28-Day Concrete Compressive Strength Solution

STEP 0: Pre-Calculation Summary
Formula Used
28 Day Compressive Strength of Concrete = 7 Day Compressive Strength+(30*sqrt(7 Day Compressive Strength))
fc = S7+(30*sqrt(S7))
This formula uses 1 Functions, 2 Variables
Functions Used
sqrt - A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number., sqrt(Number)
Variables Used
28 Day Compressive Strength of Concrete - (Measured in Pascal) - 28 Day Compressive Strength of Concrete is defined as the strength of the concrete after 28 days of using it.
7 Day Compressive Strength - (Measured in Megapascal) - The 7 Day Compressive Strength achieved by concrete at 7 days is about 65% and at 14 days is about 90% of the target strength.
STEP 1: Convert Input(s) to Base Unit
7 Day Compressive Strength: 4.5 Megapascal --> 4.5 Megapascal No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
fc = S7+(30*sqrt(S7)) --> 4.5+(30*sqrt(4.5))
Evaluating ... ...
fc = 68.1396103067893
STEP 3: Convert Result to Output's Unit
68.1396103067893 Pascal -->6.81396103067893E-05 Megapascal (Check conversion here)
FINAL ANSWER
6.81396103067893E-05 6.8E-5 Megapascal <-- 28 Day Compressive Strength of Concrete
(Calculation completed in 00.004 seconds)

Credits

Created by Ishita Goyal
Meerut Institute of Engineering and Technology (MIET), Meerut
Ishita Goyal has created this Calculator and 500+ more calculators!
Verified by Chandana P Dev
NSS College of Engineering (NSSCE), Palakkad
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19 Compression Calculators

Volumetric Strain given Change in Length, Breadth and Width
Go Volumetric Strain = Change in Length/Length of Section+Change in Breadth/Breadth of Bar+Change in Depth/Depth of Bar
28-Day Concrete Compressive Strength
Go 28 Day Compressive Strength of Concrete = 7 Day Compressive Strength+(30*sqrt(7 Day Compressive Strength))
Volumetric Strain given Change in Length
Go Volumetric Strain = (Change in Length /Length of Section)*(1-2*Poisson's Ratio)
Volumetric Strain using Young's Modulus and Poisson's Ratio
Go Volumetric Strain = (3*Tensile Stress*(1-2*Poisson's Ratio))/Young's Modulus
Poisson's Ratio using Bulk Modulus and Young's Modulus
Go Poisson's Ratio = (3*Bulk Modulus-Young's Modulus)/(6*Bulk Modulus)
Poisson's Ratio given Volumetric Strain and Longitudinal Strain
Go Poisson's Ratio = 1/2*(1-Volumetric Strain/Longitudinal Strain)
Longitudinal Strain given Volumetric Strain and Poisson's Ratio
Go Longitudinal Strain = Volumetric Strain/(1-2*Poisson's Ratio)
Volumetric Strain of Cylindrical Rod using Poisson's Ratio
Go Volumetric Strain = Longitudinal Strain*(1-2*Poisson's Ratio)
Lateral Strain given Volumetric and Longitudinal Strain
Go Lateral Strain = -(Longitudinal Strain-Volumetric Strain)/2
Longitudinal Strain given Volumetric and Lateral Strain
Go Longitudinal Strain = Volumetric Strain-(2*Lateral Strain)
Volumetric Strain of Cylindrical Rod
Go Volumetric Strain = Longitudinal Strain-2*(Lateral Strain)
Volumetric Strain given Longitudinal and Lateral Strain
Go Volumetric Strain = Longitudinal Strain+2*Lateral Strain
Bulk Modulus using Young's Modulus
Go Bulk Modulus = Young's Modulus/(3*(1-2*Poisson's Ratio))
Modulus of Rupture of Concrete
Go Modulus of Rupture of Concrete = 7.5*((Characteristic Compressive Strength)^(1/2))
Direct Stress for given Bulk Modulus and Volumetric Strain
Go Direct Stress = Bulk Modulus*Volumetric Strain
Volumetric Strain given Bulk Modulus
Go Volumetric Strain = Direct Stress/Bulk Modulus
Bulk Modulus given Direct Stress
Go Bulk Modulus = Direct Stress/Volumetric Strain
28-Day Concrete Compressive Strength given Water Cement Ratio
Go 28 Day Compressive Strength of Concrete = (2700*Water Cement Ratio)-760
Water Cement Ratio given 28-Day Concrete Compressive Strength
Go Water Cement Ratio = (28 Day Compressive Strength of Concrete+760)/2700

28-Day Concrete Compressive Strength Formula

28 Day Compressive Strength of Concrete = 7 Day Compressive Strength+(30*sqrt(7 Day Compressive Strength))
fc = S7+(30*sqrt(S7))

What is Compressive Strength?

Compressive strength is defined as the strength of the concrete below which not more than 5% of the test results are expected to fall.

How to Calculate 28-Day Concrete Compressive Strength?

28-Day Concrete Compressive Strength calculator uses 28 Day Compressive Strength of Concrete = 7 Day Compressive Strength+(30*sqrt(7 Day Compressive Strength)) to calculate the 28 Day Compressive Strength of Concrete, The 28-Day Concrete Compressive Strength formula is defined as the characteristic compressive strength of 150mm size cubes tested at 28 days as per the Indian standards. 28 Day Compressive Strength of Concrete is denoted by fc 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 (S7) and hit the calculate button. Here is how the 28-Day Concrete Compressive Strength calculation can be explained with given input values -> 6.8E-11 = 4500000+(30*sqrt(4500000)).

FAQ

What is 28-Day Concrete Compressive Strength?
The 28-Day Concrete Compressive Strength formula is defined as the characteristic compressive strength of 150mm size cubes tested at 28 days as per the Indian standards and is represented as fc = S7+(30*sqrt(S7)) or 28 Day Compressive Strength of Concrete = 7 Day Compressive Strength+(30*sqrt(7 Day Compressive Strength)). The 7 Day Compressive Strength achieved by concrete at 7 days is about 65% and at 14 days is about 90% of the target strength.
How to calculate 28-Day Concrete Compressive Strength?
The 28-Day Concrete Compressive Strength formula is defined as the characteristic compressive strength of 150mm size cubes tested at 28 days as per the Indian standards is calculated using 28 Day Compressive Strength of Concrete = 7 Day Compressive Strength+(30*sqrt(7 Day Compressive Strength)). To calculate 28-Day Concrete Compressive Strength, you need 7 Day Compressive Strength (S7). With our tool, you need to enter the respective value for 7 Day Compressive Strength and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate 28 Day Compressive Strength of Concrete?
In this formula, 28 Day Compressive Strength of Concrete uses 7 Day Compressive Strength. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • 28 Day Compressive Strength of Concrete = (2700*Water Cement Ratio)-760
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