Iran high quality bitumen

Factors affecting bitumen chemistry

Long-term studies show that the presence of oxygen, ultraviolet rays and temperature changes affect bitumen, like other organic matter.

These external factors harden the bitumen and reduce the degree of penetration, increase the softening point and typically increase the penetration index (PI).

Recent research has shown that the hardening of bitumen and consequently the asphalt mixture made from it, is effective in road construction, because as the stiffness increases, the load distribution capacity of asphalt layers increases.

 This type of hardening is known as curing and is believed to increase the life of the asphalt coating.

 

In the case of the pavement layer, due to the contact of bitumen with environmental factors, hardening of bitumen has a destructive effect on the performance of bitumen and causes cracking.

 

 

 Causes of bitumen hardening:

 

 

oxidation

 

Evaporation of volatiles

 

Steric or physical factors

 

Leaking oils

 

Oxidation changes the chemical composition of bitumen.

Like other organic materials, bitumen oxidizes slowly in the presence of oxygen in the air.

 And increases the viscosity of bitumen.

 

Calcium hydroxide prevents asphalt from aging, but the reason for this inhibition has not yet been determined.

 In addition, calcium hydroxide is used to improve the adhesion properties of bitumen.

 Sodium hydroxide also prevents bitumen aging, but often has a negative effect on bitumen adhesion.

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Iran high quality bitumen

iran high quality bitumen

Petroleum bitumen is produced by refining crude oil at high temperatures and in a short time.

It is liquid at high temperatures and becomes viscous, pasty, and hard as the heat decreases. Excessive heating of the bitumen causes excessive evaporation of its mineral oils and reduces the adhesion of the bitumen.

 

 

Waxed bitumen is not suitable for making black surface because wax reduces the elasticity of bitumen and causes black surface to lose its springy state and become brittle.

The black surface shrinks in the cold and tensile stress is found in it. When this stress is greater than the tolerance of the frozen asphalt surface, the surface cracks.

The less petroleum paraffin, the closer it is to mineral bitumen and the more suitable it is for making the surface.

 In addition to paraffin, asphaltene, oxygen and mineral oils also affect the quality of bitumen. The heavier the crude oil, the more asphalt is extracted from it.

 Basically, light crude oil is less used for bitumen production due to the production of high-distillation materials, although bitumen production is related to various other parameters, which generally include refining knowledge and technology issues and economic issues.

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Iran high quality bitumen

Bitumen quality control tests

The bitumen used should be homogeneous and should not foam when heated to 176 degrees Celsius.

Oil or steam pipes or electrical appliances should be used to heat the bitumen. The monitoring device is obliged to prevent the evacuation of bitumen of tankers that use direct flame for heating, and the contractor must also refrain from evacuating the bitumen of such separate tanks.

The temperature of bitumen in tanks and pipes and when mixing with aggregates in the asphalt plant mixer should not exceed 175 degrees Celsius for pure bitumen.

Bitumen transport tanks as well as workshop bitumen tanks must be equipped with a thermometer. One thermometer is installed at the bottom of the tanker and another at the top. In the asphalt factory, a thermometer for bitumen must be installed so that the temperature of the bitumen can be controlled at any time.

Bitumen is stored in metal tanks and concrete pools in the workshop.

If the pool is used, the floor and walls should be concrete and the roof should be covered so that the bitumen is completely protected from dust, rain and other contaminants. Bitumen heating equipment should be provided on the pool floor.

 

 The bitumen required for each stage of asphalt production should not last more than 15 seconds after the start of the bitumen discharge process.

Bitumen measuring instruments must measure the required bitumen that is emptied at each stage to the nearest 1 kg.

 To quickly identify the basic properties of bitumen, some penetration-based grading tests are used. Stain testing is also used for this purpose.

 

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Iran high quality bitumen

 

Jey Oil Company produces one of the highest quality bitumen in the world.

Jey Oil Company is the representative of the Islamic Republic of Iran and we are obliged to produce the best quality products and provide them to our customers.

 

High quality of bitumen in Iran due to crude oil which is used as a raw material in the production of this product.

Iran's crude oil is heavy, super-heavy and high in sulfur.

The sulfur in crude oil increases the quality of bitumen.

The use of quality bitumen in road asphalt can severely prevent damage to vehicles, the environment, as well as road damage and casualties.

In line with the quality of its products, Jey Oil Company has succeeded in obtaining certificates

ISO / IEC17025 2012, ISO9001 2008,

ISO / TS29001 2010, ISO14001 2004, ISO10015 1999,

BS-OHSAS18001 2007

The national standard of Iran is ISIRI.

 

 

 

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Bitumen Types

Natural Bitumen: This bitumen is extracted from mines, which are used in many industries, including road construction, the paint industry, polish and insulation of tanks and tubes and molding
Coal Tar: Coal tar is a black or dark-brown a residue produced by the heat treatment of coal. It is a solid at room temperature
Petroleum Bitumen: Mixture of hydrocarbons derived from petroleum. Black or brown, it varies from viscous to solid ، producing by air blowing process vacuum bottom (crude oil derivatives)

 

Click to see the types of bitumen in Iran that are produced by Jey Oil Refining CO

Bitumen Application

Road: 90 percent of the bitumen is used in the construction and maintenance of roads
Roofing: 10 percent of the bitumen is used in the roofing and other (canals and tunnels, pipe coating)

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Chemical of bitumen

 

 

 

 

 

 

 

 

 

 

 

 

 

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Bitumen Production Process

Process by which compressed air is blown into vacuum bottom residue, typically at 230–260 °C in a reactor. This process results in complex reactions (such as Dehydrogenation، Polymerization، Oxidation). different grades for suited applications produced Due to ratio of air blowing

 

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