Bitumen Grade 40/50

Viscosity Grade Bitumen (Asphalt) is a Bitumen grade mostly used as a Paving Grade and it’s suitable for road construction and for the asphalt pavements producing with premier attributes. VG Bitumen is usually used in the production of hot mix asphalt. Viscosity Grade Bitumen is petroleum grade bitumen, which produced from fractional vacuum bottom which comes from distillation of crude oil, which feasible appliance and behavior changes according to its temperature.

Viscosity Grade bitumen is specified by ASTM Standard D3381-09 and AASHTO M226-80 (2008). VG Bitumen specifications cover by Viscosity at 60 ̊C (140 °F).

We have two methods of grading:

  • Standard Viscosity Grade Bitumen (AC-Grades), in which the Viscosity of the standard bitumen (asphalt) is measured at 60 ºC (140 ºF). RTFOT Viscosity Grade Bitumen (AR-Grades), in which the Viscosity of bitumen (asphalt) is measured at 60 °C (140 °F) after the roll on thin film oven test.
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Description

Bitumen grade 40/50 Specifications

Analysis Unit Limit Test Method
Density@25°C Kg/m³ 1010-1060 ASTM D70 or D3289
Penetration@25°C mm/10 40-50 ASTM D5
Softening Point °C 52-60 ASTM D36
Ductility@25°C cm 100min ASTM D113
Loss on Heating wt% 0.2max ASTM D6
Drop in Penteration after Heating % 20max ASTM D5
Flash Point °C 232min ASTM D92
Solubility in Trichloroethylene wt% 99.0min ASTM D2042
Spot Test — Negative A.A.S.H.O.T.102
Viscosity@60°C P 4000±800 ASTM D2171
Viscosity@135°C cSt 400min ASTM D2170

TEST ON RESIDUE FROM THIN FILM OVEN TEST ( ASTMD1754)

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