EN 933-6 / NF P18-564Used to measure the efflux index of fine aggregates (shape and angularity), having dimensions up to 4 mm. The efflux index of an aggregate is the required time in seconds of a known volume of aggregates to flow from a known opening.The unit is basically formed by a container, two polycarbonate funnels having 85 mm height, 60° c..

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