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Bitumen VG 30

Bitumen VG 30:

Bitumen VG 30   is a standard grade Bitumen usually we use as a Paving Grade Bitumen. It is suitable for road construction and for the production of asphalt pavements with superior properties. Also This grade of Bitumen mainly can use in the manufacture of hot mix asphalt for bases. How ever wearing courses, and possesses characteristics and qualities unique sand quite different from other agents.
They achieve very flexible and tenacious connections with other materials due mainly to viscoelastic response of bitumen.  Which behavior depends on how fast charges we apply. Also Pars Universal Bitumen Supply Viscosity Grade Bitumen and petroleum grade bitumen. Manufacture from fractional / vacuum distillation of crude oil, which practical appliance and behavior varies according to its temperature.

Providing Bitumen VG 30:

Pub-ltd produce Bitumen from vacuum residue (short residue) feed stock. Viscosity Grade bitumens specify by the methods described in ASTM Standard D3381-09 and AASHTO M226-80 (2008). Also Viscosity Grade specifications covers bitumen (asphalt) graded by Viscosity at 60 C (140 °F). There are two methods of grading:ºStandard Viscosity Grade Bitumen (AC-Grades), in which the Viscosity of the standard bitumen (asphalt) measure at 60 ºC (140 ºF). Also RTFOT Viscosity Grade Bitumen (AR-Grades), in which the Viscosity of bitumen (asphalt) is measured at 60 °C (140 °F) after the roll on thin film oven test.

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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

 

 

 

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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.