Answer / sjtbehera

according to IS456-2000 it will be 175kg/sqcm

Answer / mohammed aijaz hussain

Compressive Strength for M20 concrete in 7 days is 175 kg/sq.cm.

Answer / alfonso

compressive strength of concrete for 21 day curing period
is 21 MPa whic is equal to :
= 2,100 N / mm2
= 2.10 KN / mm2

for a 7 day curing period, strength will be 1/3 of the
comp.stregth.

Answer / maverick

It should be atleast 26.60 N/mm2

Answer / rajesh

135 N/mm2

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