Bitumen 60-70
Road bitumens are categorized according to their penetration value and softening point. This classification relies primarily on the penetration range—for instance, bitumen 60-70 indicates a penetration between 60 and 70 and a softening point in the range of 48–52°C. The 60-70 penetration grade is the most commonly used type in road construction projects.
| Bitumen Penetration Grade 60/70 Specifications | ||||
|---|---|---|---|---|
| TEST | UNIT | Requirement | Standard | |
| PENETRATION@25 °C | Mm/10 | 60-70 | ASTM D5 | |
| Softening Point | °C | 49-56 | ASTM D36 | |
| Ductility@25 °C | CM | 100 | ASTM D113 | |
| Loss on heating | Wt% | 0.2 MAX | ASTM D6 | |
| Flash point | °C | 232 MIN | ASTM D92 | |
| Specific Gravity | Gr/cm3 | 99.5 | ASTM D70 | |
| Retained Penetration (T.F.O.T) | % | 68 | ASTM D5 | |
| DENSITY@25°C | Kg/m2 | 1.01-1.6 | ASTM D70 or D3289 | |
| Spot test | ……… | NEGATIVE | A.A.S.H.O.T 102 | |
| Viscosity@135°C | cSt | 300 MIN | ASTM D2170 | |
| Ductility, (25°C) 5CM/min, after TFOT | CM | <50 | ASTM D113 | |
