which grade of concrete is the strongest?
M20,M25,M30,M35 or M40?
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Answer Posted / sivasankar.s
M-40,M-20 At any grade of concrete depending on as per the
client requirements, but any grade of concrete curing time
7 to 28 days means the compreesive strength should be
(20n/mm2) 7 days (40n/mm2)28 days
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