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Rapid hardening cement attains early strength due to:
1. lesser proportion of lime grinded finer than normal cement
2. larger proportion of lime grinded coarser than normal cement
3. lesser proportion of lime grinded coarser than normal cement
4. larger proportion of lime grinded finer than normal cement

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Correct Answer - Option 4 : larger proportion of lime grinded finer than normal cement

Explanation:

Rapid hardening cement:

  • It is also called high early strength cement.
  • It attains due to a larger proportion of lime grinded finer than normal cement.
  • It has a high specific surface area.
  • Contains a high percentage of Tri-calcium silicate(C3S) and the low percentage of Di-calcium silicate(C2S).
  • Suitable for road repairing work and in structures where the load is applied in a short time
  • Unsuitable for mass concreting work, such as bridges, dams, etc.

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