Discussion :: RCC Structures Design - Section 1 (Q.No.25)
The minimum cube strength of concrete used for a prestressed member, is
Answer: Option D
No answer description available for this question.
|Sachin Kumar said: (Oct 22, 2014)|
|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.
|Mohit said: (Jul 25, 2015)|
|But in presented concrete min grade of concrete used is M40.|
|Piyush Singh said: (Sep 3, 2015)|
|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.
|Saksham said: (Nov 12, 2015)|
|Answer is incorrect min grade for pretension is m-40.|
|Avinash said: (Apr 29, 2016)|
|How to calculate 350 Kg/cm2? Please explain the solution.|
|Kuldeep said: (Jul 31, 2016)|
|What minimum bread of concrete used in RCC?|
|Saurav said: (Aug 24, 2016)|
|Minimum grade for pre stressed M45 & post stressed M-35.|
|Irfan Khan said: (Sep 16, 2016)|
The min grade of concrete for pre tension is m40.
|Sudhakar said: (Dec 8, 2016)|
|M35 for Post-tensioned concrete.
M40 for Pre-tensioned concrete.
|Suriya said: (Dec 16, 2016)|
|Pre-tensioned and post-tension is the type of prestress beam.
So, the minimum concrete grade is option D = 350 kg/cm2.
|Binosh said: (Mar 18, 2017)|
|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.
|Akshay said: (Apr 9, 2017)|
It is (a). In post, tension losses are less.
|Pawan Yadav said: (Apr 24, 2017)|
|Min grade of pre-tension m40.
Min grade of post-tension m35.
|Makar said: (Apr 26, 2017)|
|This option is correct min grade 35.|
|Debojyoti said: (May 5, 2017)|
|I think E is the correct answer.|
|Bhaskar Manna said: (May 18, 2017)|
|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.
|Puni said: (Sep 4, 2017)|
|Pre-tension = 40 N/mm2.
Post-tension = 30 N/mm2.
|Krishna said: (Sep 8, 2017)|
|Minimum grade for pre-tension - M40.
Minimum grade for post-tension - M35.
|Yogesh said: (Sep 23, 2017)|
|What is maximum grade can be used?|
|Paddy said: (Dec 3, 2017)|
|Pre Tension = M40.
Post Tension = M30.
|Chintan said: (Feb 25, 2018)|
|As per new code 2012 above answer is correct.|
|Farhan Beigh said: (Mar 17, 2018)|
|Pretensioning is 40N/mm2 and post tensioning is 30N/mm2.|
|Mannu said: (Apr 1, 2018)|
|As per is code, m40 is min grade for prestress so answer should be 400.|
|Chander said: (May 25, 2018)|
|Yes, right @Sudhakar @Paddy.|
|V Yafav said: (May 30, 2018)|
|M35 exposed to the sea coast and for submerged or partially M40 uses.|
|Mantu said: (Aug 6, 2018)|
|Prestressed - minimum 35& maximum -40grade of concrete is used.
So, 35N/mm^2 or 350kg/cm^2 is correct.
|Prashant said: (Aug 16, 2018)|
|Here question is prestresses concrete not pre or pro-tension so, option 4 is right.|
|Aushutosh said: (Aug 31, 2018)|
|The Average of pre & post is taken here.|
|Ashok said: (Oct 23, 2018)|
|Pre 40 and post 30.|
|Viru Kapoor said: (Nov 1, 2018)|
|Concrete grade used for post tension M30.
|Ratandeep said: (Jul 25, 2019)|
The answer is A.
|Tanmoy Karmakar said: (Nov 8, 2019)|
|For Post Tension Minimum Grade M30 and For Pre Tension Minimum Grade M40.
So the Answer is 300 kg/cm square.
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