Bitumen Asphalt production

Bitumen Asphalt Production:

Material with a boiling point greater than around 500 °C we consider asphalt. Vacuum distillation separates it from other components in crude oil. The resulting material is typically further treated to extract small but valuable amounts of lubricants and to adjust the properties of the material to suit applications. In a de-asphalting unit, the crude asphalt is treated with either propane or butane in a supercritical phase to extract the lighter molecules, which are then separated. Further processing is possible by “blowing” the product: namely reacting it with oxygen. This step makes the product harder and more viscous.

we store Asphalt and transported at 150 °C. Sometimes diesel oil or kerosene we mixed in before shipping to retain liquidity. So before delivery, they must separate these out of mixture. This mixture we often call “bitumen feedstock” BFS.
The backs of tippers carrying asphalt, as well as some handling equipment, are also commonly sprayed with a releasing agent before filling to aid release. Because of environmental concerns Diesel oil not uses as a release agent.

Oil sands:

Naturally occurring crude bitumen impregnated in sedimentary rock is the prime feed stock for petroleum production from “oil sands”, currently under development in Alberta, Canada. Canada has most of the world’s supply of natural bitumen, covering 140,000 square kilometres, giving it second-largest proven oil reserves in the world. The Athabasca oil sands are the largest bitumen deposit in Canada and the only one accessible to surface mining, although recent technological breakthroughs have resulted in deeper deposits becoming producible by in situ methods.

Because of oil price increases after 2003, producing bitumen became highly profitable, but as a result of the decline after 2014 it became uneconomic to build new plants again. By 2014, Canadian crude bitumen production averaged about 2.3 million barrels (370,000 m3) per day and they projected to rise to 4.4 million barrels (700,000 m3) per day by 2020. The total amount of crude bitumen in Alberta that they could extract and they estimate to be about 310 billion barrels (50×109 m3), which at a rate of 4,400,000 barrels per day (700,000 m3/d) would last about 200 years.

Alternatives and bioasphalt:

Although un-competitive economically, asphalt can be made from non-petroleum-based renewable resources. Also can made from waste material by fractional distillation of used motor oil. That may cause premature cracking in colder climates, resulting in roads that need to be repaved more frequently.


Nonpetroleum-based asphalt binders we can made light-colored. Lighter-colored roads absorb less heat from solar radiation, reducing their contribution to the urban heat island effect. Parking lots that use asphalt alternatives are called green parking lots.

Albanian deposits
Selenizza is a naturally occurring solid hydrocarbon bitumen found in native deposits in Selenice, in Albania. The bitumen that we found in the form of veins, filling cracks in a more or less horizontal direction. Bitumen content varies from 83% to 92%, with penetration near to zero and

120 °C softening point. The insoluble matter, consisting mainly of silica ore, ranges from 8% to 17%.

Today mines exploited in open pit quarry. Many underground mines still remain viable. Selenizza produced in granular form, after melting bitumen pieces selected in mine.



Oxidized Bitumen

Oxidized Bitumen is blown asphalt which is exporting in various grades as Blown bitumen 115/15, Oxidized-Bitumen 90/40,75/25, 85/25, 90/15, 105/35, 150/5 95/25 and any other grade will produce according to order.

pub-ltd is a dynamic and multi-faceted limited company actively involved in manufacturing procurement distribution and export of various grades of oxidized bitumen. We are structured into focused on oxidization of Bitumen division to serve the different needs of our customers worldwide.

We have a long history of supplying Oxidized Bitumen to bitumen factories, asphalt companies, roof insulation companies and membrane sheet manufacturer

There is more than 7 types bitumen. Their providing depend on the type of weather conditions.  Oxidized-Bitumen or blown bitumen is one of them.

Hard asphalt grades are suitable for sealing saw cuts and joints where there is expected to be the minimum amount of moving in the joint. Their wide temperature range prevents bleeding in high temperature applications. Oxidized-bitumen can also be used in industrial applications like roofing, flooring, mastics, pipe coatings, electrical uses.


What`s Oxidized-Bitumen?

Some of main advantages of Oxidized-Bitumen are that it`s completely water resistant, highly flexible and durable. In addition, chemically it`s very stable. Hard Bitumen is a very flexible compound also a very durable compound. Lastly, Oxidized Bitumen has some very prominent technical advantages that makes it a very sought after compound in various uses.

It produced by passing air thru soft bitumen penetration under controlled temperature states. British Standard grades (BS 3690) normally designated by two numbers representing mid-points of softening point and penetration ranges. Bitumen used in many  industries including roofing, flooring, pipe-coating etc.

Oxidized-Bitumen also known as hard bitumen, hard asphalt, blown bitumen, bitumen oxide and blown asphalt in industry. blown asphalt is grading in various degrees. The most popular grades of this product includes bitumen oxide 115/15, oxidized bitumen 90/10 also blown bitumen 90/15


 How to produce Oxidized-Bitumen (Blown Bitumen)?

 Production process:

  1. Bitumen heating to 265-270 °C
  2. Transferring melted bitumen to blowing towers
  3. Blowing air to bitumen
  4. Cooling melted bitumen with water
  5. Packing

The procedures of producing bitumen are as follows:

  1. Continuous blowing procedure
  2. Discontinuous blowing procedure

These two procedures are done by other two procedures named catalysis and anticatalysis .

Catalysis means adding some chemical material during the process In order to decrease blowing reaction time.

For the following reasons:

Ease and simplicity in changing blowing condition and have production with different grades as a result.

In generating unit.

Technology and also low expense in investment.

Uninterrupted production

Technical point and operating conditions are as follows:

Admixture of air and  volume of blowing air is two important variants in blowing process.  In bitumen producing plant, bitumen 60/70 is usually got by blowing. To making bitumen 90/15 or 85/25 distilled used oil or crude oil should be injected to product according to 20-25 % otherwise  fragility in bitumen lead to inferior production.

Increasing the heating temperature, air injection amount, time and tower pressure increase speed of production process reaction. Fine production temperature is 265-270°C. It should be under control. At 288°C reaction gravity becomes fast and incontrollable. It may cause to explosion in tower.

Bitumen should deliver to drum or tanker after providing because standing bitumen in tower is not in favor of system

when liquid surface in tower get low, Add to system should not be more than particular limit. Because extra air gather in empty parts lead to ignition nearly. Keeping high temperature inside tower causes explosion and en-damage system. Air injection done in 190-232°C. The final point of blowing is specified by sampling and testing of bitumen properties. Finally, product temperature should  kept 150- 165 °C for loading and packing capability.


The production process is as follows:

The producing operation of oxidised asphalt mainly includes tank loading different steps, bitumen blowing, condenser external gases and packing. Firstly loose bitumen shipped to tanker. By increasing bitumen value, blowing also increases so it may overflow because blowing tower filled up to 70 %.

Air injection usually done when temperature reachs to 190-230 °C.

Blowing operation:

Bitumen dispread monotonously in phase via nozzel For gradual heating also pipes filling with the air enteres from top  and bottom of tower . In oxidation process light molecule, volatile gases and steam emitted from top of tower.

Blowing  we do in 215-290°C but the suitable temperature is 265 – 270°C. Blowing should done from bottom of blowing tanker. Bitumen and air reaction is calorific . controlling the reaction temperature is by water injection.

Blowing end point:

Blowing end point is usually signified by sampling from tower and bitumen properties testing. The blowing operation stops when oxidized bitumen reaches to specified properties. After this in order to fix the final point and depolymerization bitumen got in high temperature.

Produced gas and steam entered the condansor through pipe fixed at top of blowing tower, includes smelling gases, oily and volatile parts. Then transfer to sewage tend with water. Other gas  parts emittes from top of condenser. Then transfer to furnace and burned there. After cooling, blowing oven and reaching to 150-160°C. In addition all blowing content oven which is hard bitumen. It`s able to loading and packing. Because of liquid height in blowing tower, it transferred by specific gravity. There is no need to use pump. It packes in carton, Kraft and poly bags. For fast operation (preventing from cooling & hardening) in every section several taps are fixed so that it can fill specific drum and carton with bitumen in same time.

Blown asphalt packing:

pub-ltd is manufacturer of all blown asphalt`s all grades. There is varius kind of packing for hard asphalt:
Blown asphalt packed in 25 or 50kg meltable polyamide bag. The melting temperature of the bag is 160~180C. Blown asphalt packed in 25 or 50Kg Craft bag. The size bags is 90x40cm. It easily palletized 1 ton on wooden pallet.
Blown asphalt  also packed in carton mold. It is easy to handle and safe for shipment. in addition we are able to packe hard bitumen in Kraft bags with ability to palletize.


Blown Asphalt Grades specification:

Bitumen Oxide all grades TDS for download



Caustic Lye

What is Caustic Lye?

Mostly all caustic soda is generated by the electrolysis of sodium chloride solution using one of three cell types: mercury, diaphragm and membrane cells. The electrolysis process produces 2.25 tonnes of 50% Caustic Lye with each tonne of chlorine.

The primary salt raw material is common  in underground deposits which we bring to surface as a solution in pumped high pressure water supply.

Sodium hydroxide Liquid specification:

Caustic Lye uses:

NaOH Liquid is used primarily in the following areas: manufacturing industries including cotton, synthetics, plastics, textiles and soaps; organic and inorganic chemistry industries (in the manufacture of sodium compounds); the food industry; water treatment; the agricultural industry; etc.
It uses in paper industry, textiles, detergents, synthetics, explosives, dyes and petroleum products; in the processing of cotton textiles; and, in laundry, bleaching, oxidation, electroplating, and electrolyte removal. Other uses include absorbing acid gases such as carbon dioxide or sulfur dioxide.
NaOH is used as a raw material in the production of sodium hypochlorite, as well as in all types of textiles (finishing and dressing, obtaining cellulose fibers from the viscose process, etc.). It acts  as  surfactant and detergent  in paper and pulp, also oil and gas industries.

Caustic Lye Hazardous reactions:

Main safety concerns about lye are also common with most corrosives, such as their potential destructive effects on living tissues. It hearts skin, flesh, and the cornea.
Solutions containing lyes can cause chemical burns, eternal injuries, scarring and blindness also immediately upon contact. Furthermore, Lyes maybe fatal if swallowed. Ingestion can because esophageal stricture. In addition solvation of dry solid lyes is highly exothermic. It results, may cause additional burns or ignite flammables.

The rebound between sodium hydroxide and a few metals is also hazardous. Aluminium reacts with lyes to produce hydrogen gas. Since hydrogen is flammable, mixing a large quantity of a lye such as sodium hydroxide with aluminum in a closed container is dangerous—especially when the system is at a high temperature, which speeds up the reaction. In addition to aluminum, lyes may also react with magnesium, zinc, tin, chromium, brass or bronze—producing hydrogen gas.


Caustic Soda Flake

What is Caustic Soda Flake?

At room temperature, sodium hydroxide is a white crystalline odorless solid that absorbs moisture from the air. It is a manufactured substance. When dissolved in water or neutralized with acid it liberates substantial heat, which may be sufficient to ignite combustible materials. Sodium hydroxide is very corrosive. It generally uses as solid or 50% solution. Other common names include caustic soda and lye. Caustic Soda Flake is used in soap, rayon, paper, explosives, dyestuffs, and petroleum products. It used in processing cotton fabric, laundering and bleaching, metal cleaning.  Also processing, oxide coating, electroplating, and electrolytic extracting. It is commonly present in commercial drain and oven cleaners.

Caustic Soda Flake Grades:

Caustic soda can be found in liquid or solid form (Sodium Hydroxide flake, granules or micro-pearls.) Both forms have the same chemical formula and the same applications; therefore, they are interchangeable.Before working with caustic soda, it is important to use a surgical mask to avoid inhaling it. Latex or gardening-type gloves should also be used, as well as safety glasses.

NaOH Flake Grades specification:

caustic-soda-flake Grade 99.9% PDF for download  

caustic-soda-flake Grade 98% PDF for download

caustic soda flake

How to using Caustic Soda Flakes:

Water amount who used in a Pyrex-type flask should be cold, because the temperature will rise. Measure the caustic soda flake and add it to the water, taking care to do this neither too fast nor too slow. NaOH should be sprinkled because it will sink to the bottom quickly. Always add the soda to the water, never vice versa.
Using a Teflon-type spoon, stir slowly without shaking or whisking. A hard layer will form at the bottom and the solution will become cloudy. This is normal. Never use a shaker or blender for soda.
Let the solution stand for a few minutes, then continue stirring and gradually everything will dissolve and the solution will become clearer. The final state of the solution will always be clear.


Caustic Soda Flake

It should be prepared just before use at recommended temperature. It shouldn`t be to cool.  If it cools completely, it will absorb carbon dioxide from the surrounding environment and will form a layer of sodium carbonate that will cloud the solution.

Caustic Soda in water purification add directly to well water. By neutralizing acid water, it prevents the destruction of pipes and pumps during transportation to the refinery. So, adding Sodium Hydroxide in water purification, to acidic water reduces the acids in water.

Consequently, Caustic Soda prevent the corrosion of the pipes and water transport system. In conclusion this reduction in corrosion helps to neutralize hard constituents and prepares water for the next steps of purification.


Caustic Soda Flake

Caustic Soda uses:

Caustic soda flake , sodium hydroxide, mostly used by industry and chemical manufacturing companies. Some fields caustic soda use for :

  • Soaps and cleaners
  • Refineries Alumina
  • plastic wrap
  • Detergent
  • Water treatment
  • Textile processing
  • Oil refining
  • Metal processing

In addition, major users of caustic soda are the aluminum industry, pulp & paper and the chemical industry. Also main usage in water treatment and water purification, as cleaning agent, or a wide range of uses in chemical industry like starch production or for the desulphurization in the petrochemical industry.

Sodium hydroxide (NaOH) also is solution in water. Furthermore Caustic soda is a strong base with a wide range of applications in different industries. We produce caustic soda together with chlorine and hydrogen from the electrolysis of salt brine.


Bitumen Penetration 60-70

What is Bitumen Penetration 60-70?

The major Grade Bitumen is Bitumen Penetration 60-70 and It Generally uses for different usages. Penetration grading quantifies the following asphalt concrete characteristics:

Penetration depth of a 100 g needle 25° C (77° F)
Flash point temperature
Ductility at 25°C (77°F)
Solubility in trichloroethylene
Thin film oven test(accounts for the effects of short-term aging that occurs during mixing with hot aggregate)
Retained penetration
Ductility at 25° C (77° F)
In addition, Penetration grading’s basic assumption is that the less viscous the asphalt, the deeper the needle will penetrate.

Grading Bitumen Penetration 60-70:

How ever Penetration also specified by softening point and penetration test. Also Designation is by penetration range only. The Penetration Grade Bitumen have a thermoplastic property which causes the material to soften at high temperatures and to harden at lower temperatures. This temperature – viscosity relationship also is important when determining  performance parameters such as the adhesion,  durability and usage temperatures of bitumen.


Bitumen Penetration 60/70

Bitumen additives:

Non-parametric performance is important in determining the asphalt performance. Also, Bitumen additives known as promoters and enhancers main role of bitumen in the bitumen increased resistance against permanent deformation at high temperatures. How ever Asphalt modifiers, should not be have a negative effect on bitumen spec in different temperatures. How ever If the elastic and viscous bitumen consists of two parts consider increasing elastic component bitumen, a viscous component is reduced, and this will increase the dynamic stiffness pitch. also Bitumen additives also have been effective, economically and executive is acceptable, readily available and can be blended with bitumen.

Bitumen Penetration 60/70 Spec:

Bitumen Penetration 60-70

Product Test Data Sheet for Down Load:

Bitumen 60-70 PDF click for download



Blown Bitumen 115/15

About Blown Bitumen 115/15:

By passing air through Bitumen penetration 60/70, Oxidized bitumen grades like Blown Bitumen 115/15 are produced. This process gives bitumen more rubbery properties. Also they are harder bitumen. Hard bitumen under controlled temperature conditions. We widely use that as an anti-slip layer compound in piling industry, for manufacture of roofing felts, roofing and waterproofing industries, sound dampening felts and under carriage sealant in automotive industry, electric cable joint protection, joint filling compound, sealant compound and more. Also we use in sealing saw cuts and joints.

In addition we use that in manufacturing of bituminous marine mastic for oil & gas pipeline joints.
Oxidized bitumen is a very flexible compound that is not only chemically stable but also a very durable compound apart from being completely water resistant. It`s highly flexible and durable. Furthermore, it`s chemically very stable.
Lastly, Oxidized Bitumen has some very prominent technical advantages that makes it a very sought after compound in various uses.

Blown Bitumen 115/15 Test Data Sheet:

Oxidized Bitumen 115-15 TDS

Oxidized bitumen 115/15


Bitumen Emulsion

Bitumen Emulsion

Bitumen Emulsion have being developed and exponentially increased sinned they were created in 1900. Estimated presently at 20% of the global bitumen use, bitumen emulsions are basically an O/W – Oil on Water solution – A dispersion of bitumen particles on water, stabilized with the addiction of surfactants – Surface active agents – or we most commonly know them as emulsifiers, that will permit the bitumen to de diluted in water. They are primarily used for tack coats for use in between hot mix asphalt layers and prime coats for thin hot mix surfacing layers or a chip seal pavements.

Three Categories of Bitumen Emulsions:

  • Anionic with negatively charged globules

  • Cationic with positively charged globules

  • Non-ionic with neutral globules.

  • The main grades for bitumen emulsions are as follows:

  • Bitumen Emulsions
  • Cationic Emulsion Grade

  • Bitumen Emulsion is an area where technological progress is still being made to meet the requirements of pavement engineering. We first developed Anionic emulsions . They are currently less favored than the cationic emulsions, as cationic emulsions coat the aggregates more efficiently due to their positive load and have therefore better adhesion properties. We use Cationic Emulsion both more favored and more widely.

Emulsified Bitumen usually consists of bitumen droplets suspended in water. This dispersion under normal circumstances would not take place, since everyone knows that oil and water don’t mix, but if an emulsifying agent is added to the water the asphalt will remain dispersed. Most emulsion are used for surface treatments. Emulsions enable much lower application temperatures to be used. Application temperatures range from 45°C to 70°C. This is much lower than the 150 to 190°C used for hot mix asphalt cements. The lower application temperatures will not damage the asphalt and are much safer for field personnel.

Cationic Emulsion Grade Part 2

In the production of bitumen emulsion, water is treated with an emulsifying agent and other chemicals and is pumped to a colloid mill along with bitumen. The colloid mill breaks the bitumen up into tiny droplets. The emulsifying agent migrates to the asphalt-water interface and keeps the droplets from coalescing. then we pump The emulsion to a storage tank.

Bitumen emulsions are complicated and good chemistry we require to reach target desired emulsion properties. Variables in emulsion production include the base bitumen and the type and amount of emulsifying agent. There are two basic classifications of emulsions globally usually we use, anionic bitumen emulsions and cationic bitumen emulsions.

The type (chemistry) of the emulsifying agent we use, determines the designation. Emulsifying agents are the chemicals we use to stabilize the emulsion and keep the “billions and billions” of bitumen drops separated from one another. These compounds are large organic molecules that have two distinct parts to them. These parts we call the “head” and “tail.” The “head” portion consists of a group of atoms that chemically have positive and negative charge areas.

These two charged areas give rise to the head we call polar (as in poles of a magnet). Because of this polarity, and the nature of some of the atoms in this polar head, the head is soluble in water. The tail consists of a long chain organic group that is not soluble in water, but is soluble in other organic materials like oils (bitumen). Thus, an emulsifying agent is one molecule with both water-soluble and oil soluble portions. This unique characteristic gives the chemical its emulsifying ability.

Anionic Emulsions

The term anionic we derive from the migration of particles of bitumen under an electric field. The droplets migrate toward the anode (positive electrode), and hence the emulsion we call anionic. In an anionic emulsion, there are “billions and billions” of bitumen droplets with emulsifying agent at the water bitumen interface. The tail portion of the emulsifying agent aligns itself in the bitumen while the positive portion of the head floats around in the water leaving the rest of the head negatively charged and at the surface of the droplet.

This imparts a negative charge to all the droplets. Since negatives repel each other, all the droplets repel each other and remain as distinct bitumen drops in suspension. A typical anionic emulsifying agent we show below along with a diagram showing the orientation of the agent at the bitumen-water interface and the negative charge we imparted to each drop.

Typical Anionic Emulsifying Agent

Typical Anionic Emulsifying Agent

 Cationic Emulsions

The term cationic we derive from the migration of particles of bitumen under an electric field also. The droplets migrate toward the cathode (negative electrode), and hence the emulsion we call cationic. The cationic emulsifying agent functions similarly to the anionic; the negative portion of the head floats around in the water leaving a positively charged head. This imparts a positive charge to all the droplets. Since positives repel each other, all the droplets repel each other and remain as distinct bitumen drops in suspension. A typical cationic emulsifying agent we show below along with a diagram showing the orientation of the agent at the bitumen-water interface and the positive charge imparted to each drop.

Typical Cationic Emulsifying Agent

Typical Cationic Emulsifying Agent

Breaking Characteristics of Emulsions

Part 1

Emulsions exist for ease of application. After application the water to should evaporate and leave the asphalt cement. In a surface treatment, after emulsion and aggregate we apply to the road surface, the emulsion should “break” leaving the asphalt cement holding the aggregate. At that point traffic we allow on the surface without loss of aggregate. The type of emulsion we use has a large effect on the speed of the “break” of an emulsion.
Almost all surfaces have a net negative charge. The strength or intensity of this negative charge may be different from material to material. Because of this phenomenon, anionic and cationic emulsions break in different ways.
In an application of anionic emulsion, negatively charged drops of asphalt we apply to a negatively charged surface. All components repel each other. The only way the emulsion can break is through the loss of water by evaporation.

As more and more water is lost through evaporation, the particles are forced closer and closer together until they can no longer a film of water separate that . At this point droplets coalesce into larger and larger drops and ultimately a sheet of asphalt on the road. A depiction of the application we show below:

cationic emulsion application

Part 2

In an application of cationic emulsion, we are applying positively charge drops of bitumen to a negatively charge surface. The bitumen drops we immediately attract to the surface and begin to break. The emulsion also loses water by evaporation. Thus the cationic emulsion has two breaking mechanisms at work and will break faster than a corresponding anionic emulsion. A depiction of the application we show below:

cationic emulsion application.jpg

The object of a surface treatment is to seal the road from moisture intrusion and provide a new skid resistant surface, but are open to traffic as soon as possible and retain aggregate. Due to the chemistry of emulsions, they may react differently in specific weather and application conditions. If you have problems in any of these areas, the problem could be because of the weather, aggregate condition or emulsion we use.

In bitumen emulsions the basic bitumen we also dilute that in order to facilitate application. Hot bitumen, water and emulsifier we processed in a high-speed colloid mill that disperses the bitumen in the water. The emulsifier produces a system in which fine droplets of bitumen, of between 30% and 80% of the volume, we held in suspension. If they separate in storage, the emulsion can easily agitation restore them.

Bitumen emulsions have a low viscosity and can work with that at ambient temperatures, which makes them ideal for use in road pavements and surfacing. This application requires controlled breaking and setting. The emulsion must not break before they we lay on the road surface but, once in place, they should break quickly so that the road is in service again without delay.


What is tack coat?

Tack coat (also we know as bond coat) is a light application of asphalt emulsion between hot mix asphalt layers we design to create a strong adhesive bond without slippage. Heavier applications may be we use under porous layers or around patches where it also functions as a seal coat.

Why use tack coat?

Without tack coat the asphalt layers in a road way may separate which reduces the structural integrity of the road and may also allow water to penetrate the structure

What type of Emulsion We should use for tack coats?

The type of emulsion we use for tack coats varies from country to country. Normal practice in the USA is to use a slow-setting emulsion that we dilute with water before application. In many European countries cationic rapid setting or specially designate low viscosity medium setting emulsions we use, which we apply undiluted.


Why use prime coat?

Prime coats protect the integrity of the granular base during construction and help reduce dust. In the case of a base which we covered with a thin hot mix layer or a chip seal for a low volume roadway, priming ensures a good bond between the seal and the underlying surface which otherwise would have a tendency to delaminate.

Why use asphalt emulsion prime?

We Compared to cut back asphalt primes, emulsion primes are environmentally friendlier.

What type of emulsion is most suitable for emulsion prime?

Slow-setting grades of asphalt emulsions (that we dilut with water before application) are suitable. With dense granular bases, or stabilizing bases scarifying before application may break the surface, to ensure good penetration.


Penetration Bitumen

Penetration Bitumen

Penetration Bitumen Grade is a standard bitumen usually used as a Paving Grade Bitumen essential for road construction and also for asphalt pavements with superior properties. In addition, it’s very important once it bounds the aggregates and creates a unique cohesion and stability to the bituminous mix.

Furthermore, Bitumen is mainly used in the manufacture of hot mix asphalt for bases and also wearing courses.

pub-ltd Penetration Grade Bitumen is petroleum grade bitumen and manufactured from fractional / vacuum distillation of crude oil. Also The Bitumen supplied by Pars Universal Bitumen is produced from vacuum residue (short residue) feedstock.

Penetration Grade bitumens also specified by penetration and softening point test. Designation is by penetration range only. The penetration grade bitumens have a thermoplastic property which causes the material to soften at high temperatures and to harden at lower temperatures and In addition, this unique temperature/viscosity relationship is important when determining  performance parameters such as adhesion, rheology, durability also uses temperatures of bitumen.

Global Leading Bitumen ( pub-ltd ) supplies all Penetration Graded Bitumen in correspondence to ASTM D946-09 and EN 12591-2009, including:

Penetration Bitumen

ASTM D946-09 Grades:

  • Bitumen Penetration Grade 40-50

  • 60-70

  • 85-100

  • 120-150

  • 200-300

EN 12591-2009 Grades:

  • Bitumen Penetration Grade 20/30

  •  30/45

  •  35/50

  • 40/60

  • 50/70

  • 70/100

  • 100/150

  •  160/220

Iran penetration bitumen has high quality in the world.  It is famous to NIOC Iran bitumen and available in different grades, packing between 10000 MT to 12000 MT monthly.
Available packing is new steel drum, polybag, Bulk bitumen, Bitutank.

Product Summary

Global Leading Bitumen ( pub-ltd ) also is member of syndicate Iranian bitumen exporter (bitumen 40/50, 60/70, 80/100  and  160/220) partner of most drumming factories which has owned export license for exporting all grades of bitumen as per of ASTM standard

Penetration Bitumen

Iran Penetration Bitumen?

It produced from crude oils through fractional distillation. In addition Crude oil also heated to temperatures of between 300 and 350C. Also fed into a distillation column allowing the lightest fractions of crude to separate, through vaporization, from the heavier fractions, which remain liquid.

In addition, higher boiling point fractions are drawn – off by heat exchange and enter a vacuum distillation column. Also this process produces a “short residue” used to manufacture several grades.  The  pressure and temperature conditions  within  vacuum  process  will  determine hardness of the short residue. Also as  such  the  grade  of   produced.

Furthermore short residue maybe modified by air blowing. so In which air is passed through residue at temperatures of 250 – 300 degrees Celsius.
The above are typical Penetration or Paving Grades of bitumen. Additional processing provides other grades of bitumen products such as:

Oxidized bitumen – produced by more vigorous air blowing; and they are more ‘rubber like’ and less temperature susceptible than the paving grades.
Hard Grade bitumen – harder paving grades.

Cutback bitumen – blends of penetration bitumen with solvent such as kerosene.
Emulsions – stabilized suspensions of bitumen in water.
Polymer Modified Bitumen – mixtures of selected bitumen with polymers such as thermoplastics or elastomers.

Bitumen Penetration specification:

Bitumen Pnetration All Grades TDS for download





Cutback Bitumen

What is Bitumen (Asphalt) Cutback Bitumen?

Bitumen is ‘cutback’ by adding controlled amounts of petroleum distillates such as kerosene. This is we do to reduce the viscosity of the bitumen temporarily. So it can penetrate pavements more effectively or to allow spraying at temperatures that are too cold for successful spraying sealing with neat bitumen. The materials we use to cutback bitumen will evaporate after application to leave the remaining material similar in hardness to the original bitumen.

Applications of Cutback Bitumen in Bituminous (asphalt) Pavement Construction and Maintenance:

Prime and Tack Coating

The process of priming involves applying a low viscosity binder that we  prepare but usually unbound aggregate base. It is we intend that the top layers of the base to absorb . And provide a surface more easily ‘wetted’ by a subsequent bituminous covering. The primer will be able to carry traffic for a short time (although this practice is uncommon) and help control dust. Generally, we apply primers at rates between 0.5 and 1.4 L/m2. Cutback bitumens suitable for priming are also we use for tack coats, which we apply to an underlying surface to help with the adhesion of subsequent asphalt layer. A typical application rate is between 0.2 and 0.4 L/m2.

Prime Sealing

Where temperatures are too cool for an effective priming operation, or where traffic is likely to upset a primed surface before the final seal can be sprayed, a primer seal can be used to give adequate protection of the pavement for periods of up to 6 to 12 months. Cutback bitumens suitable for primer sealing can also be used in the manufacture of pre-mix asphalt, which is used in patch repairs.

Spray Sealing

Cutback bitumens we use extensively in sprayed sealing applications. Particularly in cooler weather where they provide improved initial stone retention due to their lower viscosity. Typically, a single application of the appropriate cutback bitumen we spray onto the primed pavement. Onto which aggregate we laid.