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m-20 1:1.5:3

 Is This Answer Correct ? 369 Yes 40 No

for M15 - 1:2:4
M20 - 1:1.5;3
M25 - 1:1:2
M30 - design Mix

 Is This Answer Correct ? 266 Yes 29 No

1:1 1/2:3 for M20

 Is This Answer Correct ? 212 Yes 40 No

Two tye of mix
1- Nomilal mix
2- Desigen mis
BIS dos not permit that we assume above M25
If we want M25. code suggest us we should go for design mix.
M20 is 1:1.5:3
M25 is 1:1:2

 Is This Answer Correct ? 129 Yes 19 No

M20---1.1.5.3
M30---MIX DESIGN

 Is This Answer Correct ? 113 Yes 19 No

There are two types of mixes.
1-Nominal Mix
2-Design Mix.
M20(1:1.5:3)we can do by nominal mix as well as design mix.
But M30 & M40 we only do design mix.

 Is This Answer Correct ? 94 Yes 11 No

M 7.5 - 1:4:8
M 10 - 1:3:6
M 15 - 1:2:4
M 20 - 1:1.5:3
M 25 - 1:1.5:2
M 30 design mix

 Is This Answer Correct ? 148 Yes 74 No

1:1 1/2:3, m30 & m40 digen mix only

 Is This Answer Correct ? 69 Yes 21 No

M30 mix design & calculation

 Is This Answer Correct ? 42 Yes 6 No

M20 Grade ratio = 1:1.5:3, from
M30 & M40 Grade ratio Design Mix

 Is This Answer Correct ? 41 Yes 7 No

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