In the saturated surface-dry condition, an aggregate particle
Correct answer: B. Has filled pores but a dry external surface
- A. Contains no water within its pores
- B. Has filled pores but a dry external surface
- C. Has dry pores and a wet external surface
- D. Adds all its absorbed water to the mix
Explanation
A saturated surface-dry aggregate has its internal pores filled with water, while its external surface carries no free water. Therefore, it normally neither absorbs mixing water nor contributes free water to the concrete.
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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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