Bitumen 50/70

Hiwa Oil Co, bitumen penetration grade 50/70 is used mainly as a paving grade, which is suitable for road construction, and maintenance. This grade of bitumen is normally used in the manufacturing of hot mix asphalt for pavement bases and wearing courses. Bitumen 50/70 is one of the most used bitumen grades among all other bituminous products.

Penetration bitumen grade 50/70 is produce by process of vacuum Bottom (VB) and air in the reactor. And due to the control of the process conditions, we reaching to pure quality of penetration grade bitumen 50/70 which has a penetration between 50~70. Bitumen is specified by the penetration and softening point test. The penetration grade bitumen 50/70 has a thermoplastic property which causes the material to soften at high temperatures and to harden at lower temperatures. This grade of bitumen 50/70 has very strong viscosity compared to other grades and its widely used.


Guaranty and safety of penetration grade bitumen 50/70

Hiwa Oil Co, guaranty the quality of  penetration grade bitumen 50/70, while inspecting by international inspection companies, the both quality and quantity of Penetration Bitumen grade 50/70, at loading port before loading and completing containers stuffing. The penetration Bitumen grade 50/70 also has its own prove of product quality of each batches by QC, while producing in refinery and before shipping. Hiwa Oil Co, guarantees the quality which meet with ASTM, according to following specification.

Specification of penetration bitumen 50/70
Bitumen 50-70SpecificationTest method
Penetration @ 25 c50/70D.5
Softening point c 49/56 D.36
Ductility @25 c 100 Min D.113
Loss on heating(wt) % 0.2 Max D.6
Flash point c 250 Min D.92
Solubility in CS2(wt) % 99.05 Min D.4
Drop in penetration after heating % 20 Max D.5
Density @25 c 1.01/1.06 D.70/D.3289
Viscosity @60ºc   P2000±400ASTM D 2171
Viscosity@135ºc   CST300 minASTM D 2170
Spot testnegativeA.A.S.H.O.T102