viscosity grade

Viscosity grade bitumen

Viscosity Grade bitumen or VG:

Viscosity grade bitumen is a fundamental property that determines how the material behaves at a certain temperature or a temperature range. The main unit of viscosity is pascal’s second (Pa s). The absolute viscosity or bitumen dynamics measured in pascal seconds is the shear stress applied to the sample in pascals divided by the shear rate per second (1 Pa = 10 Poise). The absolute viscosity of bitumen can be measured by a sliding plate viscometer. For many purposes, it is common to determine bitumen viscosity by measuring the time required for a given amount of material to pass through a standard orifice. These methods are suitable for determining and comparing; if needed, the results can be converted to more fundamental viscosity units.

Applications for viscosity bitumens:

The viscosity class of bitumens is called a grade of refinery bitumen obtained from the vacuum aeration of the distillation tower and divided according to their viscosity. The most common use of this type of bitumen is in road construction, insulation, building construction, and
liquid bitumen production. In terms of place of use, VG30 bitumen is more suitable for temperate climates.

Classification for Viscosity grade bitumen:

viscosity grade test is measured at 60 and 135, which is the the temperature of the road surface in summer and the temperature of mixing asphalt, respectively. The degree of penetration at a temperature of 25 degrees, which is the the average annual temperature of the asphalt coating is also specified in the specifications of this bitumen standard. The category of viscosity grade of bitumen is classified based on the
viscosity test results. This category of bitumen, which has many uses in hot areas, will soon replace penetrating bitumen

Different types of viscosity grade bitumens:

The viscosity grade of bitumen is a kind of standard bitumen that is suitable for paving stone, road construction, and asphalt production with special characteristics. Due to its elastic properties, it is used for very strong and flexible connections. As a producer and supplier of different viscosity grades of bitumen, Grandpetroleum Company is ready to cooperate and provide your requests for sale in the domestic and foreign markets (exports).

Note: AC bitumen is Asphalt cement solid whose abbreviation is AC, AC
bitumen is obtained from the distillation of crude oil.

  • Bitumen AC-2.5

Bitumen AC-2.5 is asphalt cement with a viscosity of 250 poises at 60c. viscosity grade of bitumen AC-2.5 is the softest grade among all of
the bitumens. Bitumen AC-2.5 is known to the low viscosity, soft bitumen mixtures can’t be produced to improve resistance to displacement and other problems associated with high temperatures and heavy traffic loads.

  • Bitumen AC-5

Bitumen AC5 is a kind of bituminous asphalt, because of its low viscosity this grade of bitumen is mostly used in cold regions. This asphalt is suitable for cold countries like Canada. The temperatures of storage for AC5 are preferred at 135°C to 163°C. High temperatures can increase hardening and heating costs. Bitumen AC5 is suitable to be used for road construction in cold climates. Also, Bitumen AC5 is suitable for manufacturing asphalt mixes, emulsion for some grades of bitumen, modified bitumen, and cut-
back bitumen.


Grandpetroleum Company Bitumen Penetration Grade AC 5 is available
stainless steel barrels


Grandpetroleum Company is ready to cooperate and provide your
requests for sale in the domestic and foreign markets (exports).
For more information, please call ( ) or send via message ( ).

  • Bitumen AC-10

Bitumen AC10 is the result of the heaviest cut of crude oil. The most common application of this elastic compound is related to the
the construction industry, the production of moisture insulation, the production of some chemical compounds and most importantly, the road construction industry. Also, the combination of bitumen AC10 with sand is called asphalt to repair, renovate, and establish roads. Intra-city and inter-city routes are used.

  • Bitumen AC-20

Bitumen AC20 is been categorized according to Viscosity (degree of fluidity) grading. In other words, The higher the grade, the stiffer the
Bitumen AC20is a kind of standard bitumen that is suitable for paving stone, road construction, and asphalt production with special
characteristics. Due to its elastic properties, it is used for very strong and flexible connections.

  • Bitumen AC-30

Bitumen AC 30 is a grade of Viscosity for Bitumen that this Viscosity of the standard bitumen (asphalt) is measured at 60 degrees. The main
usage of bitumen AC 30 is in road making in hot temperate regions. The applications of bitumen AC 30 are suitable for road construction
projects in warm & dry regions. Also, it can be useful for producing some kind of asphalt primer. Bitumen AC 30 is used in road construction, surfacing, and some industrial applications and manufacture asphalt mixes, bitumen emulsion, cut-back bitumen, and modified bitumen.

  • Bitumen AC-40

Bitumen AC40 is suitable for the construction of sidewalks and asphalt in tropical areas such as tropical belts in India or even in the south of
our country, Iran; It should be considered when buying bitumen. Since bitumen AC40 has high stability in hot weather, it has received special attention for the repair or construction of roads and sidewalks in tropical areas where the average air temperature is high.
Also, the versatility of Bitumen AC40 to be used in hot mix asphalt has made the demand for this product and the purch

Table of specification of pure bitumen based on viscosity at 60 C

Table of specification of pure bitumen based on viscosity at 60 C

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