What should be the minimum grade of concrete in an RCC structure

Question

Accepted Answer

The minimum grade of concrete in an RCC structure should be M20.

The minimum grade of concrete in an RCC structure is typically M20, which means the concrete mix has a compressive strength of 20 megapascals after 28 days.
Higher grades of concrete such as M25, M30, M35, etc., can also be used depending on the structural requirements.
The grade of concrete is specified in the structural design based on factors like the type of structure, load-bearing capacity, and environmental conditions.
Using a lower grade of concrete than recommended can compromise the structural integrity of the RCC structure.
For example, in a residential building, M20 grade concrete may be sufficient, but for a high-rise building or a bridge, higher grades like M30 or M35 may be required.

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