26.1. Overview

Try these first

1. 1.

   What is the purpose of the Marshall Mix Design?

   Hint

   Consider its role in paving durability.

2. 2.

   What does the stability test measure?

   Hint

   Think about the failure point.

3. 3.

   What does the Marshall stability test measure?

   • Maximum load supported
   • Flow capacity
   • Volume of voids

   Hint

   Think about the test objectives.

4. 4.

   True/False: Higher flow values indicate better pavement performance.

   • True
   • False

   Hint

   Consider how materials respond under stress.

5. 5.

   You have a range of bitumen contents from 3.5% to 5% in tests yielding various stability and flow values. You need to determine the best content based on project specifications requiring a minimum flow of 8 units. Analyze and present your findings.

   Hint

   Draw out a graph to visualize the trade-offs.

6. 6.

   Given that a mix design shows abnormal stability results—explain causes and suggest corrective measures while ensuring compliance with established standards.

   Hint

   Remember common pitfalls in mixture preparation.