Civil Engineering - RCC Structures Design - Discussion
Discussion Forum : RCC Structures Design - Section 1 (Q.No. 13)
13.
For M 150 mix concrete, according to I.S. specifications, local bond stress, is
Discussion:
40 comments Page 1 of 4.
MANU said:
1 year ago
Thankyou everyone for giving explanation of the answer.
Jer said:
2 years ago
M15 and M150 are the same, it's just that in earlier times like IS 456:1978 version we write M150 but in the latest version we use M15.
The given answer is correct, 10kg/cm2 or 1 N/mm2 for M15.
And local bond stress for M20 is 12kg/cm2 or 1. 2 N/mm2.
The given answer is correct, 10kg/cm2 or 1 N/mm2 for M15.
And local bond stress for M20 is 12kg/cm2 or 1. 2 N/mm2.
(10)
Praveen bhaskar said:
4 years ago
In wsm bond stress(N/mm2):
M15 - .6.
M20 - .8.
M25 - .9.
In lsm bond stress (N/mm2):
M15 - 1( 1N/mm2 = 10 kg/ cm2),
M20 - 1.2.
M25 - 1.4.
M15 - .6.
M20 - .8.
M25 - .9.
In lsm bond stress (N/mm2):
M15 - 1( 1N/mm2 = 10 kg/ cm2),
M20 - 1.2.
M25 - 1.4.
(6)
Abhishek said:
5 years ago
@Rohan Mukherjee.
How did you conclude that it is m15 grade?
How did you conclude that it is m15 grade?
(1)
Kedar said:
5 years ago
2/3*15 = 10kg/cm2.
(2)
Imran said:
5 years ago
Bond stress = 2/3 of conc. grade.
So,
2/3 * 15 = 10 kg/cm^2.
So,
2/3 * 15 = 10 kg/cm^2.
(8)
Rohan Mukherjee said:
5 years ago
They asked about Permissible bond stress for M15 grade concrete!
Permissible shear stress for M15 grade concrete as per IS:456-1978 is limited to 0.5 N/mm^2 or 5 Kg/cm^2.
Permissible bond stress for M15 grade concrete as per IS:456-1978 is limited to 1 N/mm^2 or 10 Kg/cm^2.
I hope you get it!!!
Permissible shear stress for M15 grade concrete as per IS:456-1978 is limited to 0.5 N/mm^2 or 5 Kg/cm^2.
Permissible bond stress for M15 grade concrete as per IS:456-1978 is limited to 1 N/mm^2 or 10 Kg/cm^2.
I hope you get it!!!
(3)
Tanmoy Karmakar said:
6 years ago
Bond strength of concrete =1/10 of compressive strength of concrete.
compressive strength of M15 concrete is 10.5 Mpa.
So, Bond strength of concrete is 1/10 *10.5 = 1.05 Mpa.
So, 10.5 or 10 kg/cm2.
compressive strength of M15 concrete is 10.5 Mpa.
So, Bond strength of concrete is 1/10 *10.5 = 1.05 Mpa.
So, 10.5 or 10 kg/cm2.
(2)
Prantik Ghosh said:
6 years ago
As per IS 456 Clause 26.2.1.1 Design Bond stress for,
M20 1.2.
M25 1.4.
M30 1.5.
M35 1.7.
M40 1.9.
After a table say that,
For deformed bars conforming to IS 1786 that value shall be increased by 60%.
So.
M20 = 20x 0.06 = 1.2 N/mm^2.
M15 = 15x 0.06 = 0.9 N/mm^2.
= 1.0 N/mm^2.
M20 1.2.
M25 1.4.
M30 1.5.
M35 1.7.
M40 1.9.
After a table say that,
For deformed bars conforming to IS 1786 that value shall be increased by 60%.
So.
M20 = 20x 0.06 = 1.2 N/mm^2.
M15 = 15x 0.06 = 0.9 N/mm^2.
= 1.0 N/mm^2.
(6)
Pk d said:
6 years ago
I think it is 4.5 N/mm2.
(2)
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