Table 7 Compressive strength loss rate of five groups by dry–wet test
Groups | Original strength (MPa) | Strength of dry–wet test (MPa) | Loss rate (%) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
20 cycles | COV (%) | 30 cycles | COV (%) | 40 cycles | COV (%) | 20 cycles | 30 cycles | 40 cycles | ||
A | 15.26 | 15.06 | 1.40 | 14.73 | 1.54 | 14.41 | 1.98 | 1.3 | 3.5 | 5.6 |
B | 13.47 | 12.72 | 1.91 | 12.15 | 2.46 | 11.52 | 2.18 | 5.6 | 9.8 | 14.5 |
C | 11.53 | 10.63 | 2.06 | 10.32 | 3.47 | 9.93 | 2.86 | 7.8 | 10.5 | 13.9 |
D | 8.13 | 7.15 | 3.39 | 6.67 | 4.51 | 6.38 | 5.44 | 12 | 17.9 | 21.5 |
E | 5.97 | 4.70 | 5.05 | 4.36 | 6.08 | 3.59 | 7.73 | 21.3 | 27 | 39.8 |