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IS 73:2013

The Bureau of Indian Standards (BIS) introduced paving grade bitumen specifications (IS:73-1950) for the first time in the year 1950 and classified it on penetration. The specifications were revised in the years 1962 and 1992. To improve the quality of Bitumen, BIS revised IS:73-1992 specifications based on Viscosity at more practical temperature in July 2006. As per these specifications, there are four grades VG-10, VG-20, VG-30 & VG-40. Fouman Chimie Gostar is capable to produce the following grades:

  • VG-10:

This grade is widely used in spraying applications such as surface dressing and paving in very cold climate instead of 85-100 penetration grade. It is also used to manufacture Bitumen Emulsion and Modified bitumen products.

Characteristic

VG 10

Test Method

Absolute Viscosity@ 60 °C  (Poise)

800 ~ 1200

BIS 1206-2

Kinematic Viscosity@ 135 °C  (cSt)

250 min

BIS 1206-3

Penetration @ 25 °C  (dmm)

80 min

BIS 1203

Softening Point (°C)

40 min

BIS 1205

Solubility in trichloroethylene (%wt)

99 min

BIS 1206

Specific Gravity@ 27 °C/27 °C

0.99 min

BIS 1202

Flash Point (°C)

220 min

BIS 1209

Test on Residue from TFOT/RTFOT

Viscosity ratio @ 60 °C

4 max

BIS 1206-2

Ductility @ 25 °C  (cm)

75min

BIS 1208



  • VG-30:

This grade is primarily used to construct extra heavy duty bitumen pavements that need to endure substantial traffic loads. It can be used as 60-70 penetration grade.

Characteristic

VG 30

Test Method

Absolute Viscosity@ 60 °C (Poise)

2400 ~ 3600

BIS 1206-2

Kinematic Viscosity@ 135 °C  (cSt)

350 min

BIS 1206-3

Penetration @ 25 °C (dmm)

45 min

BIS 1203

Softening Point (°C)

47 min

BIS 1205

Solubility in trichloroethylene (%wt)

99 min

BIS 1206

Specific Gravity@ 27 °C /27 °C

0.99 min

BIS 1202

Flash Point (°C)

220 min

BIS 1209

Test on Residue from TFOT/RTFOT

Viscosity ratio @ 60 °C

4 max

BIS 1206-2

Ductility @ 25 °C (cm)

40min

BIS 1208


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