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Q: For ensuring quality of concrete, use
  • A. single sized aggregates
  • B. two sized aggregates
  • C. graded aggregates
  • D. coarse aggregates
Correct Answer: Option C - • A well graded sample of aggregate results in both workable and strong concrete, as more is the availability of free cement paste in this case for lubrication and better is the inter particle locking and bond strength. • Grading of the aggregate is done by particle size distribution analysis (sieve analysis).
C. • A well graded sample of aggregate results in both workable and strong concrete, as more is the availability of free cement paste in this case for lubrication and better is the inter particle locking and bond strength. • Grading of the aggregate is done by particle size distribution analysis (sieve analysis).

Explanations:

• A well graded sample of aggregate results in both workable and strong concrete, as more is the availability of free cement paste in this case for lubrication and better is the inter particle locking and bond strength. • Grading of the aggregate is done by particle size distribution analysis (sieve analysis).