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%