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)
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.