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Q: Which of the following properties of aggregates is defined as the resistance of aggregate to failure by impact?
  • A. Specific gravity
  • B. Porosity
  • C. Toughness
  • D. Hardness
Correct Answer: Option C - Toughness is the property of aggregates that measures their resistance to failure by impact. Toughness is the ability of a materials to resist sudden impact or fracture from a Dynamic load. The aggregate impact test is used to evaluate the toughness of aggregates. The impact value of aggregate should not exceed 45% by Weight for concrete other than wearing surface, and 30% by weight for concrete for wearing surface.
C. Toughness is the property of aggregates that measures their resistance to failure by impact. Toughness is the ability of a materials to resist sudden impact or fracture from a Dynamic load. The aggregate impact test is used to evaluate the toughness of aggregates. The impact value of aggregate should not exceed 45% by Weight for concrete other than wearing surface, and 30% by weight for concrete for wearing surface.

Explanations:

Toughness is the property of aggregates that measures their resistance to failure by impact. Toughness is the ability of a materials to resist sudden impact or fracture from a Dynamic load. The aggregate impact test is used to evaluate the toughness of aggregates. The impact value of aggregate should not exceed 45% by Weight for concrete other than wearing surface, and 30% by weight for concrete for wearing surface.