Determine the following:

a. (6 pts) The compressive strength of each cube.

b. (6 pts) The average compressive strength for each mix.

c. (6 pts) Plot the average compressive strength versus w/c ratios for all mixes.

d. (6 pts) Comment on the effect of increasing the w/c ratio on the compressive strength of the cubes.

  

Mix No. W/c ratio Cube No. 2 3 0.55 0.60 0.65 1 2 3 2 3 Maximum Load (lbs) 15875 16243 16689 15670 15147 14952 14370 Compressive strength (psi) Average compressive strength (psi)