in 60/70 bitumen what is mean by 60 and 70?



in 60/70 bitumen what is mean by 60 and 70?..

Answer / Nikunj Vashisth

'60' and '70' in 60/70 bitumen refer to the penetration grade of the bitumen. Penetration grade is a measure of the resistance of the bitumen to deformation under a standard load, and it is determined by a penetration test. A lower penetration number indicates a harder bitumen, while a higher penetration number indicates a softer bitumen.

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