Sample No.31. 40% London brick + 60% Gravel W/C Ratio 0.50 Observations | ||||||
Cycles | Start | 10 | 20 | 30 | 40 | 50 |
Length (*0.0l mm) | 248.25 | 258.5 | 271 | 285 | 266 | 268.5 |
Weight (g): | 11870.5 | 11,878 | 11,877 | 11,875 | 11877.5 | 1877.5 |
R frequency (Hz): | 4131.5 | 3725.5 | 3721 | 3693 | 3641.5 | 3607.5 |
Dyn. Mod. (N/mm’): | 40522.5 | 32,963 | 32,900 | 32,425 | 31502.8 | 30920.4 |
Reduction in Dyn. Modulus-23.7%, Increase in length-0.04% | ||||||
Sample No.12. 30% London brick + 70% Gravel W/C Ratio 0.385 Observations | ||||||
Cycles | Start | 10 | 20 | 30 | 40 | 50 |
Length (*0.0l mm): | 255.2 | 261.7 | 273.5 | 286.5 | 271 | 273 |
Weight (g): | 11919.3 | 11,926 | 11,926 | 11,904 | 11,874 | 11925.5 |
R frequency (Hz): | 4104 | 3594.5 | 3627 | 3595 | 3585 | 3573.5 |
Dyn. Mod. (N/mm’) | 40149.5 | 30807.7 | 31,382 | 30,847 | 30,656 | 30462.5 |
Reduction in Dyn. mod. = 24.13% Increase in length = 0.035% |