| Cement | Mean values of coefficients | Adj R2± |
| Equation (1) | ||
| XYL-00 | k1 = 0.4672; n1 = 0.05133 | 0.9989 |
| XYL-07 | k1 = 0.2257; n1 = 0.10025 | 0.9691 |
| XYL-14 | k1 = 0.2773; n1 = 0.08630 | 0.9953 |
| XYL-27 | k1 = 0.2225; n1 = 0.10056 | 0.9809 |
| Equation (2) | ||
| XYL-00 | k2 = 0.4672; n2 = 0.05133; b = 0.62 × 10−4 | 0.9988 |
| XYL-07 | k2 = 0.2253; n2 = 0.10034; b = 7.87 × 10−4 | 0.9678 |
| XYL-14 | k2 = 0.2770; n2 = 0.08634; b = 4.18 × 10−4 | 0.9951 |
| XYL-27 | k2 = 0.2220; n2 = 0.10067; b = 8.87 × 10−4 | 0.9801 |
| Equation (3) | ||
| XYL-00 | A = 3.64 × 10−16; B = 0.8184; C = 1.22 × 10−4; n3 = 1 | 0.9988 |
| XYL-07 | A = 2.54 × 10−11; B = 0.6660; C = 2.22 × 10−4; n3 = 1 | 0.9704 |
| XYL-14 | A = 3.83 × 10−11; B = 0.7061; C = 1.95 × 10−4; n3 = 1 | 0.9970 |
| XYL-27 | A = 2.53 × 10−10; B = 0.6579; C = 2.21 × 10−4; n3 = 1 | 0.9844 |
| Equation (4) | ||
| XYL-00 | k3 = 2.663; τ = 3.75 × 1011; d = 0.06379 | 0.9988 |
| XYL-07 | k3 = 4.131; τ = 2.53 × 1011; d = 0.11260 | 0.9676 |
| XYL-14 | k3 = 3.635; τ = 2.72 × 1011; d = 0.09905 | 0.9950 |
| XYL-27 | k3 = 4.090; τ = 2.44 × 1011; d = 0.11290 | 0.9798 |