# Civil Engineering - Concrete Technology - Discussion

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

1.

Permissible compressive strength of M 150 concrete grade is

 [A]. 100 kg/cm2 [B]. 150 kg/cm2 [C]. 200 kg/cm2 [D]. 250 kg/cm2 [E]. 300 kg/cm2

Explanation:

No answer description available for this question.

 Subrat Barad said: (Apr 9, 2014) I know that compressive strength of M150 is 150kg/cm2, but it is 200kg/cm2 how?

 123 said: (Aug 14, 2014) I know that compressive strength of M150 is 150kg/cm2, but it is 200kg/cm2 how?

 Rohit Rajak said: (Sep 12, 2014) I know that compressive strength of M150 is 150kg/cm2.

 Jay Shah said: (Jan 26, 2015) It has to be 150 kg/cm2.

 A.K.Das said: (Mar 9, 2015) Due to current magine.

 Vivek Rauniyar said: (May 9, 2015) For M150 the compressive is 150 kg/cm2 but this is ultimate compressive strength not permissible compressive strength.

 Kirti said: (Sep 28, 2015) But permissible compressive strength must be law. How it can be more?

 Sandeep said: (Feb 13, 2016) Please explain this question?

 Sonu said: (Mar 4, 2016) Please explain this question?

 Suman Preet said: (Jun 12, 2016) 150kg/cm2 is the correct answer.

 Manoranjan said: (Sep 3, 2016) 150kg/cm^2 is the correct answer.

 Bharath E said: (Nov 3, 2016) It is 150 kg/cm^2 only. Option B is correct. Don't confuse between permissible and ultimate strength. If we design the mix for M150 grade means permissible will be 150kg/cm^2 only. Sometimes during testing due to some variations strength decreases for ex.130 or 135kg/cm^2 or 200kg/cm^2 even if we designed for M150 grade concrete. But we designed for M150 means we must conclude the answer to be 150kg/cm^2 irrespective of what ever we obtained. In SCC sometimes permissible strength varies due to trail and error Mix design methods,but here they didn't mention anything as SCC(Self Compacting Concrete) Finally, option B is correct. Hope this will clear the confusion.

 Shiv said: (Nov 6, 2016) I think it is 150. Agree @Bharath.

 P.Uday Teja Reddy said: (Nov 13, 2016) The answer should be option B.

 Rajesh Thakur said: (Nov 25, 2016) The correct answer is 150 as per SSC JE answer key.

 Aditya Chaudhary said: (Dec 4, 2016) I think 150 kg/cm^2 is correct.

 Pusp Raj Bhatt said: (Jan 29, 2017) Answer should be 37.5Kg/cm2 for direct compression and 40Kg/cm2 for bending compression, 150 is Characteristic strength not permissible.

 Pankaj said: (Jun 4, 2017) 100 kg/cm2 is the right answer because we allow it after failure in compressive standard unit.

 Sonu Raj said: (Jul 31, 2017) What the difference between permissible and characteristics strength?

 Raviraj Patel said: (Oct 4, 2017) 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

 Makvana Disha said: (Oct 4, 2017) 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.

 Kishan Mandal said: (Nov 26, 2017) 150Kg/cm^2 is the correct answer.

 Mohammad Al-Sous said: (Jul 13, 2018) kgf/cm^2 value = MPa value x 10.1972.

 Shaban Kumar Mandal said: (Mar 16, 2020) But what is the tensile compressive strenth of concrete?

 Rdj said: (Apr 27, 2020) What is permissible TENSILE strength of M150 concrete?