I. Sieve Analysis
An analysis of granular sample is carried out in a series of screens to determine the composition of sample in terms of particle diameter. Sample problems on size reduction usually report screen opening in terms of mesh number -Tyler Screens.
1. Tyler Screen
| US Sieve Size | Tyler Equipment (Mesh size) | Opening | |
|---|---|---|---|
| mm | in | ||
| – | 2 1/2 mesh | 8.00 | 0.312 |
| – | 3 mesh | 6.73 | 0.265 |
| No. 3 1/2 | 3 1/2 mesh | 5.66 | 0.233 |
| No. 4 | 4 mesh | 4.76 | 0.187 |
| No. 5 | 5 mesh | 4.00 | 0.157 |
| No. 6 | 6 mesh | 3.36 | 0.132 |
| No. 7 | 7 mesh | 2.83 | 0.111 |
| No. 8 | 8 mesh | 2.38 | 0.0937 |
| No. 10 | 9 mesh | 2.00 | 0.0787 |
| No. 12 | 10 mesh | 1.68 | 0.0661 |
| No. 14 | 12 mesh | 1.41 | 0.0555 |
| No. 16 | 14 mesh | 1.19 | 0.0469 |
| No. 18 | 16 mesh | 1.00 | 0.0394 |
| No. 20 | 20 mesh | 0.841 | 0.0331 |
| No. 25 | 24 mesh | 0.707 | 0.0278 |
| No. 30 | 28 mesh | 0.595 | 0.0234 |
| No. 35 | 32 mesh | 0.500 | 0.0197 |
| No. 40 | 35 mesh | 0.420 | 0.0165 |
| No. 45 | 42 mesh | 0.354 | 0.0139 |
| No. 50 | 48 mesh | 0.297 | 0.0117 |
| No. 60 | 60 mesh | 0.250 | 0.0098 |
| No. 70 | 65 mesh | 0.210 | 0.0083 |
| No. 80 | 80 mesh | 0.177 | 0.0070 |
| No. 120 | 115 mesh | 0.125 | 0.0049 |
| No. 140 | 150 mesh | 0.105 | 0.0041 |
| No. 170 | 170 mesh | 0.088 | 0.0035 |
| No. 200 | 200 mesh | 0.074 | 0.0029 |
| No. 230 | 250 mesh | 0.063 | 0.0025 |
| No. 270 | 270 mesh | 0.053 | 0.0021 |
| No. 325 | 325 mesh | 0.044 | 0.0017 |
| No. 400 | 400 mesh | 0.037 | 0.0015 |
2. Data Reporting
A. Fractional – analysis of sample in terms of mass fractions retained per screen
B. Cumulative – portions are summed up.
