How to calculate compressive strength of concrete?

Answer Posted / gurunath khavanekar

we can also calculate the Compresive strength of concrete
by using rebound hammer test.this is an one of the NDT test
use at various sites.
in this process top end of rebound hammer kept on the
surface of concrete then giving stroke on surface of
concrete we can get the perticuler reading on bar. same as
above taking no of reading on same concrete surface and by
taking the average of reading we get the compresive
strength of concrete.

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