23.4.2. Ductility test

Try these first

1. 1.

   What is ductility?

   Hint

   Think about how materials behave under tension.

2. 2.

   What is the minimum ductility value specified by standards for bitumen?

   Hint

   Recall the thresholds set by the Bureau of Indian Standards.

3. 3.

   What does the ductility test measure in bitumen?

   • Strength of adherence
   • Ability to elongate without breaking
   • Viscosity

   Hint

   Think about what this property signifies in terms of materials in construction.

4. 4.

   True or False: A higher ductility value means a higher risk of cracking.

   • True
   • False

   Hint

   Consider what ductility means for stress and flexibility.

5. 5.

   A sample of bitumen shows a ductility value of 65 cm. Discuss how this value might impact its performance in a hot climate.

   Hint

   Consider the meaning of ductility and environmental factors.

6. 6.

   How could you experimentally determine the optimum temperature for pouring bitumen to achieve a higher ductility value?

   Hint

   Think of designing experiments and controlling variables to acquire accurate results.