How to Calculate 28-Day Concrete Compressive Strength?
28-Day Concrete Compressive Strength calculator uses 28 day compressive strength=7 day compressive strength+(30*(7 day compressive strength^(1/2))) to calculate the 28 day compressive strength, The 28-Day Concrete Compressive Strength formula is given in terms of the characteristic compressive strength of 150mm size cubes tested at 28 days as per the Indian standards. . 28 day compressive strength and is denoted by S_{28} symbol.
How to calculate 28-Day Concrete Compressive Strength using this online calculator? To use this online calculator for 28-Day Concrete Compressive Strength, enter 7 day compressive strength (S_{7)} and hit the calculate button. Here is how the 28-Day Concrete Compressive Strength calculation can be explained with given input values -> 1.03 = 1000000+(30*(1000000^(1/2))).