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VG bitumen categorized according to Viscosity (degree of fluidity) grading. Furthermore viscosity tests conducted at 60°C & 135°C. It shows road surface temperature during summer and mixing temperature. Penetration at 25°C, also retained in Specs.
VG-BITUMEN:
VG-10 is widely used in spraying applications such as surface-dressing and paving in very cold climate in lieu of old 80/100 Penetration grade. It`s also uses in Bitumen Emulsion and Modified Bitumen.
VG-20 is used for paving in cold climate & high altitude regions
VG-30 is primarily used to construct extra heavy duty Bitumen pavements that need to endure substantial traffic loads. Also it can be used in lieu of Bitumen 60/70.
VG-40 is used in highly stressed areas such as intersections, near toll booths and truck parking lots in lieu of old 30/40 Penetration grade. Due to its higher viscosity, stiffer Bitumen mixes can produced to improve resistance to shoving and other problems associated with higher temperature and heavy traffic loads.
