A slump of 50-100mm can be used for:
Correct Answer: D. Beams
📚 Detailed Explanation: Application for 50-100 mm Slump
Why D (Beams) is correct: Beams are normal reinforced concrete members requiring medium workability (50–100 mm slump) to flow around reinforcement and be properly compacted. Option A (mass concreting) uses lower slump (25–75 mm) since the large volume is easy to compact with vibrators and lower w/c improves heat management. Options B (strip footing) and C (trench fill) typically use stiffer mixes (25–50 mm) since formwork confines the concrete and less flow is needed.
Slump Range Applications (IS 456)
| Slump Range | Applications |
|---|---|
| 0–25 mm | Dry lean mixes, road sub-base |
| 25–75 mm | Mass concrete, strip footings, pavements |
| 50–100 mm | Beams, slabs, columns, walls (standard RCC) |
| 100–150 mm | Pumped concrete, thin walls, tremie |
- 50–100 mm = medium workability = the standard range for all normal reinforced structural members.