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28-Day Concrete Compressive Strength Formula

Go28-Day Concrete Compressive Strength given Water Cement Ratio Formula

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28 Day Compressive Strength of Concrete is defined as the strength of the concrete after 28 days of using it. Check FAQs

f c = S 7 + (30 \cdot \sqrt{S 7})

f_c - 28 Day Compressive Strength of Concrete?S₇ - 7 Day Compressive Strength?

28-Day Concrete Compressive Strength Example

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Here is how the 28-Day Concrete Compressive Strength equation looks like with Values.

Here is how the 28-Day Concrete Compressive Strength equation looks like with Units.

Here is how the 28-Day Concrete Compressive Strength equation looks like.

6.8E-5 = 4.5 + (30 \cdot \sqrt{4.5})

6.8E-5MPa = 4.5MPa + (30 \cdot \sqrt{4.5MPa})

6.8E-5 = 4.5 + (30 \cdot \sqrt{4.5})

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28-Day Concrete Compressive Strength Solution

Follow our step by step solution on how to calculate 28-Day Concrete Compressive Strength?

FIRST Step Consider the formula

f c = S 7 + (30 \cdot \sqrt{S 7})

Next Step Substitute values of Variables

∴

f c = 4.5MPa + (30 \cdot \sqrt{4.5MPa})

Next Step Prepare to Evaluate

∴

f c = 4.5 + (30 \cdot \sqrt{4.5})

Next Step Evaluate

∴

f c = 68.1396103067893Pa

Next Step Convert to Output's Unit

∴

f c = 6.81396103067893E-05MPa

LAST Step Rounding Answer

∴

f c = 6.8E-5MPa

28-Day Concrete Compressive Strength Formula Elements

Variables

Functions

28 Day Compressive Strength of Concrete

28 Day Compressive Strength of Concrete is defined as the strength of the concrete after 28 days of using it.

Symbol: f_c

Measurement: StressUnit: MPa

Note: Value should be greater than 0.

Formulas to find 28 Day Compressive Strength of Concrete

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.

Symbol: S₇

Measurement: PressureUnit: MPa

Note: Value should be greater than 0.

Formulas to find 7 Day Compressive Strength

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.

Syntax: sqrt(Number)

Other Formulas to find 28 Day Compressive Strength of Concrete

Go 28-Day Concrete Compressive Strength given Water Cement Ratio

f c = (2700 \cdot CW) - 760

Other formulas in Compression category

Go Water Cement Ratio given 28-Day Concrete Compressive Strength

CW = \frac{f c + 760}{2700}

Go Bulk Modulus given Direct Stress

K = \frac{σ}{ε v}

Go Bulk Modulus using Young's Modulus

K = \frac{E}{3 \cdot (1 - 2 \cdot 𝛎)}

Go Direct Stress for given Bulk Modulus and Volumetric Strain

σ = K \cdot ε v

How to Evaluate 28-Day Concrete Compressive Strength?

28-Day Concrete Compressive Strength evaluator uses 28 Day Compressive Strength of Concrete = 7 Day Compressive Strength+(30*sqrt(7 Day Compressive Strength)) to evaluate 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 f_c symbol.

How to evaluate 28-Day Concrete Compressive Strength using this online evaluator? To use this online evaluator for 28-Day Concrete Compressive Strength, enter 7 Day Compressive Strength (S₇) and hit the calculate button.

FAQs on 28-Day Concrete Compressive Strength

What is the formula to find 28-Day Concrete Compressive Strength?

The formula of 28-Day Concrete Compressive Strength is expressed as 28 Day Compressive Strength of Concrete = 7 Day Compressive Strength+(30*sqrt(7 Day Compressive Strength)). Here is an example- 6.8E-11 = 4500000+(30*sqrt(4500000)).

How to calculate 28-Day Concrete Compressive Strength?

With 7 Day Compressive Strength (S₇) we can find 28-Day Concrete Compressive Strength using the formula - 28 Day Compressive Strength of Concrete = 7 Day Compressive Strength+(30*sqrt(7 Day Compressive Strength)). This formula also uses Square Root (sqrt) function(s).

What are the other ways to Calculate 28 Day Compressive Strength of Concrete?

Here are the different ways to Calculate 28 Day Compressive Strength of Concrete-

28 Day Compressive Strength of Concrete=(2700*Water Cement Ratio)-760

Can the 28-Day Concrete Compressive Strength be negative?

No, the 28-Day Concrete Compressive Strength, measured in Stress cannot be negative.

Which unit is used to measure 28-Day Concrete Compressive Strength?

28-Day Concrete Compressive Strength is usually measured using the Megapascal[MPa] for Stress. Pascal[MPa], Newton per Square Meter[MPa], Newton per Square Millimeter[MPa] are the few other units in which 28-Day Concrete Compressive Strength can be measured.

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