Which of the following is a correct combination for the concrete mix vs mix design mentioned in column A and B respectively?
| List-I | List-II |
|---|---|
| a.M10 | 1.1:1:2 |
| b.M20 | 2.1:2:4 |
| c.M15 | 3.1:1.5:3 |
| d.M25 | 4.1:3:6 |
- Aa - 4, b - 2, c - 1, d - 3
- Ba - 4, b - 1, c - 2, d - 3
- Ca - 4, b - 3, c - 2, d - 1Correct
- Da - 2, b - 3, c - 4, d - 1
Solution
Concept
Nominal mix proportions
Step-by-step solution
1. M10 = 1:3:6; M15 = 1:2:4; M20 = 1:1.5:3; M25 = 1:1:2.
Explanation
These are the standard nominal mixes.
Why the other options are wrong
Other codes interchange the ratios.
Shortcut
M10 1:3:6, M15 1:2:4, M20 1:1.5:3, M25 1:1:2.
Correct answer: C) a - 4, b - 3, c - 2, d - 1