, and flakiness index (FI) is calculated from the resulting data. Manufactured in accordance with EN 933-3, each sieve features a rigid, deformation-resistant frame and precisely machined stainless-steel rods. Parallel slot spacing ensures consistent screening within each fraction and provides repeatable classification results. Frames are engineered for laboratory use and protected against corrosion with an electrostatic coating; smooth edges minimize particle interlocking and surface wear. Clear, permanent labels help users quickly identify correct sieve ranges.