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Q: For the repair of roads–
  • A. low-heat cement is used
  • B. rapid-hardening cement is used
  • C. high-alumina cement is used
  • D. sulphate-resisting cement is used
Correct Answer: Option B - Rapid hardening cement is a special type of cement that achieves high strength in less time. • It gains strength faster than OPC. It is lighter and costlier than OPC. It is generally used for constructing road pavements, where it is important to open the road to traffic quickly. It requires a short period of curing. It is resistant to sulphate attack.
B. Rapid hardening cement is a special type of cement that achieves high strength in less time. • It gains strength faster than OPC. It is lighter and costlier than OPC. It is generally used for constructing road pavements, where it is important to open the road to traffic quickly. It requires a short period of curing. It is resistant to sulphate attack.

Explanations:

Rapid hardening cement is a special type of cement that achieves high strength in less time. • It gains strength faster than OPC. It is lighter and costlier than OPC. It is generally used for constructing road pavements, where it is important to open the road to traffic quickly. It requires a short period of curing. It is resistant to sulphate attack.