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Q: In the grade M20 has very few mixture of .........
  • A. 1:1.5:3
  • B. 1:2:4
  • C. 1:03:06
  • D. 1:05:10
Correct Answer: Option A - • The code grades concrete as M20, where M refers to the term mix and the number specifies the characteristic strength. • M20 – 1 : 1.5 : 3 Nominal Mix. • For M20, the maximum size of aggregate permitted is 20mm. For mixes richer than M20, it may be restricted to 12mm. • M15 – 1 : 2 : 4 Nominal Mix. • M25 – 1 : 1 : 2 Nominal Mix • M10 – 1 : 3 : 6 Nominal Mix
A. • The code grades concrete as M20, where M refers to the term mix and the number specifies the characteristic strength. • M20 – 1 : 1.5 : 3 Nominal Mix. • For M20, the maximum size of aggregate permitted is 20mm. For mixes richer than M20, it may be restricted to 12mm. • M15 – 1 : 2 : 4 Nominal Mix. • M25 – 1 : 1 : 2 Nominal Mix • M10 – 1 : 3 : 6 Nominal Mix

Explanations:

• The code grades concrete as M20, where M refers to the term mix and the number specifies the characteristic strength. • M20 – 1 : 1.5 : 3 Nominal Mix. • For M20, the maximum size of aggregate permitted is 20mm. For mixes richer than M20, it may be restricted to 12mm. • M15 – 1 : 2 : 4 Nominal Mix. • M25 – 1 : 1 : 2 Nominal Mix • M10 – 1 : 3 : 6 Nominal Mix