13.4. Bituminous Mix Design Parameters

Try these first

1. 1.

   What does stability in bituminous mixes refer to?

   Hint

   Think about what happens to pavement under pressure.

2. 2.

   Define flow value in the context of bituminous mixes.

   Hint

   It's how much a mix bends or deforms.

3. 3.

   What does stability in bituminous mix design refer to?

   • Resistance to water
   • Resistance to deformation
   • Resistance to heat

   Hint

   Think about what happens to roads with heavy traffic.

4. 4.

   True or False: A low flow value is ideal for a flexible bituminous mix.

   • True
   • False

   Hint

   Consider how flexibility is measured.

5. 5.

   Describe how adjusting the flow value would affect the stability of a bituminous mix. What trade-offs might occur?

   Hint

   Consider the implications of having a very fluid mix versus a dense one.

6. 6.

   Calculate the necessary amount of bitumen for a specified aggregate gradation with a given VMA and desired VFB percentage. Assume the total aggregate weight is 1000 kg.

   Hint

   Use basic principles of proportion and volume calculations.