Question

The ductility value of bitumen for suitability in road construction should not be less than

• A. 30 cm
• B. 40 cm
• C. 50 cm
• D. 60 cm

Hint:

- Higher ductility indicates better elongation properties of bitumen, making it more resistant to cracking. - Bitumen with low ductility can lead to brittle failure of roads, causing potholes and cracks.

Answer 1

The Correct Option is C

Step 1: Definition of Ductility of Bitumen Ductility is a measure of the ability of bitumen to stretch under tensile force before breaking. It is expressed in centimeters. Step 2: Standard Requirement for Road Construction According to Indian Standard specifications (IS 73:2013), the ductility value of bitumen used for road construction should not be less than 50 cm. If the ductility value is lower than 50 cm, the bitumen may crack under traffic loading and temperature variations. Step 3: Conclusion Since the minimum ductility requirement is 50 cm, the correct answer is (C) 50 cm.