# Civil Engineering - Concrete Technology - Discussion

Discussion Forum : Concrete Technology - Section 3 (Q.No. 1)

1.

Permissible compressive strength of M 150 concrete grade is

Discussion:

27 comments Page 1 of 3.
RDJ said:
3 years ago

What is permissible TENSILE strength of M150 concrete?

Shaban Kumar Mandal said:
4 years ago

But what is the tensile compressive strenth of concrete?

Mohammad Al-Sous said:
5 years ago

kgf/cm^2 value = MPa value x 10.1972.

Kishan mandal said:
6 years ago

150Kg/cm^2 is the correct answer.

Makvana Disha said:
6 years ago

Here, permissible strength is required to be determine fck 150 is already given. So, permissible strength= fck/partial safety factor.

150/1.5 = 100 kg/sq.cm.

fck = characteristic compressive strength of concrete at 28 days after curing.

150/1.5 = 100 kg/sq.cm.

fck = characteristic compressive strength of concrete at 28 days after curing.

Raviraj Patel said:
6 years ago

It's 150 because M150 means M denotes design mix of concrete and 150 denotes the permissible comprehensive strength of concrete after 28 days of 150mm cube.

Like GRADE OF CONCRETE- CSO CONCRETE

M15 15

M20 20 Etc

Like GRADE OF CONCRETE- CSO CONCRETE

M15 15

M20 20 Etc

Sonu Raj said:
6 years ago

What the difference between permissible and characteristics strength?

Pankaj said:
6 years ago

100 kg/cm2 is the right answer because we allow it after failure in compressive standard unit.

Pusp Raj Bhatt said:
7 years ago

Answer should be 37.5Kg/cm2 for direct compression and 40Kg/cm2 for bending compression, 150 is Characteristic strength not permissible.

Aditya chaudhary said:
7 years ago

I think 150 kg/cm^2 is correct.

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