Question

For under-water construction ____ is used.

A. Portland pozzolona

B. Quick setting

C. Expansive

D. Ordinary portland

Answer: Option B – Quick setting

Explanation:

  • Quick setting cement has¬†waterproof properties, thus acting as a very good hardening material for underwater construction.¬†
  • Its initial setting time is 5 mins and final setting time is 30 mins.

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