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Hardness

On which of t...

Question

On which of the following is the working principle of concrete hammer for non-destructive test based?

A

Rebound deflections

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B

Radioactive waves

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C

Ultrasonic pulse

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D

Creep-recovery

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Solution

The correct option is A Rebound deflections
Rebound hammer test uses the elastic properties of concrete to determine the hardness. In rebound hammer test, hardness is determined by striking the plunger against concrete and then noting its rebound deflection.

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