ANGLE OF INTERNAL FRICTION
| MATERIAL/NUMBER OF MEASUREMENT | PHIE(°) | PHILIN(°) | PHISF(°) |
|---|---|---|---|
| STEEL BALLS 1 | 21,1 | 20,9 | 19,2 |
| STEEL BALLS 2 | 21,1 | 20,8 | 18,8 |
| STEEL BALLS 3 | 20,0 | 19,8 | 18,2 |
| STEEL BALLS 4 | 21,0 | 20,7 | 18,7 |
| STEEL BALLS 5 | 19,0 | 18,7 | 18,0 |
| STEEL BALLS 6 | 18,3 | 17,9 | 18,3 |
| STEEL BALLS 7 | 18,5 | 18,1 | 18,5 |
| STEEL BALLS 8 | 19,9 | 19,7 | 18,5 |
| STEEL BALLS 9 | 18,2 | 18,2 | 17,6 |
| STEEL BALLS 10 | 18,8 | 18,5 | 17,8 |
| STEEL BALLS 11 | 18,6 | 18,6 | 17,7 |
| STEEL BALLS 12 | 19,8 | 19,7 | 18,3 |
| STEEL BALLS 13 | 18,0 | 17,5 | 18,0 |
| STEEL BALLS 14 | 18,9 | 18,3 | 18,2 |
| STEEL BALLS 15 | 20,4 | 20,1 | 17,9 |
| STEEL BALLS 16 | 19,8 | 19,8 | 18,5 |
| STEEL BALLS 17 | 17,3 | 17,1 | 17,3 |
| STEEL BALLS 18 | 19,0 | 18,6 | 18,0 |
| STEEL BALLS 19 | 17,7 | 17,3 | 17,6 |
| STEEL BALLS 20 | 19,8 | 19,5 | 18,3 |
| STEEL BALLS 21 | 20,8 | 20,3 | 18,0 |
| STEEL BALLS 22 | 20,0 | 20,0 | 18,8 |
| STEEL BALLS 23 | 20,7 | 20,3 | 18,5 |
| STEEL BALLS 24 | 20,9 | 20,4 | 18,6 |
| STEEL BALLS 25 | 20,4 | 20,3 | 18,9 |
| STEEL BALLS 26 | 21,0 | 20,3 | 18,4 |
| STEEL BALLS 27 | 20,1 | 20,0 | 18,2 |
| STEEL BALLS 28 | 19,2 | 18,8 | 19,1 |
| STEEL BALLS 29 | 20,6 | 20,3 | 18,5 |
| STEEL BALLS 30 | 20,9 | 20,9 | 17,8 |
| PHIE (°) | PHILIN (°) | PHISF (°) | |
|---|---|---|---|
| Minimum measured value | 17,3 | 17,1 | 17,3 |
| Maximum measured value | 21,1 | 20,9 | 19,2 |
| Standard deviation of measurement | 1,1 | 1,1 | 0,5 |
| Arithmetical mean diameter | 19,7 | 19,4 | 18,3 |
| Mean deviation | 1,0 | 1,0 | 0,4 |