What does M in M20 grade of concrete stand for?
Analysis & Theory
The 'M' stands for 'Mix' in concrete grades like M20, M25, etc.
What is the compressive strength of M20 grade concrete after 28 days?
Analysis & Theory
M20 means the concrete has a characteristic compressive strength of 20 MPa after 28 days.
Which of the following is a high strength grade of concrete?
Analysis & Theory
M60 is a high-strength concrete mix commonly used in specialized structures.
Which concrete grade is commonly used for residential slab construction?
Analysis & Theory
M20 is the minimum recommended grade for RCC (Reinforced Cement Concrete) in residential construction.
What does M25 mean in concrete mix?
B
25 kg cement per cubic meter
C
25 MPa compressive strength
Analysis & Theory
M25 means the concrete achieves 25 MPa compressive strength in 28 days.
Which of the following is NOT a standard grade of concrete?
Analysis & Theory
M18 is not a standard grade of concrete as per IS 456:2000.
Which grade of concrete is most suitable for pavement quality concrete (PQC)?
Analysis & Theory
M40 or higher grades are used for pavement quality concrete due to high strength and durability.
What is the typical mix ratio for M20 grade concrete?
Analysis & Theory
M20 concrete has a nominal mix ratio of 1 part cement, 1.5 parts sand, and 3 parts aggregate.
Which IS code defines the grades of concrete?
Analysis & Theory
IS 456:2000 is the code that defines grades and strength of concrete.
Which of the following is considered a nominal mix of concrete?
Analysis & Theory
Concrete grades up to M20 are usually considered nominal mixes.