What should be the min.compressive strength of cc cube
after 7 days testing and 28 days testing for M25 design mix
conc.?pl give idea with relavant is code
Answers were Sorted based on User's Feedback
Answer / pk singh
67percent for 7 days
100 percent 0r more for 28 days
is 456 -2000 code is refered
| Is This Answer Correct ? | 41 Yes | 10 No |
Answer / mohammed aaqhil inayath
It depends on the grade of concrete you use. If it is M25
then 65% of the total strength(i.e. 65% of 25 n/mm2)
| Is This Answer Correct ? | 38 Yes | 20 No |
Answer / saumik mallick
After 7 Days the test result will be 67% of the Target Mean
Strength and after 28 days the test result will be 100% or
more than target mean strength.
i.e Target mean Strength (fck')= fck+(1.65*S)=
25+(1.65*5)=33.25 Mpa.
| Is This Answer Correct ? | 16 Yes | 4 No |
Answer / m g patel
First it is depends upon curing peried,when proper curing
then i show 85 percent strength in 7 days and 120 percent
strength in 28 days in m-25 concrete.
| Is This Answer Correct ? | 11 Yes | 5 No |
Answer / kkn
ANY CODE FOR 7DAYS CUBE RESULT,BUT IS 456 ONLY AFETR 28
DAYS ONLY WE CONCLUDE THE STRENTGH
| Is This Answer Correct ? | 7 Yes | 1 No |
Answer / vijay khankra
65 percent Strength for 7 days and
99 percent 0r more for 28 days.....
| Is This Answer Correct ? | 5 Yes | 0 No |
Answer / dantroliya mujtaba
M 15=10 N/mm²
M20=13.5N/mm²
M25=17N/mm²
M30=20N/mm²
| Is This Answer Correct ? | 3 Yes | 1 No |
Answer / viren lagwal
after 7 days strength of cc cube is 17n/sq.mm and after 28 25 n/sq.mm
| Is This Answer Correct ? | 1 Yes | 0 No |
As per Kandal suggestions, we have implemented rolling starts on 140 (+/- 5) degrees and we kept 3 rollars to complete the rolling before falling 125 degrees and the Aggregate AIV is below 22. But When the DBM bed is being rolled 3rd high viabration, (Before 1 plain & low ,2 high Viabrations), the aggregate is getting sharp edge agg. projections are damaged. As the literature is said that, the VG-30 Grade having better control the temp. susceptibility than Penetration grade. if so we could not get this problem at site. But we are facing on site. let me know.
please send me bhel questions on rupesh.017@rediffmail.com
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