Question
Download Solution PDFThe approximate ratio of ingredients for concrete mix of M20 is :
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation
The nominal mixes of fixed cement-aggregate ratio (by volume) vary widely in strength and may result in under- or over-rich mixes.
For this reason, the minimum compressive strength has been included in many specifications. These mixes are termed standard mixes.
IS 456-2000 has designated the concrete mixes into a number of grades as M10, M15, M20, M25, M30, M35, and M40.
In this designation, the letter M refers to the mix and the number to the specified 28-day cube strength of mix in N/mm2. The mixes of grades are as follows:
|
Strength |
Nominal Mix Design |
|
M10 |
1:3:6 |
|
M15 |
1:2:4 |
|
M20 |
1:1.5:3 |
|
M25 |
1:1:2 |
The proportion is used for showing the amount of cement, sand, and coarse aggregate in the concrete. The specification should also say if those proportions are by weight or volume
Last updated on Mar 26, 2025
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