Bitumen 50/70
General description of bitumen 50/70
Bitumen 50/70 mostly using in Mediterranean countries and most of the refineries produce this types of bitumen which is soft penetration grade and using as paving grade bitumen suitable for road construction and repair also for the production of asphalt pavements with below technical specification. This grade of bitumen is mainly used in the manufacture of hot mix asphalt for bases and wearing courses.
Differences of 50/70 and 70/100
The viscosity of bitumen 50/70 is higher than of bitumen 70/100 which reduces the workability and the compaction ability of the bituminous mixtures. The stability values were considerably increased at all binder contents when the bitumen was used due to the increase in cohesion force in the mix.
Softening point and penetration
Penetration grade bitumen supplied by ATDM is pure petroleum grade bitumen, manufactured from vacuum bottom by passing hot air. The bitumen supplied by ATDM is produced from remain of crude oil after cracking and removing hydrocarbon. Penetration grade bitumen 50/70 has penetration between 50~70 desi-millimeter and softening point between 52 ~ 58C. The penetration grade has a thermoplastic property which is like as synthetic resin material which gets softer with heating and hardens when cooled. This grade of bitumen 50/70 has very strong viscosity compare to other grades.
Guaranty/warranty of bitumen
ATDM guaranty the quality of bitumen 50/70 with arrangement of international inspector to check quality and quantity of the 50/70 during the loading to vessel and controlling the production by QC by batch test report before shipping. We guaranty the quality to meet with ASTM/EN 12591.
Specification of penetration bitumen
Item | Specification | Test method |
Specific gravity @ 25/25 cg | 1.01/1.06 | D-70 |
Penetration @ 25 c | 70/50 | D-5 |
Softening point c | 46/58 | D-36 |
Ductility @25 c | 100 min | D–113 |
Loss on heating(wt) % | 0.2 Max | D-6 |
Drop in penetration after heating % | 20 Max | D-6 D-5 |
Flash point c | 250 min | D-92 |
Solubility is CS2(wt) % | 99.5 Max | D-4 |
Spot test | negative | A.A.S.H.O.T102 |
