search
arrow-left Previous
Next arrow-right
Q: The type of aggregates not suitable for high strength concrete and for pavements subjected to tension is
  • A. rounded aggregate
  • B. irregular aggregate
  • C. angular aggregate
  • D. flaky aggregate
Correct Answer: Option A - The aggregate with rounded shape has the minimum percentage of voids ranging from 32 to 33%. It gives minimum ratio of surface area to the given volume and hence requires minimum water for lubrication. It gives good workability for the given amount of water and hence needs less cement for a given water cement ratio. The only disadvantage is that the interlocking between its particles is less and hence development of bond is poor that is why rounded aggregate is not suitable for high strength concrete and for pavement subjected to the tension.
A. The aggregate with rounded shape has the minimum percentage of voids ranging from 32 to 33%. It gives minimum ratio of surface area to the given volume and hence requires minimum water for lubrication. It gives good workability for the given amount of water and hence needs less cement for a given water cement ratio. The only disadvantage is that the interlocking between its particles is less and hence development of bond is poor that is why rounded aggregate is not suitable for high strength concrete and for pavement subjected to the tension.

Explanations:

The aggregate with rounded shape has the minimum percentage of voids ranging from 32 to 33%. It gives minimum ratio of surface area to the given volume and hence requires minimum water for lubrication. It gives good workability for the given amount of water and hence needs less cement for a given water cement ratio. The only disadvantage is that the interlocking between its particles is less and hence development of bond is poor that is why rounded aggregate is not suitable for high strength concrete and for pavement subjected to the tension.