Sieving on sieves

Screening on a grid

Granular class d/D (mm)

Mg (g)

Grids spacing (mm)

Passing Mei (g)

31.5/40

20

25/31.5

16

20/25

12.5

16/20

10

12.5/16

8

10/12.5

58

6.3

19

8/10

230

5

46

6.3/8

726

4

167

5/6.3

541

3.15

50

4/5

800

2.5

170

M = ΣMgi

2355

M = ΣMei

452

M0

2361

A (%)

19.19