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The fitting results of the relationship between ρ and the n.
| Equation | Steel Fibers’ Ratio | a | b | c | R2 |
|---|---|---|---|---|---|
| 0% | 4.15 | 1050 | 8450 | 1.00 | |
| 0.5% | 6.01 | 1050 | 5850 | 1.00 | |
| 1.0% | 0.186 | 147 | 4210 | 0.99 | |
| 1.5% | 7.19 | 228 | 2340 | 1.00 | |
| 2.0% | 0.277 | 190 | 1380 | 1.00 | |
| 2.5% | 0.505 | 0.811 | 654 | 1.00 | |
| 3.0% | 0.215 | −0.14 | 434 | 1.00 |
