۵۰-۷۰ Analysis 

Bitumen 50/70 Analysis


General of Bitumen 50/70

Bitumen Penetration Grade 50/70 is a standard penetration grade Bitumen usually used as a Paving Grade Bitumen suitable for road construction and for the production of asphalt pavements with superior properties. This grade of Bitumen is mainly used in the manufacture of hot mix asphalt for bases and wearing courses. Penetration Grade Bitumen supplied by MAPFA Holding is petroleum grade bitumen, manufactured from fractional / vacuum distillation of crude oil and produced from vacuum residue (short residue) feedstock. Penetration Grade bitumen are specified by the penetration and softening point test. Designation is by penetration range only. The penetration grade bitumen have a thermoplastic property which causes the material to soften at high temperatures and to harden at lower temperatures. This unique temperature/ viscosity relationship is important when determining the performance parameters such as the adhesion, rheology, durability and application temperatures of bitumen.





Test method Unit Specification
Penetration@25 IP 49 Mm/10 ۵۰/۷۰
Softening point ℃ IP58   ℃      ۴۶/۵۴
Resistance to hardening  at 163℃
Chang of mass   %   ۰٫۵


Retained penetration   IP49   %     ۵۰ min
Softening point after hardening   IP58    ℃ ۵۸
Flashpoint ℃   IP36 ۲۳۰ min
Solubility    IP47 Wt %   ۹۹ min
Kinematic Viscosity @135℃    IP370 mm2/S    ۲۹۵ min