Civil Engineering - Structural Design Specifications - Discussion
Discussion Forum : Structural Design Specifications - Section 1 (Q.No. 35)
35.
The minimum compressive strength on 15 cm cubes of M 30 grade concrete at 7 days, should be a minimum of
Discussion:
4 comments Page 1 of 1.
Hari said:
12 months ago
The minimum compressive strength of the M20 grade of concrete at 7 days is 19.5 (30 *0.65).
(1)
Bishnu Joshi said:
4 years ago
3 day strength at list 1/2 of 28-day strength and 2/3 of 28-day strength for 7 days.
So, 2/3 * 20 * 2/3 * 40 = 1/2.
So, 2/3 * 20 * 2/3 * 40 = 1/2.
Rohit said:
7 years ago
At 7 day minin compressive strength is 65%.
So 30*65/100=19.50.
So 30*65/100=19.50.
(3)
Pankaj Teware said:
1 decade ago
7 days strength is = (2/3)*Fck.
(1)
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