Research Article
Mechanical Properties of Polypropylene-Fiber-Reinforced High-Performance Concrete Based on the Response Surface Method
Table 8
Definition of factors and responses in multiobjective optimization.
| | Name | Goal | Lower limit | Upper limit | Importance |
| | The content of PPF (%) | Is in range | 1 | 2 | | | The content of FA (%) | Is in range | 45 | 75 | | | Water-binder ratio | Is in range | 0.27 | 0.33 | | | 7 d compressive strength (MPa) | Maximize | 21.1 | 59.6 | 1 | | 7 d flexural strength (MPa) | Maximize | 3.4 | 6.4 | 4 | | 7 d flexural-compressive ratio (%) | Maximize | 6.63 | 19.00 | 5 | | 28 d compressive strength (MPa) | Maximize | 31.65 | 65.65 | 1 | | 28 d flexural strength (MPa) | Maximize | 4.7 | 7.95 | 4 | | 28 d flexural-compressive ratio (%) | Maximize | 8.67 | 15.24 | 5 | | 28 d splitting tensile strength (MPa) | Maximize | 5.31 | 7.60 | 3 | | 28 d initial cracking strength (MPa) | Maximize | 1.94 | 7.30 | 5 | | 28 d bending strength (MPa) | Maximize | 3.01 | 5.60 | 5 |
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