w/c Ratio Compressive Strength Test Flexure Test Split Tension Test Tensile Strength (ksi) Modulus Failure Compressive Load (kips) Strength (ksi) Load (kips) Failure of Rupture (ksi) Failure Load (kips) 0.50 44.4 3.6 51.6 0.55 30.8 2.7 47.0 0.60 24.0 2.2 41.6
Three batches of concrete were prepared using the same materials and ingre-
dients, except that they have water–cement ratios of 0.50, 0.55, and 0.60,
respectively. The following tests were performed on specimens made of the
three batches:
■ Compressive strength test on 4′′ * 8′′ cylinders
■ Center-point flexure test on 4′′ * 4′′ * 12′′ beams
■ Split tension test on 6′′ * 12′′ cylinders
Three replicates were tested for each test. Table shows the average failure loads for the three replicates of each case.It is required to do the following:
a. Complete Table
b. Using an Excel sheet, plot the relationships between water–cement ratio and compressive strength, modulus of rupture, and tensile strength on the same graph. Label all axes and curves.
c. Comment on the effect of water–cement ratio on the compressive strength, modulus of rupture, and tensile strength.
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