Calculate the resulting maximum pressure developed in a colu

Calculate the resulting maximum pressure developed in a column form 20 in. x 20 in. x 20 ft if the form is filled in 30 min. Temperature is 68 deg F.

Solution

Ans: (A)

unit weight of concrete = 150.2 lbs/ft3

so, pressure developed = unit weight * Volume/ Area = unit weight * height = 150.2*20 = 3004 psf == 3000 psf