Bitumen VG 40
Viscosity Grade Bitumen (Asphalt) is a Bitumen grade mostly use as a Paving Grade. And it’s suitable for road construction and for the asphalt pavements producing with premier attributes. Also VG Bitumen usually use in the production of hot mix asphalt.
Viscosity Grade Bitumen is petroleum grade bitumen. Also Which produce from fractional vacuum bottom which comes from distillation of crude oil. Which feasible appliance and behavior changes according to its temperature.
Viscosity Grade bitumen specify 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) measure at 60 ºC (140 ºF).
- RTFOT Viscosity Grade Bitumen (AR-Grades), in which the Viscosity of bitumen (asphalt) measure at 60 °C (140 °F) after the roll on thin film oven test.
Viscosity grade bitumen has a thermoplastic feature which causes the material to soften at high temperatures. And to harden at lower temperatures. How ever this temperature viscosity relevance is significant when specifying the performance parameters such as the adhesion, rheology, durability and application temperatures of bitumen. In the Viscosity Grade Bitumen specifications, the most important emphasizes is based on the Bitumen ductility.
Viscosity Grade 40 Bitumen Uses
VG-40 can use in highly stressed areas such as intersections, near toll booths and truck parking lots instead of 30/40 penetration grade. Because of higher viscosity, stiffer Bitumen mixes can produce to amend resistance to shoving and other problems related to higher temperature and heavy traffic loads.
Globally Bitumen has the capability to supply customers a wide range of Iran Bitumen viscosity grades such as VG 10, VG 20, VG 30, VG 40.