Question

workability of concrete is directly proportional to

Answer 1

Hey
your Answer
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That's why it is directly proportional to grading of the aggregates. Explanation: Workability of concrete is inversely proportional to Water cement ratio because if the amount of w/c ratio increases, workability decreases.
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Answer 2

Grading of aggregate

Explanation:

Workability should be obtained by the use of a well-graded aggregate which has the largest maximum particle size possible. Poor grading reduces consistency. That's why it is directly proportional to grading of the aggregates.