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Q: Pick up the correct statement from the following
  • A. Water enables chemical reaction to take place with cement
  • B. Water lubricates the mixture of gravel, sand and cement
  • C. Only a small quantity of water is required for hydration of cement
  • D. All option are correct
Correct Answer: Option D - Water and its quality plays an important role in determining the quality of concrete. Strength and durability of concrete is to a large extent determined by its water to cement ratio. Water starts the chemical reaction in the cement. About 38% of water is needed for the complete chemical reaction of the cement. It increases the workability by lubricating the mixture.
D. Water and its quality plays an important role in determining the quality of concrete. Strength and durability of concrete is to a large extent determined by its water to cement ratio. Water starts the chemical reaction in the cement. About 38% of water is needed for the complete chemical reaction of the cement. It increases the workability by lubricating the mixture.

Explanations:

Water and its quality plays an important role in determining the quality of concrete. Strength and durability of concrete is to a large extent determined by its water to cement ratio. Water starts the chemical reaction in the cement. About 38% of water is needed for the complete chemical reaction of the cement. It increases the workability by lubricating the mixture.