🌀 Qirguni can be considered a traditional example of Izogam. The insulation used in Qirguni is also bitumen isogam. Gunny has the role of stabilization in this method, which in Isogam has given its place to synthetic fibers and other layers mentioned above.
The bitumen is categorized from the point of view of the number of layers and is usually prepared with these layers:
🔻🔺 Qirguni, three layers of bitumen and two layers of sacking 🔻🔺 Two layers of bitumen and one layer of sacking 🔻🔺 Three layers of bitumen with a first grade sack
Types of bitumen isogam
This type of bitumen is naturally present in the shallow layers of the earth's crust and in some places it protrudes from the soil of the earth's crust and caused the discovery of natural bitumen through Humans have become.
Petroleum bitumen:
In the first refinery, crude oil is heated in the furnace under ambient pressure at a temperature of 300 to 350 degrees before entering the tower. The input feed to the tower is partly liquid and partly steam, the liquid part of which is called oil bitumen.
Tar bitumen:
This type of bitumen is different from oil bitumen in terms of chemical composition and physical properties, because the source of these two types of bitumen is different from each other.
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