The degree of workability of concrete is said to be ‘medium’, if it has slump ranges between
- A0 and 25 mm
- B25 and 50 mm
- C50 and 100 mmCorrect
- D100 and 175 mm
Solution
Concept
Concrete slump ranges for medium workability
Formula
NONE
Step-by-step solution
1. Slump value indicates the consistency and workability classification of fresh concrete. 2. Workability is categorized into levels ranging from very low to high based on slump ranges. Answer: C
Explanation
A slump value between 50 mm and 100 mm corresponds to medium workability according to standard concrete classification. This range is suitable for normal reinforced concrete construction, flat slabs, and manually compacted structures. Therefore, option C correctly identifies the slump range for medium workability.
Why the other options are wrong
B) A slump range between 25 and 50 mm corresponds to low workability. D) A slump range between 100 and 175 mm represents very high workability.
Shortcut
Concrete slump ranges: Very Low (0-25 mm), Low (25-50 mm), Medium (50-100 mm), High (100-175 mm).
Common mistake
Confusing the medium workability slump range of 50 to 100 mm with low workability (25 to 50 mm) or high workability (100 to 175 mm).
Correct answer: C) 50 and 100 mm