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Q: The aggregates are tested by alternate wetting and drying in which of the following tests?
  • A. Crushing strength test
  • B. Abrasion test
  • C. Durability test
  • D. Attrition test
Correct Answer: Option C - Durability test– The tests are carried out by alternate wetting and drying and by freezing and thawing. Crushing test– Gives a relative measure of the resistance of an aggregate to crushing under gradually applied compressive load. • The aggressive crushing value should not be greater than 30% for the surface course and 45% for the base course.
C. Durability test– The tests are carried out by alternate wetting and drying and by freezing and thawing. Crushing test– Gives a relative measure of the resistance of an aggregate to crushing under gradually applied compressive load. • The aggressive crushing value should not be greater than 30% for the surface course and 45% for the base course.

Explanations:

Durability test– The tests are carried out by alternate wetting and drying and by freezing and thawing. Crushing test– Gives a relative measure of the resistance of an aggregate to crushing under gradually applied compressive load. • The aggressive crushing value should not be greater than 30% for the surface course and 45% for the base course.