25.6. Summary

Try these first

1. 1.

   What is the primary goal of dry mix design?

   Hint

   Think about what stability in pavements requires.

2. 2.

   What does gradation help to reduce?

   Hint

   Consider how smaller particles affect the arrangement of larger ones.

3. 3.

   What is the main objective of dry mix design?

   • To increase voids
   • To achieve maximum density
   • To use minimal aggregates

   Hint

   Reflect on what maximizes stability in a pavement design.

4. 4.

   True or False: Aggregate gradation has no influence on the performance of a bituminous mix.

   • True
   • False

   Hint

   Consider how better packing might influence performance.

5. 5.

   Given a set of aggregates with various gradation limits, outline the process you would follow to achieve a specific gradation within those limits.

   Hint

   Think about the steps from understanding limits to selecting aggregates.

6. 6.

   Construct a gradation chart for a hypothetical mix, following Fuller’s law for a defined particle size distribution.

   Hint

   Return to the formula and adjust based on the particle sizes you've chosen.