When concrete is remixed after partial loss of workability, the most appropriate correction is generally to
Correct answer: C. Remix it without adding water unless the specification permits adjustment
- A. Add dry coarse aggregate without changing other ingredients
- B. Add water freely until the original slump is restored
- C. Remix it without adding water unless the specification permits adjustment
- D. Allow it to set and then compact it by heavy vibration
Explanation
Remixing may restore uniformity, but adding unapproved water raises the water-cement ratio and can reduce strength and durability. Any permitted adjustment must follow the approved mix procedure, not be made freely at site.
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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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