Question

What is the recommended slump of concrete for normal RCC work?

• A. ( 25 , mm to) , 50 , mm)
• B. ( 70 , mm to) , 80 , mm)
• C. ( 80 , mm to) , 150 , mm)
• D. ( 160 , mm to) , 180 , mm)

Hint:

The ideal slump range for normal RCC work is between 80 mm and 150 mm to ensure the right balance of workability and strength.

Answer 1

The Correct Option is C

The slump test is conducted to measure the workability of concrete, particularly for reinforced cement concrete (RCC) work. It helps assess the consistency and flowability of the mix.
For normal RCC work, the recommended slump range is between 80 mm and 150 mm. This range provides an optimal balance between the ease of mixing, placing, and compacting concrete, while ensuring that it has the required strength and durability.
A slump value below 80 mm indicates stiff concrete that may be difficult to work with, while a slump value above 150 mm indicates a very wet mix that may result in segregation and reduced strength.