VISCOSITY GRADE BITUMEN – WHAT ARE THE TYPES AND THEIR SPECIFICATIONS?

What are the Types of VG Bitumen

As per IS:73-2006 , bitumen is classified into four types based on viscosity, as given below.

  • VG-10
  • VG-20
  • VG-30
  • VG-40
viscosity grade bitumen -what are the types and their requirements
viscosity grade bitumen -what are the types and their requirements

What are the Requirements of Paving Bitumen (VG Bitumen)

Characteristics

Paving Grades or Viscosity Grade Bitumen Requirements

VG-10

VG-20

VG-30

VG-40

Absolute viscosity at 600C, Poises, Min

800

1600

2400

3200

Kinematic viscosity at 1350C, cSt, Min

250

300

350

400

Flash point, (cleveland opencup), 0C, Min

220

220

220

220

Solubility in trichloroethylene, %, min

99.0

99.0

99.0

99.0

Penetration at 250C

80-100

60-80

50-70

40-60

Softening point, 0C, Min

40

45

47

50

Tests on residue from thin film oven test/RTFOT
  1. Viscosity ratio at 600C, Max

4.0

4.0

4.0

4.0

  1. Ductility at 250C, cm, Min, after thin film oven test

75

50

40

25

 

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