Table 10.
Compressive strength of the contaminated cement—the polynomial model.
| Contaminant | Parameters of the Polynomial Model of Compression Strength Change (α1 × x3 + α2 × x2 + α3 × x + ε) | |||||
|---|---|---|---|---|---|---|
| Polynomial model degree | α1 | α2 | α3 | ε | R2 | |
| Human blood | 1st (linear) | - | - | −102.76 | 78.33 | 0.59 |
| 2nd (quadratic) | - | 1716 | −285.58 | 80.87 | 0.75 | |
| 3rd (cubic) | −56,651 | 10,954 | −659.22 | 83.20 | 0.88 | |
| Saline solution | 1st (linear) | - | - | −223.85 | 87.35 | 0.84 |
| 2nd (quadratic) | - | 1540 | −388.87 | 89.54 | 0.87 | |
| 3rd (cubic) | 61,137 | −8523 | 21.18 | 87.12 | 0.92 | |