Q. A bitumen sample has been graded as VG30 as per IS : 73-2013. The ‘30’ in the grade means that
A. penetration of bitumen at 25oC is between 20 and 40
B. viscosity of bitumen at 60oC is between 2400 and 3600 Poise
C. ductility of bitumen at 27oC is more than 30 cm
D. elastic recovery of bitumen at 15oC is more than 30%
Ans: Viscosity of bitumen at 60°C is between 2400 and 3600 Poise
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