Penetration-grade bitumen is mainly used in road surfacing. Bitumen with lower penetration grade is used in the regions with warm climate while higher penetration grade is used in colder weather.

Pasargad Oil Company is capable of producing different grades of road surfacing bitumen in compliance with national and international standards in its six plants located at Tehran, Tabriz, Arak, Shiraz, Bandar Abbas and Abadan refineries.
 

Test Methodologi 30-40 40-50 60-70 85-100 100-120
Density ASTM D-7 1/01-1/06 1/01-1/06 1/01-1/06 1-1/05 1/01-1/04
Penetration Rate at 25oC ASTM D-5 30-40 40-50 60-70 85-100 100-120
Softening Point oC ASTM D-36 55 - 63 52-60 49-56 45-52 42-49
Ductility at 25 o C (cm) ASTM D-113 100 Min 100 Min 100 Min 100 Min 100 Min
Flash Point oC ASTM D-92 250 Min 250 Min 250 Min 250 Min 250 Min
Solubility in Disulfide %wt ASTM D-4 99/5 99/5 99/5 99/5 99/5
Stain Test AASHTO T102 Negative Negative Negative Negative Negative
Weight Loss by Heating %wt ASTM D-6 0/2 Max 0/2 Max 0/2 Max 0/2 Max 0/2 Max
Penetration Loss by Heating % ASTM D-6-D-5 20 Max 20 Max 20 Max 20 Max 20 Max