Research Article
Response Surfaces for Fresh and Hardened Properties of Concrete with E-Waste (HIPS)
Table 12
Analysis of variance for 7-day split tensile strength (MPa) response surface quadratic model.
| Source | Sum of squares | Degrees of freedom | Mean square | value | value |
| Model | 0.96 | 5 | 0.19 | 474.17 | <0.0001 | -HIPS (Vol %) | 0.73 | 1 | 0.73 | 1816.44 | <0.0001 | - ratio | 0.20 | 1 | 0.20 | 498.39 | <0.0001 | | 0.000225 | 1 | 0.0002250 | 0.56 | 0.4801 | | 0.011 | 1 | 0.011 | 28.08 | 0.0011 | | 0.003219 | 1 | 0.003219 | 7.95 | 0.0258 | Residual | 0.002832 | 7 | 0.0004046 | | | Lack of fit | 0.002832 | 3 | 0.0009442 | | | Pure error | 0.000 | 4 | 0.000 | | |
| Total | 0.96 | 12 | | | |
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