Excessive vibration of freshly placed concrete is most likely to cause
Correct answer: D. Segregation of the mix
- A. Improved cement hydration
- B. Delayed cement expansion
- C. Reduced aggregate absorption
- D. Segregation of the mix
Explanation
Over-vibration can drive coarse aggregate downward and bring mortar or water upward, producing segregation. Vibration is useful for removing entrapped air only when applied properly.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
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.
Practise Concrete Technology
80 free Concrete Technology MCQs from Civil Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Civil Engineering questions like this
Civil Engineering is on 3 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Concrete Technology questions
The aggregate crushing value primarily measures an aggregate's resistance to
The specific gravity of ordinary Portland cement is approximately
Water added to cement paste beyond the amount needed for hydration mainly creates
A pozzolanic material improves hardened concrete mainly because it reacts with
For a fixed cement content and aggregate grading, increasing the water-cement ratio generally causes concrete permeability to
The aggregate impact value is primarily a measure of resistance to