Paving Grade Bitumen


Paving (Viscosity) Grade bitumen is manufactured from crude oil and can be retrieved as a residue from crude oil. It has thermoplastic feature and is segregated into different grades depending on its hardness on fluctuating temperature. The BIS (Bureau of Indian standards) distinguishes paving grade bitumen as per their viscosity. The viscosity grade bitumen obtained from the refineries is processed in a highly modernised plant through the exothermic reaction, to the relevant time limit to produce the desired Paving Grades as per the various specifications. Viscosity Grade bitumen is designed to take care of lowest temperature (responsible for cracking) and maximum temperature (responsible for rutting). The important use of this bitumen is due to the existence of two important properties which are water impermeability and high adhesion.


Paving Grade Bitumen is mostly used for construction of roads, helipads, highways, runways and allied fields. It is also used to manufacture asphalt pavements containing the finest properties.


Viscosity Grade Bitumen is determined by IS 73, ASTM and AASHTO. According to the IS, grading of Bitumen was changed from penetration grade to viscosity grade in 2006.

VG-10 Bitumen

VG 10 bitumen is the softest grade of viscosity bitumen. This type of bitumen is widely used for spraying applications and surface coating. VG 10 bitumen means that your bitumen is also suitable for paving roads in a very cold climate instead of the old 80/100 penetration grade. The air temperature that matches VG10 bitumen ranges from -10 ◦C to 25 ◦C. Due to the high temperatures in hot climatic zones, the application of VG10 cannot provide desirable rutting resistance. This type of bitumen is also used to manufacture bitumen emulsions and modified bitumen products especially in India. As a viscosity grade bitumen, VG10 has a better performance in cold weather.This product is very often used as a spray application like surface dressing, also used in road construction in fewer temperatures as an alternative to 80/100 bitumen grade. A lot of bituminous products can be produced using VG-10 like Bitumen Emulsion.

Advantages in the Application of Viscosity Grade 10 Bitumen

  • It is suitable for temperature under 30 C
  • Its absolute viscosity is 800
  • It has a higher Penetration Value in comparison to VG30 and VG40
1 Penetration at 250C, 100g 55, 0.1 mm, min 80
2 Absolute Viscosity @600C, Poise 800-1200
3 Kinematic Viscosity @1350C, cSt, min 250
4 Flash Point ( Cleveland Open Cup), OC, min 220
5 Solubility in Trichloroethylene, % mint 99
6 Softening Point (R&B), OC, min 40
7 Tests on Residue from Rolling Thin Flim Over Test
8 Viscosity Ratio @600C, max 4
9 Ductility @250C, cm, min 75

VG-30 Bitumen

VG-30 Bitumen is primarily used for the construction of extra-heavy bitumen pavements that have to bear significant traffic loads. Bitumen VG30 is the most widely used type of bitumen in road construction, insulation, building construction industries, and also in the production of cutback bitumen. It is a popular grade of bitumen in India. Indian importers prefer this type of bitumen because its performance in Indian road construction is proven. VG 30 grade bitumen is also used for plastic roads in India. Because of having good thermal susceptibility, we use VG30 in areas that have a higher temperature. VG-30 bitumen is also suitable for use in hot and rainy weatherconditions instead of bitumen penetration grades. The more viscous the bitumen, the fewer the chance of being affected by water. It can be used as a replacement of 60/70 penetration grade bitumen.

Advantages in the Application of Viscosity Grade 30 Bitumen

  • It is suitable for temperature above 30 C
  • For a clayey soil, bitumen with higher viscosity is more suitable
  • VG 30 is more suitable for road construction in a rainy weather
1 Absolute viscosity, 60°C Poise 2400-3600
2 Kinematic viscosity, 135°C cSt 350
3 Flashpoint, min, °C °C 220
4 Softening point, Min, °C °C 47

VG-40 Bitumen

VG 40 bitumen is used in areas in which high pressure comes from heavy traffic loads, such as intersections, near tolls booths, and truck parking lots.

Due to the high viscosity of this bitumen, it is more appropriate for improving resistance to shoving and other problems associated with higher temperatures and heavy traffic loads. For many years industries have switched to VG 40 instead of the penetration grade bitumen 40/50.

Advantages in the Application of Viscosity Grade 40 Bitumen

  • It is suitable for a temperature above 40 C
  • Its absolute viscosity is 3200
  • It is a preferred type of bitumen when heavy traffic load is expected

Mittal Siddhi Infra Pvt. Ltd. is a prominent importer and supplier of Viscosity Grade Bitumen and different types of bitumen and petrochemical products based on international standards. We provide bitumen on an immediate basis and in bulk quantity for our Indian customers since the most usage of bitumen is in India’s roads.

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