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HOW MANY CUBES REQUIRED FOR 7 AND 28 DAYS TEST FOR ALL MIX
GRADES.
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Answer Posted / santosh kumar namdev
As per IS 456:2000 for 28 days
concrete in cmt no of samples(3 cubes)
1) 1 to 5 1
2) 6 to 15 2
3) 16 to 30 3
4) 31 to 50 4
5) 51 and above 4 plus one additional sample for
each additional 50 cmt Or nomber of 06 sample of concrete
cube 03 of 7Days and 3 of 28 Days individual Avg. compressive
strength +/- 15 %
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