Penetration grade bitumen 80/100


Penetration grade bitumen 80/100

Penetration grade bitumen 80/100 is used for manufacturing of hot mix asphalt for bases and wearing courses.

There exist eight type of penetration grade bitumen including 30/40, 40/50, 50/70, 60/70, 70/100, 80/100, 85/100 and 100/120.

Among all types of this penetration grade bitumen, Bitumen 80/100 is a soft bitumen which is suitable for cold climates.

If you require to find out more interesting information about bitumen 80/100, this article can help you.

You can also read about other types of bitumen that can be used in bases and wearing courses of a road in this article.

Bitumen grade 80/100 meaning

Bitumen of grade 80/100 means that in the bitumen penetration test, when the needle sinks 8 to 10 mm in the bitumen, we find out that the penetration value is between 8 and 10 mm and this type of bitumen is 80/100 bitumen.

According to the numbers in the penetration grades, we can observe the depth of the needle penetration in the bitumen.

Bitumen penetration Grade 80/100 usage

The main usage of bitumen penetration grade 80/100 is in road making at cold regions.

Since the penetration grade bitumen 80/100 is a soft bitumen, it is more suitable for soils with high particle density such as clay. Because they have a smaller size and the bitumen 80/100, as a soft bitumen, can easily penetrate them.

On the other hand, high penetration graded bitumen works better for soils with low particle density.

Comparison of penetration grade 80/100 and VG10          

Since the VG10 bitumen is the softest grade of viscosity bitumen and it is widely used for spraying applications and surface coating, it has been a suitable substitute for penetration grade 80/100.

Penetration grade bitumen 80/100 is suitable for the temperature of 25 to 70 degree, while vg-10 bitumen can be used in the temperature range of 25 to 135 degrees. So it is obvious that VG10 can be more reliable than bitumen 80/100 in different weather.

Both of these bitumen are appropriate for hot chip seals applications and hot mix asphalts to be used in cold climates.

Comparison of Bitumen 80/100 vs 60/70

The difference between 80/100 and 60/70 penetration grade is the penetration range.

Bitumen 60/70 has lower penetration which means it is harder than bitumen 80/100.

To the contrary of bitumen 80/100, Bitumen 60/70 is suitable to be used in hot climates and it shows more durability exposing to heavy traffic loads.

Bitumen 80/100 standard

All over the world, Penetration grade bitumen is manufactured by these standards:

  • ASTM D 946
  • AASHTO M 20

Some bitumen suppliers go beyond the tests specified in the above standards to verify bitumen products are safe to use. But generally speaking, the most common methods to determine the penetration and softening point of bitumen are penetration test and softening point test, which are included in all standards.

Penetration Test

According to ASTM D5, in this test, a needle of specified dimensions is allowed to penetrate vertically into a sample of bitumen.

The penetration of the needle is calculated on the basis on 0.1 mm.

As mentioned above, in bitumen penetration 80/100, the needle sinks 8 to 10 mm into bitumen .

Usually the applied load of needle is 100 gr, the duration of loading 5 seconds and the test temperature 25 C.

A penetration value of bitumen is determined by averaging the three measurements taken separately. Soft bitumen requires longer needles and deeper cups to measure the penetration.

When the bitumen is soft, the penetration is more, the test result shows a larger number.

On the contrary, when the bitumen is hard, the penetration is less. For example, bitumen penetration 30/40 is the hardest which means that the needle sinks slightly into the bitumen, so the test result shows a smaller number.

The apparatus of penetration test is shown below.

The Infinity Galaxy penetration test apparatus


Softening Point Test

The softening point is another property commonly used to determine the consistency of a bitumen.

According to ASTM D36, in this test, a small steel ball is placed on a sample of bitumen contained in a brass ring, and the set-up is then suspended in a bath containing water or glycerin.

The bath temperature is raised at 5 C per minute, and the bitumen softens and eventually deforms slowly with the ball through the ring.

The softening point temperature is the temperature indicated by the thermometer at the moment that the ball touches the bottom plate below the ring.

In the following, you can see the apparatus of softening point test.

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The softening point test apparatus


Bitumen grade 80/100 Specification

To choose a suitable bitumen to meet your requirement, it is necessary to know the exact specification of the bitumen. The bitumen 80/100 specification is as below. As you see, one of the factors in this table is specific gravity. Specific gravity determines the density of the bitumen. According to the ASTM D70, the density of bitumen 80/100 in kg/m3 is equal to 1009.6.

Specification of Infinity Galaxy Bitumen Penetration Grade 80/100
Specific Gravity at 25°CASTM D70°C1.011.05
Penetration at 25°C, 100g, 5sASTM D5mm80100
Softening PointASTM D36°C4252
Ductility at 25°CASTM D113Cm100 
Loss on heatingASTM D6% 0.5
Flash pointASTM D92°C225 
Solubility in TrichloroethyleneASTM D2042%99 



Infinity Galaxy Company ensures that its bitumen penetration grade 80/100 has a high quality.

The inspection by international inspectors is carried out during loading to the ship and the quality control of the sample is made before shipping.

This bitumen supplier guarantees quality to ASTM standards. Infinity Galaxy is among the most active companies in the exportation of petroleum products such as bitumen.

Our company strives to deliver the oil products to the different countries on time. If you want to know more about the product you need, just contact us or fill out the below form.