Research Article
Response Surfaces for Fresh and Hardened Properties of Concrete with E-Waste (HIPS)
Table 7
Analysis of variance for slump (mm) response surface quadratic model.
| | Source | Sum of squares | Degrees of freedom | Mean square | value | value |
| | Model | 354.56 | 5 | 70.91 | 70.65 | <0.0001 | | -HIPS (Vol %) | 313.06 | 1 | 313.06 | 311.91 | <0.0001 | | - ratio | 2.68 | 1 | 2.68 | 2.67 | 0.1463 | | 1.00 | 1 | 1.00 | 1.00 | 0.3514 | | 37.78 | 1 | 37.78 | 37.64 | 0.0005 | | 4.64 | 1 | 4.64 | 4.62 | 0.0686 | | Residual | 7.03 | 7 | 1.00 | | | | Lack of fit | 7.03 | 3 | 2.34 | | | | Pure error | 0.00 | 4 | 0.00 | | |
| | Total | 361.59 | 12 | | | |
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