Table 7 Test results of concrete strength (Mpa)
From: Influence of steel plates on the compressive strength and pore structure of concrete
| Â | 3Â days | 7Â days | 28Â days |
|---|---|---|---|
C20-R0 | 14.6 | 18.5 | 23.5 |
C20-R1 | 14.0 | 17.7 | 21.5 |
C20-R2 | 13.2 | 15.5 | 19.5 |
C20-R3 | 12.3 | 14.5 | 18.6 |
C20-R4 | 12.2 | 13.5 | 16.0 |
C20-R5 | 8.9 | 12.5 | 16.1 |
C20-R6 | 8.6 | 11.9 | 15.4 |
C20-R7 | 8.9 | 11.6 | 14.6 |
C20-R8 | 7.0 | 10.1 | 12.5 |
C50-R0 | 38.4 | 45.0 | 52.0 |
C50-R1 | 35.6 | 43.5 | 51.5 |
C50-R2 | 29.6 | 42.7 | 47.6 |
C50-R3 | 27.8 | 40.8 | 44.3 |
C50-R4 | 25.4 | 38.5 | 42.4 |
C50-R5 | 23.5 | 36.5 | 41.5 |
C50-R6 | 21.1 | 30.1 | 37.6 |
C50-R7 | 19.8 | 28.9 | 32.5 |
C50-R8 | 17.5 | 26.5 | 30.5 |