Table 9 ANOVA analysis and model validation for recycled aggregate concrete with fibers.
Responses | Compressive strength | Tensile strength | Elastic modulus |
|---|---|---|---|
Psi | Psi | Psi | |
Standard deviation | 162.84 | 75.88 | 61,425.23 |
Mean R2 | 0.9478 | 0.9302 | 0.9452 |
Predicted R2 | 0.9354 | 0.9135 | 0.9321 |
Adjusted R2 | 0.9174 | 0.8889 | 0.9108 |
Adequate precision | 22.5719 | 20.7510 | 27.8076 |
F-value (model) | 76.25 | 55.95 | 72.41 |
p-value (model) | < 0.0001 | < 0.0001 | < 0.0001 |
Model | Significant | Significant | Significant |
Lack of fit (F and p values) | Not significant (F value = 10.05 p value = 0.0004) | Not significant (F value = 5.75 p value = 0.0061) | Not significant (F value = 7197.11 p value ≤ 0.0001) |
Final model type | Quadratic | 2FI | Quadratic |
