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Penetration Grade Bitumen is Bitumen classified using the penetration property. Penetration grading’s basic assumption is that the less viscous the asphalt, the deeper the needle will penetrate. Bitumen which is produced during the process of oxidation of vacuum bottom (the Bitumen production feedstock that derives from distillation tower residue in vacuum oil refineries) at bitumen production unit in a manner that its penetration point (kind of test to indicate the hardness of bitumen) in specified group is classified in different grade of Bitumen. Penetration Grade Bitumen is commonly used in road surfacing, and some industrial applications. Additional processing yields other grades of bitumen products and their application
| UNITS | 40/50 | 60/70 | 80/100 | 100/120 | TEST METHODS | |
|---|---|---|---|---|---|---|
| Specific Gravity @25°C | - | 1.01-1.06 | 1.01-1.06 | 1.01-1.05 | 1.01-1.04 | ASTM D-70 |
| Penetration @25°C, 100gm, 5sec | 0.1MM | 40-50 | 60-70 | 80-100 | 100-120 | ASTM D-5 |
| Softening Point, Ring & Ball | °C | 52-60 | 49-56 | 45-52 | 42-49 | ASTM D-36 |
| Ductility @25°C, after TFOT, Min | CM | 100 | 100 | 100 | 100 | ASTM D-113 |
| Loss on Heating, Max | %Wt | 0.2 | 0.2 | 0.5 | 0.5 | ASTM D-6 |
| Drop in Penetration after Heating, Max | % | 20 | 20 | 20 | 20 | ASTM D-6 & D-5 |
| Flash Point Cleveland open cup, Min | °C | 250 | 250 | 232 | 250 | ASTM D-92 |
| Solubility in CS2, Min | %Wt | 99.5 | 99.5 | 99.5 | 99.5 | ASTM D-4 |
| Organic Matter Insoluble in CS2, Max | %Wt | 0.5 | 0.5 | 0.5 | 0.5 | ASTM D-4 |
| Sport Test | - | Negative | Negative | Negative | Negative | *A.A.S.H.O.T.102 |
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