Civil Engineering - RCC Structures Design - Discussion
Discussion Forum : RCC Structures Design - Section 1 (Q.No. 25)
25.
The minimum cube strength of concrete used for a prestressed member, is
Discussion:
37 comments Page 1 of 4.
PIYUSH SINGH said:
1 decade ago
For Post tensioning work minimum grade of concrete as specified in IS 1343 is M35, while for Pre-tension prestressed work grade of concrete specified in IS 1343 is M40.
Clause 6.1 Table 1 IS 1343.
Clause 6.1 Table 1 IS 1343.
SACHIN KUMAR said:
1 decade ago
M35 is minimum required concrete for prestressed concrete.
Here 35 is in N/mm2. So convert it into kg/cm2.
N/mm2 = 10 kg/cm2.
So 35 N/mm2 = 350 Kg/cm2.
So OPTION [D] IS CORRECT.
Here 35 is in N/mm2. So convert it into kg/cm2.
N/mm2 = 10 kg/cm2.
So 35 N/mm2 = 350 Kg/cm2.
So OPTION [D] IS CORRECT.
Binosh said:
9 years ago
Prestressing losses in post-tensioned and pre-tensioned beams are respectively.
A) 15% and 20%
b) 20% and 15%
C) 15% and 15%
d) 20% and 20%.
Please tell me the answer.
A) 15% and 20%
b) 20% and 15%
C) 15% and 15%
d) 20% and 20%.
Please tell me the answer.
(3)
Agor said:
4 years ago
They asked for "minimum" strength of concrete. So that answer is option D. Because from the pre-tensioning (M40) and post-tensioning (M35), the minimum strength is M35.
(2)
BHASKAR MANNA said:
8 years ago
It is not clear from the question whether the prestressed concrete is pre-tension or post-tension.
If pre-tension = 40 N/mm2.
Post-tension = 35 N/mm2.
If pre-tension = 40 N/mm2.
Post-tension = 35 N/mm2.
Suriya said:
9 years ago
Pre-tensioned and post-tension is the type of prestress beam.
So, the minimum concrete grade is option D = 350 kg/cm2.
So, the minimum concrete grade is option D = 350 kg/cm2.
Tanmoy karmakar said:
6 years ago
For Post Tension Minimum Grade M30 and For Pre Tension Minimum Grade M40.
So the Answer is 300 kg/cm square.
So the Answer is 300 kg/cm square.
Mantu said:
7 years ago
Prestressed - minimum 35& maximum -40grade of concrete is used.
So, 35N/mm^2 or 350kg/cm^2 is correct.
So, 35N/mm^2 or 350kg/cm^2 is correct.
PRASHANT said:
7 years ago
Here question is prestresses concrete not pre or pro-tension so, option 4 is right.
M.K.AJAY said:
5 years ago
@Binosh.
The answer is A.
Post-tensioning loss is less than pre-tensioning loss.
The answer is A.
Post-tensioning loss is less than pre-tensioning loss.
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