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Q: .
question image
  • A. Blown
  • B. Residual
  • C. Cutback
  • D. Penetration
Correct Answer: Option D - Penetration test:- It is a measure of the hardness of the bituminous material. It is the depth in mm to which the standard tapered needle penetrates vertically under a load of 100 g in 5 second at a temperature of 25ºC. • The specification 80/100 means that the penetration is between 8 to 10 mm.
D. Penetration test:- It is a measure of the hardness of the bituminous material. It is the depth in mm to which the standard tapered needle penetrates vertically under a load of 100 g in 5 second at a temperature of 25ºC. • The specification 80/100 means that the penetration is between 8 to 10 mm.

Explanations:

Penetration test:- It is a measure of the hardness of the bituminous material. It is the depth in mm to which the standard tapered needle penetrates vertically under a load of 100 g in 5 second at a temperature of 25ºC. • The specification 80/100 means that the penetration is between 8 to 10 mm.