Answer to Question #305315 in Civil and Environmental Engineering for James

Question

Using the following data for an unreinforced PCC Pavement slab, find the following:

 Design strength f’c = 4,000 psi

 Slab thickness = 12”

 Standard deviation f’c of obtained from 20 samples = 200 psi

 Ignore any exposure requirement

 Use air entrained concrete

 Fineness modulus of fine aggregate = 2.60

 Maximum aggregate size = 2” and nominal maximum aggregate size = 1.5”

 Bulk oven-dry specific gravity of coarse aggregate = 2.6

 Oven-dry rodded density of coarse aggregate = 125 pcf

a. required compressive strength

b. water-cement ratio

c. Coarse aggregate amount

d. If the w/c ratio is 10% reduced, will the quantity of coarse aggregate increase, decrease or remain

the same? Explain your answer.

Answer 1

Answer is given below