As various studies and experiments on bitumens produced in the country show, it can be said that these bitumens do not have unacceptable fluctuations and changes in the degree of their degree of penetration parameter, and generally this parameter is within the standard range for these bitumens. Therefore, bitumens produced in the country’s refineries can be placed in two standard categories: 60.70 and 85/100. Research shows that 70.60 bitumen produced in Iranian refineries with a penetration grade of 64.7 is equivalent to PG64-22 bitumen in the SHRP classification and 100.85 bitumen produced in Iranian refineries with a penetration grade of 95 R is equivalent to PG58-22 in It will have a SHRP rating. For more information on Exporting Countries for bitumen in recent years, visit our website.
How many types of bitumen are there?
Types of bitumen:
There are two main types of bitumen used in road construction. If it is obtained from the mine, it is called natural or mineral bitumen, and if it is obtained from the refining of crude oil, it is called petroleum bitumen.
1) – Natural bitumen:
When deep-earth crude volatiles evaporate overtime against atmospheric agents, a black substance called natural bitumen remains. Natural bitumen includes lake bitumen and rock bitumen.
A) Lake bitumens:
When crude oil naturally ascends through the failed layers of the earth and its material evaporates, natural bitumens form in the form of lakes on the ground. Up to 15 million cubic meters.
B) Bitumen stones:
Bitumens are mainly limestone and sandstones into which crude oil has penetrated and over time its volatiles have evaporated and bitumen remains in these rocks. The amount of bitumen in these stones varies from 7 to 80%.
C) Gilsonites:
Gilsonite is a natural hydrocarbon resin found in the Bonita River in northeastern Utah. This natural asphalt has hardened like a crude oil asphalt. Usually the names asphalt, euthanate and asphaltum are also used for this material. Gilsonite, like natural asphalt, is soluble in aliphatic and aromatic solvents.
Gilsonite in lumpy state is a glossy, black substance very similar to obsidian, and very brittle, and in micronized powder form it has a dark brown color. Gilsonite is found in vertical layers below the earth’s surface.
2) – Petroleum bitumen:
In the early twentieth century, petroleum bitumen from crude oil refining came on the market and replaced mineral and natural bitumen in asphalt pavements and other industrial uses. This type of bitumen is obtained by refining crude oil in distillation towers and finally remains at the bottom of the tower at a temperature of more than 380 degrees.
Types of petroleum bitumen:
A) Pure bitumen:
During the crude oil distillation, the lighter oils evaporate at lower temperatures and the heavier oils separate as the temperature rises. What remains at the bottom of these towers is pure bitumen, which by adjusting the temperature and pressure inside the distillation tower, bitumens with different degrees of hardness can be obtained.
B) blown bitumen:
Blowed bitumens are obtained by blowing hot air into pure bitumen in the final stage of purification. Pure bitumen, which is in a liquid state and at a high temperature, enters a special chamber and is blown from the bottom of this chamber by means of perforated air pipes. This operation is usually done at a temperature between 200 and 300 degrees Celsius. And bitumen finds the desired properties. For more information about bitumen price list 2020, please visit our official site.
Main exporting countries for bitumen in 2020
The bitumen company PG6422 and PG6410 perform almost the same function as 6070 bitumen. The meaning of PG front numbers like 6422 is that it, bitumen from -22 to +64 degrees Celsius has good performance. PG bitumen conversion is the same as 6070 bitumen conversion, but if the bitumen used is PG5822, it will have the same function as 85100 bitumen and will be a little looser and will be suitable for climates such as Tabriz and Urmia. Dear customers, you can visit our company website for more information about Main exporting countries for bitumen in 2020.
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