Asked by: Abdul Gangkofner
business and finance civil engineering industry

What do you mean by characteristic strength of concrete?

Last Updated: 21st February, 2020

The characteristic strength is defined as thestrength of the concrete below which not more than 5%of the test results are expected to fall. The horizontalaxis represents the values of compressive strength in MPa.The vertical axis represents the number of test samples for aparticular compressive strength.

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Thereof, how do you calculate the strength of concrete?

Calculation: The measured compressivestrength of the specimen shall be calculated bydividing the maximum load applied to the specimen during the testby the cross sectional Area, calculated from the meandimensions of the section and shall be expressed to the nearest kgper cm2.

Secondly, what is the difference between characteristic strength and design strength? Characteristic strength of concrete would alsogive us the compressive strength of a particuar mix ofconcrete. Thus, while compressive strength gives us thestrength of a single sample, characteristic strengthwould give us the probable strength based on a number ofsamples, which would be a more realistic assessment.

In this regard, what is characteristic load and strength?

Characteristic Load or ultimateload Characteristic load is that value of loadwhich has a 95 percent probability of not being exceeded during thelife time of the structure. In absence of any data, loadsgiven in various standards shall be assumed as thecharacteristic loads.

What is characteristic strength of m20 concrete?

Compressive Strength Table of Concrete at 7 & 28Days

Grade of Concrete Minimum compressive strength N/mm2 at 7 days Specified characteristic compressive strength (N/mm2) at 28days
M15 10 15
M20 13.5 20
M25 17 25
M30 20 30

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