Civil Engineering - Structural Design Specifications - Discussion
Discussion Forum : Structural Design Specifications - Section 1 (Q.No. 28)
28.
The maximum compressive strength on 15 cm cubes of M 20 grade concrete at 7 days, should be a minimum of
Discussion:
13 comments Page 2 of 2.
Mansha Bomb said:
6 years ago
It should be 65% of 20N/mm2 i.e. 13N/mm2.
Emad nayef said:
5 years ago
The maximum compressive strength on 15 cm cubes of M 20 grade concrete at 7 days must be min 13.5, so the nearest answer is 15 (C).
(2)
Suresh said:
4 years ago
For 3 days = 30 percent,
For 7 days = 67.7 percent,
For 14 days = 90 percent,
For 28 days = 99 percent,
So, the answer is 13.5 min.
For 7 days = 67.7 percent,
For 14 days = 90 percent,
For 28 days = 99 percent,
So, the answer is 13.5 min.
(5)
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