Table 7.
Analysis of range difference of compressive strength at each age.
| Range Analysis | K | Factor A | Factor B | Factor C |
|---|---|---|---|---|
| 3 days’ compressive strength | K1 | 1.033 | 1.257 | 1.293 |
| K2 | 0.917 | 1.030 | 0.887 | |
| K3 | 0.537 | 0.200 | 0.307 | |
| R | 0.496 | 1.057 | 0.986 | |
| Degree of influence | B > C > A | |||
| 7 days’ compressive strength | K1 | 5.230 | 5.507 | 2.327 |
| K2 | 3.840 | 3.887 | 3.110 | |
| K3 | 1.833 | 1.560 | 5.517 | |
| R | 3.347 | 3.947 | 3.190 | |
| Degree of influence | B > A > C | |||
| 28 days’ compressive strength | K1 | 6.423 | 6.760 | 2.547 |
| K2 | 4.633 | 4.650 | 4.333 | |
| K3 | 2.440 | 2.087 | 6.617 | |
| R | 3.983 | 4.673 | 4.070 | |
| Degree of influence | B > C > A | |||