Question

As per IS: 456 - 2000, the range of standard concrete is:
1. M₂₅ - M₅₅
2. M₂₀ - M₅₅
3. M₂₅ - M₅₀
4. None of these

Answer 1

Correct Answer - Option 1 : M₂₅ - M₅₅

Concept:

The range of Standard Concrete is M25 - M55

Group	Grade Designation	Specified Characteristic compressive strength of 150 mm cube at 20 days in N/mm2
Ordinary Concrete (3)	M10	10
	M15	15
	M20	20
Standard Concrete (7)	M25	25
	M30	30
	M35	35
	M40	40
	M45	45
	M50	50
	M55	55
High Strength Concrete (5)	M60	60
	M65	65
	M70	70
	M75	75
	M80	80

Question is asking the range of standard concrete As per IS: 456 - 2000. So We should not be confused with the new amendment.