Question

Addition of small quantity of natural rubber in a bitumen will cause
1. Increase in softening point
2. Increase in temperature susceptibility
3. Reduction in brittle point
Which of the above statements are correct?

• A. 2 and 3 only
• B. 1, 2 and 3
• C. 1 and 2 only
• D. 1 and 3 only

Answer 1

The correct option is D 1 and 3 only

Addition of natural rubber changes the properties of bitumen to a great extent. The change in viscocity with temperature is significally reduced. The softening point is increased and its brittle point is reduced.