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Q: Deleterious substances in aggregate are undesirable because they may:
  • A. affect the strength, workability and long term performance of concrete
  • B. have intrinsic weakness, softness and fineness
  • C. interfere with the chemical reaction of hydration
  • D. All option are correct
Correct Answer: Option D - The deleterious substances such as organic substances, wood, clay, silt, other chemicals are undesirable in the aggregates because they alter the property of aggregate upto a large extent. They affects the strength, workability and long term performance of concrete also interfere between the chemical reactions.
D. The deleterious substances such as organic substances, wood, clay, silt, other chemicals are undesirable in the aggregates because they alter the property of aggregate upto a large extent. They affects the strength, workability and long term performance of concrete also interfere between the chemical reactions.

Explanations:

The deleterious substances such as organic substances, wood, clay, silt, other chemicals are undesirable in the aggregates because they alter the property of aggregate upto a large extent. They affects the strength, workability and long term performance of concrete also interfere between the chemical reactions.