Civil Engineering - Concrete Technology - Discussion
Discussion Forum : Concrete Technology - Section 1 (Q.No. 14)
14.
Permissible compressive strength of M 300 concrete grade is
Discussion:
22 comments Page 2 of 3.
Debiprasad mukherjee said:
9 years ago
All the answer value and unit is wrong.
R SUBRAMANIAN said:
9 years ago
As per latest technology M200 and M400 grade of concrete is using in other country like Canada and New Zealand.
Gyanu said:
10 years ago
Where is used M300?
Tony said:
1 decade ago
Instead if kg/cm^2 they should have mentioned n/mm^2.
Kulendra said:
1 decade ago
But ask about Permissible compressive strength of concrete.
JITESH said:
1 decade ago
M300 grade of concrete which is in kg/m2. When we convert it in n/mm2 we get m30. That is its strength is 30n\mm2.
Rahul said:
1 decade ago
It tells about the "characteristic compressive strength" @Sandeep.
Shubham said:
1 decade ago
M300 in in kg/cm2.
We convert this to N/mm2.
1kg = 9.8N nearly 10N.
M300kg/cm2 = M300*10N/(10*10MM2) = M30N/MM2.
For M30 we know 30N/mm2 i.e 300kg/cm2.
But,in question asking for permissible comp strength. So, to obtained it divide by 3(factor's of safety for concrete)hence 100kg/cm2 is the right answer.
We convert this to N/mm2.
1kg = 9.8N nearly 10N.
M300kg/cm2 = M300*10N/(10*10MM2) = M30N/MM2.
For M30 we know 30N/mm2 i.e 300kg/cm2.
But,in question asking for permissible comp strength. So, to obtained it divide by 3(factor's of safety for concrete)hence 100kg/cm2 is the right answer.
Anil Reddy said:
1 decade ago
M300 in in kg/cm2.
We convert this to N/mm2.
1kg = 9.8N nearly 10N.
M300kg/cm2 = M300*10N/(10*10MM2) = M30N/MM2.
For M30 we know 30N/mm2 i.e 300kg/cm2.
We convert this to N/mm2.
1kg = 9.8N nearly 10N.
M300kg/cm2 = M300*10N/(10*10MM2) = M30N/MM2.
For M30 we know 30N/mm2 i.e 300kg/cm2.
Manoj said:
1 decade ago
We know that in M20, M stand to mix and 20 is the characteristic compressive strength of concrete, so as in this Q. 300 is the right answer.
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