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Question
what is the compresive strength  of m20 concrete at 7 day
 Question Submitted By :: Civil-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
Its should be 65-67% of m20 = 13.4KN/mm2 
Is This Answer Correct ?    39 Yes 7 No
Modipraveen
 
Answer
# 2
as m20 is specification .as we know compressive strength of
M20 after curing will be 20kn/m2.but after 7 days it will
gain 60% strength..........
 
Is This Answer Correct ?    43 Yes 18 No
Ak Mishra
 
 
 
Answer
# 3
it should be 67% in 7 days. 13.4 N/mm2 
Is This Answer Correct ?    14 Yes 1 No
Prabin J
 
Answer
# 4
IT SH'D have 2/3 of its strength after 7 days 
Is This Answer Correct ?    11 Yes 3 No
Nakkeeran.raja
 
Answer
# 5
the concrete must have attained 2/3 of the streght = 13.5-14kn/m2 
Is This Answer Correct ?    7 Yes 0 No
Ginikanwa Nuga Adiele
 
Answer
# 6
It should be 60-65% 
Is This Answer Correct ?    17 Yes 13 No
K.sivasaravanan
 
Answer
# 7
M20 7 days strength

Ft = t
-------- x f28 f28 is strength of 28 days
a+bt
a & b are imperial constants

a = 4.70
b= 0.833

given formula f 7 = 7
------------ x 20
4.7+.833 x 7

=0.665 x 20
=13.3
 
Is This Answer Correct ?    2 Yes 0 No
Ranjan
 
Answer
# 8
according to IS456-2000 it will be 175kg/sqcm 
Is This Answer Correct ?    2 Yes 1 No
Sjtbehera
 
Answer
# 9
60 to 66% 
Is This Answer Correct ?    1 Yes 0 No
Sanketh Kulal
 
Answer
# 10
for 7 days: 60 -70%,for 14 days : 80 - 90% , for 28 days : 100 %
for all types of grade
 
Is This Answer Correct ?    1 Yes 0 No
Munish Neb
 

 
 
 
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