## Compressive Strength Of Concrete Test - Engineering ...

At least three specimens, preferably from different batches for testing at each selected age. Calculation For Compressive Strength Concrete. Let assume the maximum applied load is 400 KN = 400000 N. Cross-sectional area of cube =15 x 15 = 225 cm². Compressive strength of concrete = 400000/225 = 1778 N/cm² = 1778/9.81 = 181 Kg/cm² [1kg =9.81 ...