Minimum Grade of Concrete for RCC

By Aina Parasher|Updated : July 7th, 2022

Minimum grade of concrete for RCC is- 

  1. M 10 
  2. M 15
  3. M 20 
  4. M 25

Answer: C. M 20

Minimum Grade of Concrete for RCC is M 20.

Solution

Grade of concrete represents the characteristics compressive strength of concrete such as M 20 represents the concrete which has characteristics compressive strength of 20 MPa.

Concrete which are used in RCC work, should be a minimum grade of M 20 in normal conditions. And concrete should have a minimum of M 30 grade when it is used at the sea coast.

Constituents of the M 20 grade of concrete are 1:1.5:3. It means that 1 part of cement requires 1.5 part of fine aggregate and 3 part of coarse aggregate to make the M 20 grade of concrete. Hence, minimum grade of concrete for RCC is M 20.

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