Research Article
Optimization of Concrete Containing Polyethylene Terephthalate Powder and Rice Husk Ash Using Response Surface Methodology
| Source | DF | Slump (mm) | Compressive strength (N/mm2) | Flexural strength (N/mm2) | SS | F value | value | SS | F value | value | SS | F value | value |
| Model | 5 | 190.778 | 16.88852 | 0.020914 | 76.02778 | 20.78734 | 0.015553 | 1.640978 | 12.15873 | 0.033172 | A | 1 | 88.166 | 39.02459 | 0.008275 | 6 | 8.202532 | 0.064365 | 0.212817 | 7.884262 | 0.06741 | B | 1 | 48.167 | 21.31967 | 0.019117 | 60.16667 | 82.25316 | 0.002832 | 1.3824 | 51.21405 | 0.005619 | AB | 1 | 25 | 11.06557 | 0.044836 | 6.25 | 8.544304 | 0.061344 | 0.0196 | 0.726125 | 0.456764 | A 2 | 1 | 9.388 | 4.155738 | 0.134232 | 3.555556 | 4.860759 | 0.114666 | 0.023472 | 0.86958 | 0.41986 | B 2 | 1 | 20.055 | 8.877049 | 0.058623 | 0.055556 | 0.075949 | 0.800756 | 0.002689 | 0.099616 | 0.772974 | Residual | 3 | 6.77778 | | | 2.194444 | | | 0.080978 | | |
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A-RHA; B-PET; SS: sum of squares; DF: degrees of freedom.
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