Compared with rounded aggregate, angular aggregate in concrete generally requires more mixing water because it has
Correct answer: A. Greater surface area and interlocking
- A. Greater surface area and interlocking
- B. Lower specific gravity and absorption
- C. Higher cement content and fineness
- D. Greater elasticity and thermal resistance
Explanation
Angular and rough particles have greater surface area and interlock more strongly, increasing internal friction and water demand for the same workability. Rounded aggregate usually produces a more workable mix at the same water content.
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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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