Penetration Grade Bitumen is a standard bitumen usually used as a Paving Grade Bitumen essential for road construction and for the production of asphalt pavements with superior properties, and it’s very important once it bounds the aggregates and creates a unique cohesion and stability to the bituminous mix.
This grade of Bitumen is mainly used in the manufacture of hot mix asphalt for bases and wearing courses.
Penetration Grade Bitumen supplied by BITUMINA is petroleum grade bitumen, manufactured from fractional / vacuum distillation of crude oil. The Bitumen supplied by BITUMINA is produced from vacuum residue (short residue) feedstock.
Penetration Grade bitumens are specified by the 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. This unique temperature/viscosity relationship is important when determining the performance parameters such as the adhesion, rheology, durability and application temperatures of bitumen.
GLOBALLY BITUMEN supplies all Penetration Graded Bitumen Grades in correspondence to ASTM D946-09 and EN 12591-2009, including:
ASTM D946-09 Grades:
- Bitumen Penetration Grade 40-50
- Bitumen Penetration Grade 60-70
- Bitumen Penetration Grade 85-100
- Bitumen Penetration Grade 120-150
- Bitumen Penetration Grade 200-300
EN 12591-2009 Grades:
- Bitumen Penetration Grade 20/30
- Bitumen Penetration Grade 30/45
- Bitumen Penetration Grade 35/50
- Bitumen Penetration Grade 40/60
- Bitumen Penetration Grade 50/70
- Bitumen Penetration Grade 70/100
- Bitumen Penetration Grade 100/150
- Bitumen Penetration Grade 160/220
Iran penetration bitumen (Iran bitumen 40/50; Iran bitumen 60/70; Iran bitumen 80/100; Iran bitumen 85/100) 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.
Globally Bitumen is member of syndicate Iranian bitumen exporter (Iran bitumen 40/50; Iran bitumen 60/70; Iran bitumen 80/100) and partner of most drumming factories which has owned export license for exporting all grades of bitumen as per of ASTM standard such as :
Iran Bitumen 30/40, Iran Bitumen 40/50, Iran Bitumen 60/70, iran Bitumen 80/100, Iran Bitumen 85/100.
Iran Bitumen is produced from selected crude oils through a process of fractional distillation. The crude oil is heated to temperatures of between 300 and 350 degrees Celsius and fed into a distillation column allowing the lightest fractions of the crude to separate, through vaporization, from the heavier fractions, which remain liquid.
The higher boiling point fractions are then drawn – off via a heat exchanger and enter a vacuum distillation column. This process produces a “short residue” that is used to manufacture several grades of Iran bitumen. The pressure and temperature conditions within the vacuum process will determine the hardness of the short residue, and as such the grade of Iran bitumen produced. The short residue may be further modified by ‘air blowing’ in which air is passed through the residue at temperatures of 250 – 300 degrees Celsius.
The above are the 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; 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.