The primary purpose of a retarding admixture is to
Correct answer: C. Delay setting of concrete
- A. Cause immediate flash set
- B. Increase aggregate absorption
- C. Delay setting of concrete
- D. Remove entrained air completely
Explanation
Retarding admixtures extend the setting time, which is useful in hot weather or during long transport. They do not function by increasing aggregate absorption or causing rapid setting.
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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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