Discussion
The fineness of finished cement is most commonly reported as
Answer: B
Correct answer: Blaine specific surface in square metres per kilogram
The Blaine air permeability test measures how readily air passes through a compacted bed of the cement and reports the result as surface area per unit mass. It correlates well with strength development and water demand, and it is quick enough to control a mill on - a result in minutes rather than the days a strength test needs.
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