Interested to Buy Any Domain ? << Click Here >> for more details...
what should be the strength of Concrete cube strength for 7
days, if the designed mix is M20?
- 12 Answers
- 67601 Views
- HPCL, Shrestha Civil Engineering Construction Company Pvt. Ltd, Sri Avani Projects, Tata Projects, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / viki
generally concrete attains 60-70% of its 28 days strength
in 7 days.After 28 days strength of M20 concrete will be
20N/mm2.so after 7days it would be 12-14 N/mm2.
| Is This Answer Correct ? | 113 Yes | 28 No |
Answer / n.c.pathan
Concrete does attain strength of about 65% after a period
of 7 days. With good quality of cement nowadays available
we generally get better results. Many a times strength
exceeds 70% of 20N/SQ MM.
| Is This Answer Correct ? | 27 Yes | 10 No |
Answer / g.mugesh
Grade of concrete:m20
7days test (67.5%) - 20*67.5/100=13.35 N/MM2
28days test(100%) - 20 N/MM2
| Is This Answer Correct ? | 19 Yes | 10 No |
Answer / himanshu sekhar pradhan
Actuall all grade of concrete design upon its target
strength. Then for M20 we have to design the mix on
26.6N/mm2 and all grade of concrete should achive its 60 -
75% strength in 7days. Then the actual strength of M20
grade of concrete at 7days should be 17 -20 N/mm2.
Otherwise there is chance of fail.
| Is This Answer Correct ? | 11 Yes | 4 No |
Design mix is M20 So Target strenth is Fck+4 = 24N/MM2
For 7 Days Cube strenth is 16.24 Exact (7days@67.67%)
For Individual Cube strenth become is Fck-3 = 13.24
But Average Sternth is required is 16.24 (must)
For any Civil engineering related questions
Contact by mail skatiyar011@yahoo.in
| Is This Answer Correct ? | 10 Yes | 6 No |
Answer / sathish
Actually concrete attains 64-70% of its 28 days strength
in 7 days.After 28 days strength of M20 concrete will be
20N/mm2.so after 7days it would be 12.80 -14.00 N/mm2.
| Is This Answer Correct ? | 8 Yes | 5 No |
Answer / nithin
Is there any reference to 7 day strength in is codes.
| Is This Answer Correct ? | 4 Yes | 1 No |
Answer / sandeep
If grade of concrete is M20
Then after 7 days it will be 2/3 of 20 n/sq mm
Means 0. 666*20 = 13. 20 n/sq mm
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / devendra jatav
7 days - 70 to 75% strength
28 days - 100% strength
| Is This Answer Correct ? | 0 Yes | 5 No |
1 m^ 3 of concrete 150 x150 mm of spacing of required of steel ?
what means if slump is less than 25mm and greater than 80mm?
please send latest placement papers of hpcl officers trainee test. i will be very thankful to you.
pls give the grads of concrete and the ratios to the same
what is the difference between sill beam,Tie beam and plinth beam?
What is the spacing of chairs in reinforcement steel.If it is written in IS 456:2000 then tell me the page number.
I want to know how much the lapping length for the pilecap reinforcement.. we r using single pile cap which is 24mby54m and 2.5m depth.. total 91piles are supporting the pile cap.. how to do a steel reinforcement??
how will i find leakage in underground?
how to shuttering is used in slab
what is the bend correction for 90 degree of bend in any dia of HYSD steel reinforcement as per IS code ?
what is the basic difference between a singly reinforce section & a doubly reinforce section?
What is Niminal mix and Design Mix ? write difference between them ?
-
Civil Engineering (5086) - Mechanical Engineering (4456)
- Electrical Engineering (16639)
- Electronics Communications (3918)
- Chemical Engineering (1095)
- Aeronautical Engineering (239)
- Bio Engineering (96)
- Metallurgy (361)
- Industrial Engineering (259)
- Instrumentation (3014)
- Automobile Engineering (332)
- Mechatronics Engineering (97)
- Marine Engineering (124)
- Power Plant Engineering (172)
- Textile Engineering (575)
- Production Engineering (25)
- Satellite Systems Engineering (106)
- Engineering AllOther (1379)
