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Q: The ideal range of the w/c ratio for the complete hydration of cement is
  • A. 0.25 – 0.35
  • B. 0.35 – 0.45
  • C. 0.45 – 0.55
  • D. 0.55 – 0.65
Correct Answer: Option B - Water/cement ratio per complete hydration of cement is 0.35-0.45. • Approximately 23% water by weight is required for hydration. • To complete all chemical reaction and 15% water is entrapped in between the voids of cement. • The total water required for complete hydration and workability is 38% by weight.
B. Water/cement ratio per complete hydration of cement is 0.35-0.45. • Approximately 23% water by weight is required for hydration. • To complete all chemical reaction and 15% water is entrapped in between the voids of cement. • The total water required for complete hydration and workability is 38% by weight.

Explanations:

Water/cement ratio per complete hydration of cement is 0.35-0.45. • Approximately 23% water by weight is required for hydration. • To complete all chemical reaction and 15% water is entrapped in between the voids of cement. • The total water required for complete hydration and workability is 38% by weight.