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Reinforced Cement Concrete

Characteristic Compressive Strength of Concrete -I

The character...

Question

The characteristic strength of concrete is

A

higher than the average cube strength

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B

lower than the average cube strength

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C

the same as the average cube strength

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D

higher than 90% of the average cube strength

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Solution

The correct option is B lower than the average cube strength
Characteristic strength,
$f_{c k} = f_{a v} - 1.65 σ ∴ f_{c k} < f_{a v}$

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