For the same cement content and water-cement ratio, reducing the maximum size of coarse aggregate generally tends to
Correct answer: D. Increase the surface area requiring paste
- A. Stop hydration of the cement paste
- B. Decrease the total aggregate surface area
- C. Eliminate the need for compaction
- D. Increase the surface area requiring paste
Explanation
Smaller aggregate particles provide a greater total surface area, so more paste is needed to coat them and maintain comparable workability. Reducing aggregate size does not stop hydration or remove the need for compaction.
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About Concrete Technology
Concrete technology covers cement, aggregates, water and admixtures, including their properties, proportioning and effect on fresh and hardened concrete. It explains workability, water-cement ratio, setting, hydration, strength, durability, curing, mix design and common defects, while distinguishing segregation and bleeding from general loss of workability.
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