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What is Bitumen Penetration 60/70?

The major Grade Bitumen is Bitumen Penetration 60/70. It Generally uses for different usages. Penetration grading quantifies the following asphalt concrete characteristics:

Penetration depth of a 100 g needle 25° C (77° F)
Flash point temperature
Ductility at 25°C (77°F)
Solubility in trichloroethylene
Thin film oven test(accounts for the effects of short-term aging that occurs during mixing with hot aggregate)
Retained penetration
Ductility at 25° C (77° F)
In addition, Penetration grading’s basic assumption is that the less viscous the asphalt, the deeper the needle will penetrate.

Grading Bitumen Penetration 60/70:

Penetration also specified by softening point and penetration 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 temperature – viscosity relationship is important when determining  performance parameters such as the adhesion,  durability and usage temperatures of bitumen.

Bitumen Penetration 60/70

 

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