Correct option is C
Below are the values of slump and their usage:
Placing Condition | Degree of Workability | Slump, mm |
Mud mat, shallow section, pavement using pavers | Very low | 0.70 – 0.80 (Compacting factor) |
Mass concrete; lightly reinforced slabs, beams, walls, columns; strip footings | Low | 25-75 |
Heavily reinforced slabs, beams, walls, columns | Medium | 50-100 |
Slip formwork, pumped concrete | Medium | 75-100 |
In situ piling, trench fill | High | 100-150 |
Tremie concrete | Very high | 150-200 (flow test as per IS 9103:1999) |
Slump Requirements:
For lightly reinforced sections in slabs, beams, and columns, a medium workability is typically desired to ensure that the concrete can be easily placed and compacted without segregation.
The slump value suitable for these applications is usually in the range of 25-75 mm. This range provides enough workability to ensure proper placement and compaction around the reinforcement without excessive segregation or bleeding.
