What is meant by Characteristic Strength of concrete/concretemix and how is it r

What is meant by Characteristic Strength of concrete/concretemix and how is it related to the 28 day cube strength. Are these defined in either or both B ritish Standards or Eurocodes?

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What is meant by Characteristic Strength of concrete/concretemix and how is it related to the 28 day..

Answer / suraj verma

Characteristic strength is the strength below which only 5% of test carried out on given identical cubes are expected to fail.

Where as 28day strenght is the mean strength of all the tests acarried out on a given set of samples.

So they both are different things.

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