How to calculate the compressive strength of 28 days of
concrete where we have 7 days compressive strength?
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Answer Posted / sjtbehera
compressive strength of 28 days or 7 days can be obtained
from compresseve testing machines. but As per IS code
minimum strength can not beyond strength of 28 days or 7
days
example- M 25= after 28 dyas strength should be 25 N/MM2
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