Question

The slump recommended for mass concrete is about -

• A. 50 mm to 100 mm
• B. 25 mm to 75 mm
• C. 100 mm to 125 mm
• D. None of these

Answer 1

The correct option is B 25 mm to 75 mm

Recommended slumps of concrete:
$\begin{array}{ccc}\text{No}& \text{Type of concrete}& \text{Slump}\\ 1.& \text{Concrete for road construction}& 20to40\text{mm}\\ 2.& \text{Beams and slabs}& 50to100\text{mm}\\ 3.& \text{Mass concrete}& 25to50\text{mm}\\ 4.& \text{Normal RCC works}& 80to150\text{mm}\\ 5.& \text{Impermeable work}& 75to120\text{mm}\\ 6.& \text{Concrete to be vibrated}& 10to20\text{mm}\end{array}$