The characteristic strength of concrete is refined as that compressiv...
The characteristic strength is defined as the strength of the concrete below which not more than 5% of the test results are expected to fall. concrete cubes of size (100 mm 3).
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The characteristic strength of concrete is refined as that compressiv...
The characteristic strength of concrete refers to the compressive strength below which not more than a certain percentage of test results fall. In this case, the correct answer is option 'B', which states that the characteristic strength is the compressive strength below which not more than 5% of test results fall.
The characteristic strength of concrete is an important parameter used in the design of structures. It is a measure of the strength of the concrete that can be relied upon with a certain level of confidence. The characteristic strength is determined through a series of tests on concrete samples.
To understand why the correct answer is option 'B', let's examine the other options:
- Option 'A' states that the characteristic strength is the compressive strength below which not more than 10% of test results fall. This would mean that a larger percentage of test results fall below the characteristic strength, indicating a lower level of confidence in the strength of the concrete.
- Option 'C' states that the characteristic strength is the compressive strength below which not more than 2% of test results fall. This would mean that a smaller percentage of test results fall below the characteristic strength, indicating a higher level of confidence in the strength of the concrete.
Neither of these options accurately represents the characteristic strength of concrete. The correct answer, option 'B', states that not more than 5% of test results fall below the characteristic strength. This strikes a balance between having a reasonable level of confidence in the strength of the concrete while allowing for a small margin of error.
In summary, the characteristic strength of concrete is refined as the compressive strength below which not more than 5% of test results fall. This value is important in the design of structures and ensures a certain level of confidence in the strength of the concrete.